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  • Cannot access certain URL on my wireless

    - by dehmann
    Problem: On my wireless network at home, there is one URL that I just cannot access with my browser: http://research.microsoft.com/ I have no problems with the Internet connection otherwise. But on that address I just get The connection was reset The connection to the server was reset while the page was loading. from Firefox. I am using a DSL modem (Westell) and Linksys wireless router (using DHCP). When I use my neighbor's wireless connection I can access the microsoft site without a problem. Additional technical details: But with my connection, here is what I get from nslookup. It is weird: It first cannot find the address, but after I look up another address it can find it: $ nslookup research.microsoft.com ;; connection timed out; no servers could be reached $ nslookup google.com Non-authoritative answer: Name: google.com Address: 72.14.204.104 Name: google.com Address: 72.14.204.147 Name: google.com Address: 72.14.204.99 Name: google.com Address: 72.14.204.103 $ nslookup research.microsoft.com Non-authoritative answer: Name: research.microsoft.com Address: 131.107.65.14 But even after nslookup finds it Firefox still cannot access it. Here is what traceroute says: $ traceroute http://research.microsoft.com/ traceroute: Warning: http://research.microsoft.com/ has multiple addresses; using 8.15.7.117 traceroute to http://research.microsoft.com/ (8.15.7.117), 64 hops max, 40 byte packets 1 dslrouter.westell.com (1XX.XXX.X.X) 4.515 ms 2.760 ms 3.072 ms 2 * * * Traceroute just to the IP: $ traceroute 131.107.65.14 traceroute to 131.107.65.14 (131.107.65.14), 64 hops max, 40 byte packets 1 dslrouter.westell.com (1XX.XXX.X.X) 11.912 ms 2.684 ms 2.808 ms 2 * * * Comparison: Traceroute to google.com IP: $ traceroute 72.14.204.99 traceroute to 72.14.204.99 (72.14.204.99), 64 hops max, 40 byte packets 1 dslrouter.westell.com (1XX.XXX.X.X) 6.428 ms 6.981 ms 117.099 ms 2 * * * Any comments / help?

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  • Apache2 - 500 internal server error

    - by Lucio Coire Galibone
    i'm running a VPS with Linux CentOs 6 with 4 GB of RAM, 10 GB of HD and 2 virtual CPU Intel(R) Xeon(R)CPU L5640 @ 2.27GHz. As my host says each virtual CPU must be at least 0.5 physical cpu. At certain times of the day, those with more traffic, trying accessing my php script i receive intermittently "500 internal server error". I activate logging to debug level from apache, and also the PHP logging with E_ALL, but I can't find reference to Error 500 in any logs(I checked the right logs!). I haven't got any .htaccess file in path script. The strange thing is that the error start at first php line in the script (the previous html displays correctly, but at the first php line the script send 500 error). The cpu load is always good (max 0.15 0.08 0.01) and RAM is close to 95% but it arrived to swap just 2 times in a month with 2-5 MB. Apache works with prefork with this values: <IfModule prefork.c> StartServers 8 MinSpareServers 5 MaxSpareServers 20 ServerLimit 280 MaxClients 280 MaxRequestsPerChild 4000 </IfModule> Everthing works correctly and I don't get any error in quiet times, but i start receive errors when traffic rises (6-9000 visits per hour). Can i solve the problem increasing resources? (i can upgrade RAM up to 16 GB). It can depend from reaching MaxClients (but apache must write it on log, right?)? If I upgrade RAM to 6 or 8 GB i have to calculate MaxClients value with this? MaxClients = Total RAM dedicated to the web server / Max child process size Max child process size is around 20M. How else can the problem be? Thanks in advance

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  • Chrome caching 302 redirects

    - by Thermionix
    I have a php script with is used to rotate banner images on a site. Under Firefox/IE page refreshes will make another request and a different image will be returned. Under Chrome, the request seems to be cached and only opening the page in a new tab will cause it to actually query the script. I believe this used to work in older versions of chrome, I've tried a few different types of redirect codes all with the same result. Any tips? <img class="banner" src="/inc/banner.php" alt=""> ~$ cat /var/www/inc/banner.php <?php header("HTTP/1.1 302 Redirect"); header("Cache-Control: max-age=0, no-cache, no-store, must-revalidate"); //header('HTTP/1.1 307 Temporary Redirect'); //header("expires: none"); //header("expires: max"); //header("Cache-Control: public"); $folder = '../img/banner/'; $exts = 'jpg jpeg png gif'; $files = array(); $i = -1; if ('' == $folder) $folder = './'; $handle = opendir($folder); $exts = explode(' ', $exts); while (false !== ($file = readdir($handle))) { foreach($exts as $ext) { // for each extension check the extension if (preg_match('/\.'.$ext.'$/i', $file, $test)) { // faster than ereg, case insensitive $files[] = $file; // it's good ++$i; } } } closedir($handle); // We're not using it anymore mt_srand((double)microtime()*1000000); // seed for PHP < 4.2 $rand = mt_rand(0, $i); // $i was incremented as we went along header('Location: '.$folder.$files[$rand]); flush(); ?> curl output; ~$ curl -I -k https://example.net/inc/banner.php HTTP/1.1 302 Redirect Server: nginx/1.1.14 Date: Fri, 24 Feb 2012 03:23:46 GMT Content-Type: text/html Connection: keep-alive X-Powered-By: PHP/5.3.10-1ubuntu1 Cache-Control: max-age=0, no-cache, no-store, must-revalidate Location: ../img/banner/2.jpg

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  • Git fails to push with error 'out of memory'

    - by jwir3
    I'm using gitosis on a server that has a low amount of memory, specifically around 512 MB. When I try to push a large folder (happens to be a backup from an android phone), I get: me@corellia:~/Configs/$ git push origin master Counting objects: 18, done. Delta compression using up to 8 threads. Compressing objects: 100% (14/14), done. fatal: Out of memory, malloc failed MiB | 685 KiB/s error: pack-objects died of signal 13 error: failed to push some refs to 'git@dagobah:Configs' I've been searching the web, and notably found: http://www.mail-archive.com/[email protected]/msg01747.html as well as http://git.661346.n2.nabble.com/Out-of-memory-error-during-git-push-td5443705.html but these don't seem to help me for two reasons: 1) I am not actually out of memory when I push. When I run 'top' during the push, I get: 24262 git 18 0 16204 6084 1096 S 2 1.2 0:00.12 git-unpack-obje Also, during the push if I run /head/meminfo, I get: MemTotal: 524288 kB MemFree: 289408 kB Buffers: 0 kB Cached: 0 kB SwapCached: 0 kB Active: 0 kB Inactive: 0 kB HighTotal: 0 kB HighFree: 0 kB LowTotal: 524288 kB So, it seems that I have enough memory free, but it's actually still failing, and I'm not enough of a git guru to figure out what is happening. I would appreciate it if someone could give me a hand here and tell me what could be causing this problem, and what I can do to solve it. Thanks! EDIT: The output of running the ulimit -a command: scottj@dagobah:~$ ulimit -a core file size (blocks, -c) 0 data seg size (kbytes, -d) unlimited scheduling priority (-e) 0 file size (blocks, -f) unlimited pending signals (-i) 204800 max locked memory (kbytes, -l) 32 max memory size (kbytes, -m) unlimited open files (-n) 1024 pipe size (512 bytes, -p) 8 POSIX message queues (bytes, -q) 819200 real-time priority (-r) 0 stack size (kbytes, -s) 10240 cpu time (seconds, -t) unlimited max user processes (-u) 204800 virtual memory (kbytes, -v) unlimited file locks (-x) unlimited

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  • Performance: Nginx SSL slowness or just SSL slowness in general?

    - by Mauvis Ledford
    I have an Amazon Web Services setup with an Apache instance behind Nginx with Nginx handling SSL and serving everything but the .php pages. In my ApacheBench tests I'm seeing this for my most expensive API call (which cache via Memcached): 100 concurrent calls to API call (http): 115ms (median) 260ms (max) 100 concurrent calls to API call (https): 6.1s (median) 11.9s (max) I've done a bit of research, disabled the most expensive SSL ciphers and enabled SSL caching (I know it doesn't help in this particular test.) Can you tell me why my SSL is taking so long? I've set up a massive EC2 server with 8CPUs and even applying consistent load to it only brings it up to 50% total CPU. I have 8 Nginx workers set and a bunch of Apache. Currently this whole setup is on one EC2 box but I plan to split it up and load balance it. There have been a few questions on this topic but none of those answers (disable expensive ciphers, cache ssl, seem to do anything.) Sample results below: $ ab -k -n 100 -c 100 https://URL This is ApacheBench, Version 2.3 <$Revision: 655654 $> Copyright 1996 Adam Twiss, Zeus Technology Ltd, http://www.zeustech.net/ Licensed to The Apache Software Foundation, http://www.apache.org/ Benchmarking URL.com (be patient).....done Server Software: nginx/1.0.15 Server Hostname: URL.com Server Port: 443 SSL/TLS Protocol: TLSv1/SSLv3,AES256-SHA,2048,256 Document Path: /PATH Document Length: 73142 bytes Concurrency Level: 100 Time taken for tests: 12.204 seconds Complete requests: 100 Failed requests: 0 Write errors: 0 Keep-Alive requests: 0 Total transferred: 7351097 bytes HTML transferred: 7314200 bytes Requests per second: 8.19 [#/sec] (mean) Time per request: 12203.589 [ms] (mean) Time per request: 122.036 [ms] (mean, across all concurrent requests) Transfer rate: 588.25 [Kbytes/sec] received Connection Times (ms) min mean[+/-sd] median max Connect: 65 168 64.1 162 268 Processing: 385 6096 3438.6 6199 11928 Waiting: 379 6091 3438.5 6194 11923 Total: 449 6264 3476.4 6323 12196 Percentage of the requests served within a certain time (ms) 50% 6323 66% 8244 75% 9321 80% 9919 90% 11119 95% 11720 98% 12076 99% 12196 100% 12196 (longest request)

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  • Maximum limit of filepointer in php reached and not changeable

    - by mlaug
    I have a server with the current 5.3.x version installed. Since we are running a really simple and small server in php using sockets, that connects to a lot clients using sockets we need to raise the open file limit that has been already done on the server for the user, that runs the server #ulimit -a core file size (blocks, -c) 0 data seg size (kbytes, -d) unlimited scheduling priority (-e) 0 file size (blocks, -f) unlimited pending signals (-i) 29879 max locked memory (kbytes, -l) 64 max memory size (kbytes, -m) unlimited open files (-n) 8192 pipe size (512 bytes, -p) 8 POSIX message queues (bytes, -q) 819200 real-time priority (-r) 0 stack size (kbytes, -s) 8192 cpu time (seconds, -t) unlimited max user processes (-u) 29879 virtual memory (kbytes, -v) unlimited file locks (-x) unlimited and we compiled php with --enable-fd-setsize=8192 still we are getting [19-Nov-2012 09:24:23 Europe/Berlin] PHP Warning: socket_select(): You MUST recompile PHP with a larger value of FD_SETSIZE. It is set to 1024, but you have descriptors numbered at least as high as 1024. --enable-fd-setsize=2048 is recommended, but you may want to set it to equal the maximum number of open files supported by your system, in order to avoid seeing this error again at a later date. once in a while in our logs. Anyone knows who to configure the unix server and php correctly to have that working? I found a bug, but that is related to 2006 and marked as "not a bug" https://bugs.php.net/bug.php?id=37025&edit=1

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  • Centos/Postfix able to send mail but not receive it

    - by Dan Hastings
    I have set up postfix and used the mail command to test and an email was successfully sent and delivered. The email arrived in my yahoo inbox BUT the sender also recieved an email in the Maildir directory saying "I'm sorry to have to inform you that your message could not be delivered to one or more recipients", even though the message was delivered. I tried replying from yahoo to the email but it never arrived. I have 1 MX record added to godaddy which i did last week. Priority0 Host @ Points to mail.domain.com TTL1 Hour Postfix main.cf has the following added to it myhostname = mail.domain.com mydomain = domain.com myorigin = $mydomain inet_interfaces = all mydestination = $myhostname, localhost.$mydomain, localhost, $mydomain mynetworks = 192.168.0.0/24, 127.0.0.0/8 relay_domains = home_mailbox = Maildir/ I checked var/logs/maillog and found the following errors occuring postfix/anvil[18714]: statistics: max connection rate 1/60s for (smtp:unknown) at Jun 3 09:30:15 postfix/anvil[18714]: statistics: max connection count 1 for (smtp:unknown) at Jun 3 09:30:15 postfix/anvil[18714]: statistics: max cache size 1 at Jun 3 09:30:15 postfix/smtpd[18772]: connect from unknown[unknown] postfix/smtpd[18772]: lost connection after CONNECT from unknown[unknown] postfix/smtpd[18772]: disconnect from unknown[unknown] output of postconf -n alias_database = hash:/etc/aliases alias_maps = hash:/etc/aliases command_directory = /usr/sbin config_directory = /etc/postfix daemon_directory = /usr/libexec/postfix data_directory = /var/lib/postfix debug_peer_level = 2 home_mailbox = Maildir/ html_directory = no inet_interfaces = all inet_protocols = all mail_owner = postfix mailq_path = /usr/bin/mailq.postfix manpage_directory = /usr/share/man mydestination = $myhostname, localhost.$mydomain, localhost, $mydomain mydomain = domain.com myhostname = mail.domain.com mynetworks = 168.100.189.0/28, 127.0.0.0/8 myorigin = $mydomain newaliases_path = /usr/bin/newaliases.postfix queue_directory = /var/spool/postfix readme_directory = /usr/share/doc/postfix-2.6.6/README_FILES relay_domains = sample_directory = /usr/share/doc/postfix-2.6.6/samples sendmail_path = /usr/sbin/sendmail.postfix setgid_group = postdrop unknown_local_recipient_reject_code = 550

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  • TCP Server Memory management: #Connections Vs. #Requests

    - by Andrew
    Given that, there is no theoretical limit to number of concurrent TCP connections a Windows 2008 server can handle. Only thing will happen is, with each connection there will be memory consumption in server. Unfortunately, memory is not unlimited (and I want to utilize only physical memory). For example, lets say we've 2GB server memory. Now there are two extreme cases: Case 1: If we've allocated 64KB buffer for each connection (only to receive incoming request), then 32768 connections can consume all the 2GB of memory. This will not leave any memory to queue/process incoming requests from those connections. Case 2: On the other hand, lets say a single (or very few) connections continuously keeps sending request buffers (for example, video streaming from one connection to other) and server cannot process them within time, those buffers will get piled up in server and eventually will occupy most of the servers memory. And it will not leave any memory for new connection thereafter. This is the real dilemma in server design bugging me badly for last many days. If I can decide on max size of request buffer per connection and max number of requests to allow in queue per connection. Then, based on available server memory, it will then automatically set limit on max number of concurrent connections. How to decide on these limits to achieve best performance and throughput? I am just looking for perfect utilization of server resources. Are there any standard guidelines or empirical data available with someone who can share with me please.

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  • Torrent upload ratio not updated on Synology DS212+

    - by user179271
    I have a Synology DS212+ NAS running DSM 4.2-3211 (current version). I use it for several purposes including torrent download using Download Station and a tracker that needs authentication. My problem is that my download/upload ratio isn't updated, so it constantly falls down. My NAS is behind a router, and I configured the NAT to forward ports 6890 to 6999 to the internal IP address of the NAS. Here are the Download Station settings : TCP port : 6990, Sharing ratio : 900%, Sharing time : infinite, max download speed : 0 (no limit), max upload speed : 0 (no limit), BT protocol encryption : checked, max numbers of peers allowed by torrent file : 4000, DHT : checked, with port 6889. When the DHT option is not checked, the NAS doesn't upload any files. I don't know what is this option for. Can someone help me to solve this problem ? Did I miss any step, or does it come from the NAT ? How is the authentication managed by Dowload Station ? (Sorry for my english) Thanks.

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  • How to log kernel panics without KVM

    - by Spacedust
    My server is crashing and I can't find an answer why. It all started after my datacenter upgrade RAM from 16 GB to 32 GB. I also found such logs in dmesg - they've started to show itself just before the first kernel panic: EXT4-fs error (device md2): ext4_ext_find_extent: bad header/extent in inode #97911179: invalid magic - magic 5f69, entries 28769, max 26988(0), depth 24939(0) EXT4-fs error (device md2): ext4_ext_remove_space: bad header/extent in inode #97911179: invalid magic - magic 5f69, entries 28769, max 26988(0), depth 24939(0) EXT4-fs error (device md2): ext4_mb_generate_buddy: EXT4-fs: group 20974: 8589 blocks in bitmap, 54896 in gd JBD: Spotted dirty metadata buffer (dev = md2, blocknr = 0). There's a risk of filesystem corruption in case of system crash. EXT4-fs error (device md2): ext4_ext_split: inode #97911179: (comm pdflush) eh_entries 28769 != eh_max 26988! EXT4-fs (md2): delayed block allocation failed for inode 97911179 at logical offset 1039 with max blocks 1 with error -5 This should not happen!! Data will be lost EXT4-fs error (device md2): ext4_mb_generate_buddy: EXT4-fs: group 21731: 5 blocks in bitmap, 60762 in gd JBD: Spotted dirty metadata buffer (dev = md2, blocknr = 0). There's a risk of filesystem corruption in case of system crash. My system is CentOS 5.8 64-bit with latest kernel 2.6.18-308.20.1.el5. How can I check what is the reason of kernel panic without having an access to the KVM ? I have told my datacenter admins to check the memory in the server.

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  • Server Recovery from Denial of Service

    - by JMC
    I'm looking at a server that might be misconfigured to handle Denial of Service. The database was knocked offline after the attack, and was unable to restart itself after it failed to restart when the attack subsided. Details of the Attack: The Attacker either intentionally or unintentionally sent 1000's of search queries using the applications search query url within a couple of seconds. It looks like the server was overwhelmed and it caused the database to log this message: Server Specs: 1.5GB of dedicated memory Are there any obvious mis-configurations here that I'm missing? **mysql.log** 121118 20:28:54 mysqld_safe Number of processes running now: 0 121118 20:28:54 mysqld_safe mysqld restarted 121118 20:28:55 [Warning] option 'slow_query_log': boolean value '/var/log/mysqld.slow.log' wasn't recognized. Set to OFF. 121118 20:28:55 [Note] Plugin 'FEDERATED' is disabled. 121118 20:28:55 InnoDB: The InnoDB memory heap is disabled 121118 20:28:55 InnoDB: Mutexes and rw_locks use GCC atomic builtins 121118 20:28:55 InnoDB: Compressed tables use zlib 1.2.3 121118 20:28:55 InnoDB: Using Linux native AIO 121118 20:28:55 InnoDB: Initializing buffer pool, size = 512.0M InnoDB: mmap(549453824 bytes) failed; errno 12 121118 20:28:55 InnoDB: Completed initialization of buffer pool 121118 20:28:55 InnoDB: Fatal error: cannot allocate memory for the buffer pool 121118 20:28:55 [ERROR] Plugin 'InnoDB' init function returned error. 121118 20:28:55 [ERROR] Plugin 'InnoDB' registration as a STORAGE ENGINE failed. 121118 20:28:55 [ERROR] Unknown/unsupported storage engine: InnoDB 121118 20:28:55 [ERROR] Aborting **ulimit -a** core file size (blocks, -c) 0 data seg size (kbytes, -d) unlimited scheduling priority (-e) 0 file size (blocks, -f) unlimited pending signals (-i) 13089 max locked memory (kbytes, -l) 64 max memory size (kbytes, -m) unlimited open files (-n) 1024 pipe size (512 bytes, -p) 8 POSIX message queues (bytes, -q) 819200 real-time priority (-r) 0 stack size (kbytes, -s) 8192 cpu time (seconds, -t) unlimited max user processes (-u) 1024 virtual memory (kbytes, -v) unlimited file locks (-x) unlimited **httpd.conf** StartServers 10 MinSpareServers 8 MaxSpareServers 12 ServerLimit 256 MaxClients 256 MaxRequestsPerChild 4000 **my.cnf** innodb_buffer_pool_size=512M # Increase Innodb Thread Concurrency = 2 * [numberofCPUs] + 2 innodb_thread_concurrency=4 # Set Table Cache table_cache=512 # Set Query Cache_Size query_cache_size=64M query_cache_limit=2M # A sort buffer is used for optimizing sorting sort_buffer_size=8M # Log slow queries slow_query_log=/var/log/mysqld.slow.log long_query_time=2 #performance_tweak join_buffer_size=2M **php.ini** memory_limit = 128M post_max_size = 8M

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  • Help, my CentOS servers keep going down , No route to host after a random uptime

    - by user249071
    Hello , I have a couple of Centos linux servers, that have a very simple task, they run nginx + fastcgi for php , and some NFS mounts between them, readonly They have some RPC commands to start some downloading processes with wget, nothing fancy , from a main server, but their behavior is very unstable, they simply go down, we tried to monitor ram , processor usage, even network connections, they don't load up so much, max network connections up to... 250 max, 15% processor usage and memory , well, doesn't even fill up, 2.5GB from 8GB max , I have no ideea why can a linux server go down like that, they aren't even public servers, no domain names installed no public serving, for sites. The only thing that I've discovered was that if i didn't restart the network service every couple of hours or so... the servers were becoming very slow, starting apps very slow, but not repoting a high usage of resources...Maybe Centos doesn't free the timeout connections, or something like that...It's based on Red Hat right? I'm not a linux expert , but I'm sure that there are a few guys out there that can easily have an answer to this , or even have some leads to what i can do ... I haven't installed snort, or other things to view if we have some DOS attacks, still the scheduled script that restarts the network each hour should put the system back online, and it doesn't.... Thank you in advance

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  • which grabber is good enough to get 1000fps?

    - by user261002
    I have two framegrabber with a fast camera (1800+ fps). can anybody who understand the hardware, explain to me which of the following grabbers can help me more to grab 1000fps ? here are the the features of the two grabbers : Inspecta-5 Full Camera Link® Version: · Support for line scan and area cameras. · Video data rate of up to 660 Mbytes/sec. · PCI – X bus interface for 64 Bit data width and 66 MHz clock frequency. · PCI bus interface for 32 Bit data width and 33 MHz clock frequency. · 2 Gigabyte Onboard Memory for fast video streams. · Four opt coupled input- output ports for external trigger and encoder signals. · 528 Mbytes/sec. maximum data rate on the PCI–X Bus. · SDK for Windows 2000/XP SILICONSOFTWARE V-Series Camera Link : “microEnable IV VD4-CL” · Camera Pixel Clock Support 85 MHz · Area Scan Cameras 32k * 64k max. image size · Line Scan Cameras 64k max. image width · Acquisition Buffer: 512 MB DDR-RAM · Sustainable Transfer Rate (max.) 850 MBytes/sec. · microEnable SDK for Windows XP/Vista/ 7/ Linux

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  • Pivot Table grand total across columns

    - by Jon
    I'm using Excel 2010 and Power Pivot. I'm trying to calculate confidence and velocity for a development team. I'm extracting some information from our time and defect system each day and building a data set. What I need to do with Excel is do the calculations. So each day I add to my data set 1 row per task in the current project, estimate for that task and the time spent on that task. What I want to calculate is the estimate/actual for each task but also for each person. The trouble is that each day the actual is cumulative so I need to pick out the maximum value for each task. The estimate should remain unchanged. I can make this work at the task level with a calculated measure (=MAX(worked)/MAX(estimate)) but I don't know how to total this up for a person. I need the sum of the max worked for each task. So a dataset might look like: Name Task Estimate Worked N1 T1 3 1 N2 T2 3 1 N3 T3 4 1 N1 T1 3 2 N2 T4 5 1 N3 T3 4 2 N1 T5 1 2 N2 T6 2 3 N3 T7 3 2 What I want to see is for task T1 2 days were worked against an estimate of 3 days - so 2/3. For person N1 I want to see that they worked a total of 4 days against an estimate of 4 days so 4/4. For person N2 they worked 5 days for an estimate of 10 days. Any ideas on how I can achieve this?

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  • apache chokes after 300 connections

    - by john titus
    We have an apache webserver in front of Tomcat hosted on EC2, instance type is extra large with 34GB memory. Our application deals with lot of external webservices and we have a very lousy external webservice which takes almost 300 seconds to respond to requests during peak hours. During peak hours the server chokes at just about 300 httpd processes. ps -ef | grep httpd | wc -l =300 I have googled and found numerous suggestions but nothing seems to work.. following are some configuration i have done which are directly taken from online resources. I have increased the limits of max connection and max clients in both apache and tomcat. here are the configuration details: //apache <IfModule prefork.c> StartServers 100 MinSpareServers 10 MaxSpareServers 10 ServerLimit 50000 MaxClients 50000 MaxRequestsPerChild 2000 </IfModule> //tomcat <Connector port="8080" protocol="org.apache.coyote.http11.Http11NioProtocol" connectionTimeout="600000" redirectPort="8443" enableLookups="false" maxThreads="1500" compressableMimeType="text/html,text/xml,text/plain,text/css,application/x-javascript,text/vnd.wap.wml,text/vnd.wap.wmlscript,application/xhtml+xml,application/xml-dtd,application/xslt+xml" compression="on"/> //Sysctl.conf net.ipv4.tcp_tw_reuse=1 net.ipv4.tcp_tw_recycle=1 fs.file-max = 5049800 vm.min_free_kbytes = 204800 vm.page-cluster = 20 vm.swappiness = 90 net.ipv4.tcp_rfc1337=1 net.ipv4.tcp_max_orphans = 65536 net.ipv4.ip_local_port_range = 5000 65000 net.core.somaxconn = 1024 I have been trying numerous suggestions but in vain.. how to fix this? I'm sure m2xlarge server should serve more requests than 300, probably i might be going wrong with my configuration.. The server chokes only during peak hours and when there are 300 concurrent requests waiting for the [300 second delayed] webservice to respond. Please help..

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  • CodePlex Daily Summary for Thursday, December 13, 2012

    CodePlex Daily Summary for Thursday, December 13, 2012Popular ReleasesHome Access Plus+: v8.6: v8.6.1213.1220 Added: Group look up to the visible property of the Booking System Fixed: Switched to using the outlook/exchange thumbnailPhoto instead of jpegPhoto Added: Add a blank paragraph below the tiles. This means that the browser displays a vertical scroller when resizing the window. Previously it was possible for the bottom edge of a tile not to be visible if the browser window was resized. Added: Booking System: Only Display Day+Month on the booking Home Page. This allows for the cs...Layered Architecture Solution Guidance (LASG): LASG 1.0.0.8 for Visual Studio 2012: PRE-REQUISITES Open GAX (Please install Oct 4, 2012 version) Microsoft® System CLR Types for Microsoft® SQL Server® 2012 Microsoft® SQL Server® 2012 Shared Management Objects Microsoft Enterprise Library 5.0 (for the generated code) Windows Azure SDK (for layered cloud applications) Silverlight 5 SDK (for Silverlight applications) THE RELEASE This release only works on Visual Studio 2012. Known Issue If you choose the Database project, the solution unfolding time will be slow....Torrents-List Organizer: Torrents-list organizer v 0.5.0.3: ????????? ? 0.5.0.3: 1) ?????????? ??????? ??? ?????????? ???-??????? ? ???????-??????. 2) ? ??????? ?????? ??????????? ?????????????? ????? ?????????? ?????????: ???? ?? ??????-???? ?????????? ?? ????????? ?? ????? ???????, ?? ? ????? ????? ????????? ????? ????????? ?? ????, ? ????????? ??? ???? ?????? ??????????.Fiskalizacija za developere: FiskalizacijaDev 2.0: Prva prava produkcijska verzija - Zakon je tu, ova je verzija uskladena sa trenutno važecom Tehnickom specifikacijom (v1.2. od 04.12.2012.) i spremna je za produkcijsko korištenje. Verzije iza ove ce ovisiti o naknadnim izmjenama Zakona i/ili Tehnicke specifikacije, odnosno, o eventualnim greškama u radu/zahtjevima community-a za novim feature-ima. 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Requirements .NET Framework 4.0 (The package contains a solution file for Visual Studio 2010) The unit test projects require Visual Studio 2010 Professional Changelog Legend: [B] Breaking change; [O] Marked member as obsolete Update the documentation. InfoMan: Write the documentation. Other Downloads Downloads Overviewlog4net Dynamics CRM 2011 Appender: log4net Dynamics CRM 2011 Appender DLL: log4net Dynamics CRM 2011 Appender DLLBee OPOA Platform: Bee OPOA Demo V1.0.001: Initial version.postleitzahlensuche: Plz Suche: Eine C# Wpf Applikation, welche ermöglicht nach Postleitzahlen oder Orten zu suchen und als Ergebnis sowohl die Postleitzahl als auch den Ort liefert.Microsoft Ajax Minifier: Microsoft Ajax Minifier 4.78: Fix for issue #18924 - using -pretty option left in ///#DEBUG blocks. Fix for issue #18980 - bad += optimization caused bug in resulting code. Optimization has been removed pending further review.New ProjectsBing Maps WPF Viewer: A helpful multi layer map viewer tool. Features (more soon) : * Tile layers XYZ format * MS SQL Server spatial layerBizTalk Business Rules Engine Pipeline Framework: The BizTalk BRE Pipeline Framework provides increased flexibility in development and maintenance of pipeline components by leveraging the Business Rules Engine.Bootstrap Helpers: Html Helpers for creating Twitter Bootstrap ControlsChord Analizer: Component to help user to analizing chord of a songCodeStudyX: The learning materials of programming.faiztest22: Kudu testingFizzEdit: A multilingual code editor written in C#.FlowDOS: gGDI WebServices: Este projecto está relacionado com a cadeira de Gestão de Dados e Informação, mestrado de Sistema de Informação (Universidade de Aveiro). 2012HyperLinq - Multidimensional LINQ: HyperLINQ is an extension to LINQ that supports multidimensional arrays without dimension limit.ImageTools for WinRT: This is a poring project, so for more details information, pls refer to Sebastian Stehle's page: http://imagetools.codeplex.com/JavuHD - 2D Evolved.: An Amazing next generation High Definition 2D sdk for C#/.Net that uses OpenCL to accelerate a wide variety of features and rendering operations. All in one.MVC ActionValidator: Infrastructure for bisness validationNosso Rico Dinheirinho: Financial control system like Microsoft Money, but via web.Open Song to Chord Pro converter: A converter to convert sheet music from the Open Song format to the Chord Pro formatOpenXML Word AltChunk: Using ALTCHUNK with OPENXML and SharePoint.Project : Afspraaksysteem voor dokters (oefening opleiding Sharepoint & .Net): Een planningsysteem gemaakt door de developers van lokaal 105, in opdracht van Erdem Yarici. Dit in het kader van een Cevora/VDAB Sharepoint & .NET-opleiding.project13271213: 11SIPAS: Support Sip Client Call to FreeswitchSmall Deterministic Embedded Assembler Register Machine: SIDEARM is a minimal, virtual register machine that acts as an interpreter/shell for valid AVR assembly language execution in real-time by the virtual machine.studyx: The learning materials of programming.Unused File Detector: A small program that detects any files not used by Visual Studio solutions.Web.Ajax: Web.Ajax is an AJAX library for the .NET framework. It is designed to make it easy to add ajax functionality to an application. Windows Azure Diagnostics to SQL: Copy Windows Azure Diagnostics (WAD) data from Azure Tables to SQL server to allow for a familiar querying interface.

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  • Maximum number of web parts/web part zones per page? (Microsoft SharePoint 2007)

    - by Kache4
    I've already found the max number of web parts per page: Customizable - in web.config file, <configuration><SharePoint><WebPartLimits MaxZoneParts="XX" /> 50 (default) - http://technet.microsoft.com/en-us/library/cc262787.aspx 100 (recommended max) - http://technet.microsoft.com/en-us/library/cc287743.aspx However, I've been unable to find: the maximum number of web parts per web part zone the maximum number of web part zones per page

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  • Python performance: iteration and operations on nested lists

    - by J.J.
    Problem Hey folks. I'm looking for some advice on python performance. Some background on my problem: Given: A mesh of nodes of size (x,y) each with a value (0...255) starting at 0 A list of N input coordinates each at a specified location within the range (0...x, 0...y) Increment the value of the node at the input coordinate and the node's neighbors within range Z up to a maximum of 255. Neighbors beyond the mesh edge are ignored. (No wrapping) BASE CASE: A mesh of size 1024x1024 nodes, with 400 input coordinates and a range Z of 75 nodes. Processing should be O(x*y*Z*N). I expect x, y and Z to remain roughly around the values in the base case, but the number of input coordinates N could increase up to 100,000. My goal is to minimize processing time. Current results I have 2 current implementations: f1, f2 Running speed on my 2.26 GHz Intel Core 2 Duo with Python 2.6.1: f1: 2.9s f2: 1.8s f1 is the initial naive implementation: three nested for loops. f2 is replaces the inner for loop with a list comprehension. Code is included below for your perusal. Question How can I further reduce the processing time? I'd prefer sub-1.0s for the test parameters. Please, keep the recommendations to native Python. I know I can move to a third-party package such as numpy, but I'm trying to avoid any third party packages. Also, I've generated random input coordinates, and simplified the definition of the node value updates to keep our discussion simple. The specifics have to change slightly and are outside the scope of my question. thanks much! f1 is the initial naive implementation: three nested for loops. 2.9s def f1(x,y,n,z): rows = [] for i in range(x): rows.append([0 for i in xrange(y)]) for i in range(n): inputX, inputY = (int(x*random.random()), int(y*random.random())) topleft = (inputX - z, inputY - z) for i in xrange(max(0, topleft[0]), min(topleft[0]+(z*2), x)): for j in xrange(max(0, topleft[1]), min(topleft[1]+(z*2), y)): if rows[i][j] <= 255: rows[i][j] += 1 f2 is replaces the inner for loop with a list comprehension. 1.8s def f2(x,y,n,z): rows = [] for i in range(x): rows.append([0 for i in xrange(y)]) for i in range(n): inputX, inputY = (int(x*random.random()), int(y*random.random())) topleft = (inputX - z, inputY - z) for i in xrange(max(0, topleft[0]), min(topleft[0]+(z*2), x)): l = max(0, topleft[1]) r = min(topleft[1]+(z*2), y) rows[i][l:r] = [j+1 for j in rows[i][l:r] if j < 255]

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  • Large file uploads from web pages

    - by jerrygarciuh
    Hi folks, I code primarily in PHP and Perl. I have a client who is insisting on seeking video submissions (any encoding) from the public via one of their pages rather than letting YouTube do its job. Server in question is a virtual machine and I can adjust ini settings for max post, max upload size etc as needed. My initial thought is to use a Flash based uploader with PHP on the back end but I wondered if someone might have useful advice and experience on the subject? Peace JG

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  • CrystalReports.NET - varbinary blob

    - by BhejaFry
    Hi folks, what's the proper way to display an image stored in sqlserver database as an varbinary(max) datatype in CrystalReports for .NET? I have added a 'blobfieldobject' item in crystal reports & it is bound to a datatable with the column of type 'varbinary(max)' but the image won't show up instead a dark background is diplayed. TIA

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  • Simple LINQ Aggregate Query

    - by Steven
    What is the vb.net equivalent of the following psuedo-code using LINQ? select min(credits) minCredits, max(credits) maxCredits, min(dollars) minDollars, max(dollars) maxDollars from players minCredits_lbl.Text = minCredits ... maxDollars_lbl.Text = maxDollars I have the following, but I can't figure out how to get any further. Dim query = From row in myDataSet.Tables("Players") _ Select credits = row("credits"), dollars = row("dollars")

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  • Lawler's Algorithm Implementation Assistance

    - by Richard Knop
    Here is my implemenation of Lawler's algorithm in PHP (I know... but I'm used to it): <?php $jobs = array(1, 2, 3, 4, 5, 6); $jobsSubset = array(2, 5, 6); $n = count($jobs); $processingTimes = array(2, 3, 4, 3, 2, 1); $dueDates = array(3, 15, 9, 7, 11, 20); $optimalSchedule = array(); foreach ($jobs as $j) { $optimalSchedule[] = 0; } $dicreasedCardinality = array(); for ($i = $n; $i >= 1; $i--) { $x = 0; $max = 0; // loop through all jobs for ($j = 0; $j < $i; $j++) { // ignore if $j already is in the $dicreasedCardinality array if (false === in_array($j, $dicreasedCardinality)) { // if the job has no succesor in $jobsSubset if (false === isset($jobs[$j+1]) || false === in_array($jobs[$j+1], $jobsSubset)) { // here I find an array index of a job with the maximum due date // amongst jobs with no sucessor in $jobsSubset if ($x < $dueDates[$j]) { $x = $dueDates[$j]; $max = $j; } } } } // move the job at the end of $optimalSchedule $optimalSchedule[$i-1] = $jobs[$max]; // decrease the cardinality of $jobs $dicreasedCardinality[] = $max; } print_r($optimalSchedule); Now the above returns an optimal schedule like this: Array ( [0] => 1 [1] => 1 [2] => 1 [3] => 3 [4] => 2 [5] => 6 ) Which doesn't seem right to me. The problem might be with my implementation of the algorithm because I am not sure I understand it correctly. I used this source to implement it: http://www.google.com/books?id=aSiBs6PDm9AC&pg=PA166&dq=lawler%27s+algorithm+code&lr=&hl=sk&cd=4#v=onepage&q=&f=false The description there is a little confusing. For example, I didn't quite get how is the subset D defined (I guess it is arbitrary). Could anyone help me out with this? I have been trying to find some sources with simpler explanation of the algorithm but all sources I found were even more complicated (with math proofs and such) so I am stuck with the link above. Yes, this is a homework, if it wasn't obvious. I still have few weeks to crack this but I have spent few days already trying to get how exactly this algorithm works with no success so I don't think I will get any brighter during that time.

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  • LINQ Query Help!

    - by rk1962
    Can someone hep me converting the following SQL query into LINQ? select convert(varchar(10),date,110) as 'Date', max(users) as 'Maximum Number of Users', max(transactions) as 'Maximum Number of Transactions' from stats where datepart(Year, Date) = '2010' group by convert(varchar(10),date,110) order by convert(varchar(10),date,110) Thank you in advance!

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  • SQL Server 2008 Geography .STBuffer() distance measurement units

    - by Chris
    I'm working with a geographic point using lat/long and need to find other points in our database within a 5 mile radius of that point. However, I can't seem to find out what the "units" are for STBuffer, it doesn't seem to conform to feet, miles, meters, kilometers, etc. The documentation only refers to them as "units", any suggestions? Thanks [...] from geography::STGeomFromText('POINT(x y)', 4326).STBuffer(z).STIntersects(geography::STGeomFromText('POINT(' + CAST(v.Longitude as varchar(max)) + ' ' + CAST(v.Latitude as varchar(max)) + ')', 4326)) = 1

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