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• Performance-optimizing Oracle 10g on a server that is also a Tomcat JSP app server?

  - by PKHunter

  I have inherited a simple RedHat 5 - 64bit platform. It has SCSI disks on RAID1, with 16GB of RAM. Double Core CPU. Oracle 10g, Release 2. This would be a decent platform for running the DB only, perhaps, but the same server in an "A-A mode" clustering (very simple) also runs Tomcat and there are several Java servlets running on this. Sadly there is no caching platform etc. We only use an external CDN for some html caching. I am personally more familiar with web environments on the LAMPP platform (apache, php, mysql, postgresql). PROBLEM: Because the server has both Tomcat JSP/Java and Oracle 10g running on the same server, with no caching, I have some issues of the server going down. Often, sadly. QUESTION: What are my options in terms of improving performance of all these different apps? Connection Pooling? Example, in Postgresql world we have PgBouncer, which really helps things. Does Oracle have something similar? Or is there a famous Java-based external pooler that people use in production environments? (I'm not familiar with Java) Any "SQL cache" as in the MySQL and Postgresql world? Any other kind of application cache, as "APC" or "eAccelarator" in the PHP world? The "OSCache" stuff from the Java world (JSP thingie I found on Google: http://onjava.com/pub/a/onjava/2005/01/05/jspcache.html?page=2) ... What else? Sorry if this is a noob question. I have googled and googled, but problem is I don't know what to google for, other than the broad general concepts above. So if not full answers, I would even appreciate basic pointers and I am happy to JFGI myself. Thanks!

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• What is the world wide web? [closed]

  - by think123

  I don't know where to post this question, so please move it if necessary. Ok, so I've heard of how the professional hosting companies can create 'links' to the world wide web to register an unregistered domain. So that's where my question comes from. Is the world wide web a server to which servers link? Is it created by abstract linkage? I'm not sure. Also, what does it mean for the DNS to be updated throughout the whole world?

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• What are the major distinctions between PureDarwin and FreeBSD?

  - by ??????? ???????????

  I'm looking to install a different unix on my workstation to acquire some perspective on GNU/Linux and out of curiosity. I have narrowed my options down to these two. The reason for considering PureDarwin is because I have very little experience with Apple's products. So my question is will installing and using PureDarwin give me a closer understanding of OSX than would running FreeBSD? What I have in mind are day to day routines like adding users, installing software and configuring various aspects of the underlying OS. I know that the GUI of OSX would not be available, but that is not a concern. As a secondary, less important question, can I buy OS X in the apple store and run it in a virtual machine or does that violate their EULA?

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• Apache Key: Which is it using?

  - by quindraco

  I'm running an Apache server on Ubuntu. When I restart it, it asks me for a pass phrase; here's what the dialog looks like: Apache/2.2.16 mod_ssl/2.2.16 (Pass Phrase Dialog) Some of your private key files are encrypted for security reasons. In order to read them you have to provide the pass phrases. Server 127.0.0.1:443 (RSA) Enter pass phrase: I've already worked out how to remove the pass phrase from the key file in question, but I can't find any information anywhere on how to determine which key file Apache is complaining about in the above dialog. I have dozens of key files on the server in question, although I don't know which ones are in active use (all I did is 'locate .pem' and ignore the false positives). Does anyone know how to track down which pem file I need to remove the passphrase from?

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• Minimize writes to SSD disks with Windows 7

  - by mark

  Most people use their SSD as their primary system installation disk with Windows 7. W7 already has a lot of optimizations for SSDs, both in terms of performance and lifetime. Minimizing writes increases the lifetime of SSDs, so post each suggestion as an answer and let others vote on them. Update: I'm not sure anymore that minimizing writes is a good thing [tm], hard facts that SSDs will degrade within a noticeable time are missing and it seems this it can create a bit FUD about the functionality of the SSD. In other words: I question the usefulness of my wiki question.

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• Host data transfer limit calculations and network protocol headers

  - by UpTheCreek

  OK, this might be a really stupid question, but... I'm building a web app that utilises websockets. There's fairly rapid messaging going on, so I've been taking a look at the network traffic with wireshark, to see if there's any way of reducing the amount of data we are sending over the wire, and hence costs. A typical message has approx 150 byte data payload, and according to wireshark the lower layer stuff takes up about: Ethernet: 14 bytes IP: 20 Bytes TCP: 20 Bytes My question is, are these network headers included in data transfer calculations? What about TCP ACK messages? (another 54 bytes according to wireshark) This may seem petty, but because we have so much messaging going on, and because the payload is a similar size to these headers, it's significant.

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• How can an RSA key be placed in a "non-folder"?

  - by Phil

  I lack a lot of knowledge regarding the subject so please excuse me if my question is very ignorant. I just started out with RSA key authentication to my test-server. It did not work at the beginning and I tried and tried and re-tried to no avail. Then I realised, I was creating "mkdir ~/.ssh" and then "mkdir ~/.ssh/authorized_keys" before placing the id_rsa.pub into the latter folder, which did not work. My question is: How can id_rsa.pub be placed in "authorized_keys", which is not created by "mkdir" therefore not a folder? Thank you.

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• How to get Subversion repository from svn:// and https://?

  - by Hikari

  I know these are noob questions, but I never got my own Subversion running before and I'm kinda lost. I installed VisualSVN in Windows, but it doesn't support svn:// protocol by default, only HTTP or HTTPS. It is working fine over HTTP, and I'm able to manage it from its management tool, see its repositories and get their HTTP-based URL, and from that I'm able to use Tortoise to check out and check in. I'm able to check out from a repository URL using Tortoise: http://Main:90/svn/HikariKrumo/ But I need svn:// protocol for Redmine to access it. Redmine says to support http:// but it reports this error message: The entry or revision was not found in the repository.. And I need HTTPS to access it from Internet. If I can get Redmine to access it from svn:// I can just configure it to use HTTPS in place of HTTP, and I hope it all to works. I like VisualSVN because of its management tool, but I can use another Subversion distro if needed, as long as it supports svn:// and https://. I'm getting crazy on it because it should be simple but I can't get it to work.

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• Why does pinging 192.168.072 (only 2 dots) return a response from 192.168.0.58?

  - by George Duckett

  I mistakenly missed the dot off of an IP address and typed in 192.168.072. To my surprise I connected to a machine at 192.168.0.58 If I ping 192.168.072 I get responses from 192.168.0.58. Why is this? I'm on a Windows PC on a Windows domain. If I ping 192.168.72 I get a response from 192.168.0.72, so it seems the 0 in 072 (in my original mistake) is significant. This question was a Super User Question of the Week. Read the blog entry for more details or contribute to the blog yourself

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• Which browser is the most secure? (research and practically based)

  - by wag2639

  I was wondering which browser is the most secure today, Firefox, Internet Explorer, Chrome, or Safari on a Windows machine with the user running as a Power User/Administrator account. This is not a question about which browser is the best because its the most usable, but more of a question if asked for security, which browser is the most secure given an everyday user's experience (JavaScript, Flash, Ads, etc). Also, would the choice for most secure change if the user was running as a restricted user? To clarify, I'm looking for an answer that's based in research on potential and common exploits and how long it takes for critical problems to be patched.

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• GeForce GT 430 with 1 VGA port and 1 HDMI port can support dual monitor?

  - by Tendou Kishi

  This question is similar to 3 Monitors, 1 graphics card but with different video card. It has the same ports as GT 120 in that question. Would it support dual monitor? I don't need 3 monitors. Just 2 is good. Checked GeForce GT 430 Specs but have no idea whether it will support or not. While on it, can somebody explain how to know whether a graphics card support multiple display from such information?

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• Windows 7 Enterprise, Service Pack 1. Software MS Office Excel 2010

  - by user327560

  In Excel I understand there is no mechanism to customise & re-label the Rows & Columns (i.e. Renaming Col. A to some text like "Item Number" and so on. My question is regarding if it's possible to start Row Numbering at zero, or to determine a pre-allocated number of rows which contain my Headers, and then the first Row with the detail is infact seen as Row 1? Reason for question is I work multiple INternational Projects and we use Excel to trsack alot of activities & issues. Oddly, many people will refer to, for example "Point 7"... Some people mean the ID 7 (which I have the first Column dedicated to ID Number), some mean Excel Row 7, which infact could be really ID 3, or 4 from Col. A.... Any easy way or workaround to just use the Excel Row Numbers but select from when Row 1 is counted?

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• Windows 7 search for files with special characters in name.

  - by Luke

  I have a rather large source code repository on my machine; it is not indexed by Windows Search. I am trying to find some oddly-named generated files of the form .#name.extension.version where name and extension are normal names and extensions and version is a numeric value (e.g. something like 1.186). On Windows XP I could find these files by searching for .#*; on Windows 7 that just returns every single file and directory. So my question is this: is it possible to find files named like that using the built-in Windows 7 search functionality? I did find this question which is very similar, but the answer doesn't work for me; it seems like any special character I put in the query is either ignored or treated as a wildcard, and as a result it matches every single file and directory. Is there perhaps some registry value I can set to make the search-by-filename feature work with special characters?

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• Any script to replace Facebook "fake" links? (Facebook apps requiring installation before viewing content)

  - by Nicolas Raoul

  In Facebook, some links to articles or videos appear to be genuine links, but in fact there are leading to some "content viewing" Facebook apps, like "Dailymotion", "The Guardian", or "Yahoo!". Those apps usually require access to my email address, basic info, birthday, location, plus right to post on my behalf. Some even say in small letters "To use this app, you will be upgraded to Facebook Timeline": Workaround: Copy the name of the article/video Paste it into Google within quotes First result is the original unencumbered content. I don't want to install Facebook spyapps that provide zero value, so I do this every time. QUESTION:Is there a Greasemonkey script or similar, that would perform these 3 steps for me? I am using Chrome on Linux. I hesitated to post this question on WebApps, but over there they are clear that such questions should be posted on SuperUser.

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• Why are the prices for broadband bandwidth at data centers much higher than consumer/small business offerings?

  - by odemarken

  The prices for broadband bandwidth at data centers are sometimes as much as 10x higher than for a typical small business/consumer connection, at least where I live. Now, I understand those are two differend kind of products, but what exactly are the differences? Is it mainly because the bandwidth you get at a data center is guaranteed (CIR), while a consumer offer lists maximal bandwidth (EIR/MIR)? Or are there other factors as well? (Note: my previous, much more specific question on the same general topic was closed as not constructive. I tried to extract the core issue and present it in a way that can be answered objectively. If you feel that this question is still bad and should be closed, please care to comment and explain why.)

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• I want to easily switch accounts for Twitter - is there a Firefox/Chrome/IE plug-in to do this?

  - by Edelcom

  I have several Twitter accounts to which I post messages. One is a personal, one is a professional, and a couple for each software system I developed. Does any one know of a plug-in for one of the major web browses on Windows or program that allows me to easily login to multiple Twitter accounts and easily switch between them ? I now have the 4 major browsers installed on my computer , each with it's own Twitter account (with the password and login info saved), but I think there must be a better way. On a side note: it is getting harder and harder to know to which StackOverflow alike site a question must be posted. So I hope this question here is considered on-topic.

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• Is it possible to cause email to my domain to be handled by gmail?

  - by pitosalas

  [This is a very narrow question, and I don't think it is covered in similar sounding questions] I want to configure my server's DNS so that when someone sends email to [email protected] it is actually deliver it to [email protected] Note: My question is whether this is possible to do ONLY with DNS not with myserver.com's own sendmail. I think the answer is "NO" it is not possible, because when I add an MX record to DNS the email that was delivered to gmail's SMPT server would be TO: [email protected] and it would not know that account. (But I hasten to add that I am just vaguely starting to grok how this all works.)

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• MacPorts on mountain lion - cannot install apache2 due to gettext package

  - by jancha

  I have been having problem with installing gettext package from macports. When I am launching /opt/local/bin/port -v install apache2 it checks dependencies, and continues with gettext package installation. But the configure process freezes here: checking for egrep... /usr/bin/grep -E and nothing happens.. can wait hours, nothing changes. I tried to configure, make, make install manually for that package and it went all fine. But, when same configure is launched by ports, it hangs there. Question: 1) How can that be fixed? 2) Maybe I can somehow manually tell ports, that I installed that gettext package manually already? Sorry, if wrong "site" for this question. Felt most proper one.

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• Networking conflict - What is the most common default computer name for Windows?

  - by John

  I recently had to change the name of my computer to log onto a public wi-fi spot, because a computer with my name was already logged on. (I asked a guy there what to do after it said there was already a computer named "(omitted)" logged on.) I've never been at a wifi spot you had to log into before. I didn't even notice what the computer's name was before. My question is what are the most common default computer names. I'm curious. How often does this sort of problem happen? (For some reason my previous post was closed as off topic - so now I included the reason I'm asking. If it's still considered off topic (networking conflicts) I'll take it elsewhere, but the other forums I know of (ehow.com, answers.yahoo.com) are full of people that couldn't begin to answer a question like this.) Thanks.

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• Networking conflict - What is the most common default computer name for Windows?

  - by John

  I recently had to change the name of my computer to log onto a public wi-fi spot, because a computer with my name was already logged on. (I asked a guy there what to do after it said there was already a computer named "(omitted)" logged on.) I've never been at a wifi spot you had to log into before. I didn't even notice what the computer's name was before. My question is what are the most common default computer names. I'm curious. How often does this sort of problem happen? (For some reason my previous post was closed as off topic - so now I included the reason I'm asking. If it's still considered off topic (networking conflicts) I'll take it elsewhere, but the other forums I know of (ehow.com, answers.yahoo.com) are full of people that couldn't begin to answer a question like this.) Thanks.

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• Is the console command cd a wildcard of sorts? [closed]

  - by Spiritios

  I was wondering while developing some application (though this is not a development question) if the cd command used in Windows is a wildcard or cross-platform command of sorts. I looked up on table with comands for Unix/Linux and MAC OS X and it turns out that it seems to be there. I am not a multi-os user, so I ask if anyone with experience in different OSes can tell me: If this command really exists and works If it has the same functionality (change directory) If there are any problems with its use If in any OS there is another command-line command that does the same in a better/more elaborate/more frequetly used way. Thanks in advance! (P.S.I am not 100% sure if this question belongs to this site or some other stackexchange site...) (P.P.S Any help in tagging this will be appreciated!)

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• How to clean up orphaned SID's in ACEs in AD?

  - by geoffc

  As a follow up to my question Do backlinks clear in AD for deleted users I have another related but different question. Since I am informed in the answers there that a deleted object's SID (Group or User, so assigning rights to group only minimizes the issue, and does not fix it) will remain within ACEs they have been assigned, leaving them orphaned. Lotus Domino, which has similar issues with back references, has an adminp process to clean up such orphaned references. Is there a similar process in AD that would allow you to clean up such orphaned SIDs floating around your domain?

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• What TLDs should I use for my NS records for redundancy? (DNSSEC support required)

  - by makerofthings7

  Question As a general practice, is it a good idea to use multiple TLDs for the name servers? How should I choose between which TLD would be a good candidate for being the root server for my NS name? More Info I am switching over 800 DNS zones to an outsourced DNS provider. I originally planned on setting the zone names to nsX.company.com, but think it would be best to have multiple TLDs such as .net , .org and .info Since I plan on supporting DNSSec at company.com I think all the 1st tier Name servers must support it as well. Part of the inspiration for this question came from our provider UltraDNS. In their configuration screen for our domains, they actively verify and alert us if our name servers aren't exactly: pdns1.ultradns.net pdns2.ultradns.net pdns3.ultradns.org pdns4.ultradns.org pdns5.ultradna.info pdns6.ultradns.co.uk

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• Fastest security check of file tree on NFS

  - by fungs

  I am currently experiencing very bad performance using the following on an NFS network folder: time find . | while read f; do test -L "$f" && f=$(readlink -m $f); grp="$(stat -c %G $f)"; perm="$(stat -c %A $f)"; done Question 1) Within the loop permissions are checked using the variables grp and perm. Is there a way to lower the amount of disc I/O for these kind of checks over the network (e.g. read all meta data at once using find)? Question 2) It seems like the NFS isn't tuned very well, the same operation on a similar network link via SSHFS take only one third of the time. All parameters are auto-negotiated. Any suggestions?

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• How do I reformat/reinstall an OS on a hard drive after its been wiped by eban?

  - by Aggrevated

  I am trying to install XP SP2 Home on a Dell Inspiron 531s. Yes it came with Vista but I happen to own a legal copy of XP. I bought the hard drive off eBay(used). I changed the bios settings to boot from CD and when I start up the computer it goes to the hard drive which says its been cleaned using eban XX.XXX.XXX. My problem is that I can't get the PC to boot from the XP disk. I have tried putting the disk into another PC it works. I have put the bad hard drive back in and the dvd+rw works. I am really stumped and am beginning to think that the hard drive is unusable. I only have the sata cords for 1 hard drive to be hooked up at a time. Any ideas or suggestions or confirmation that I can't use this hard drive would be appreciated. Yes I am probably a 'noob' but I have installed XP and Vista many times without any problems. I don't need to be put down on my level of experience I just need answers. Thanks Everyone

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