Search Results

Search found 26798 results on 1072 pages for 'difference between detach attach and restore backup a db'.

Page 519/1072 | < Previous Page | 515 516 517 518 519 520 521 522 523 524 525 526  | Next Page >

• Why is my concurrency capacity so low for my web app on a LAMP EC2 instance?

  - by AMF

  I come from a web developer background and have been humming along building my PHP app, using the CakePHP framework. The problem arose when I began the ab (Apache Bench) testing on the Amazon EC2 instance in which the app resides. I'm getting pretty horrendous average page load times, even though I'm running a c1.medium instance (2 cores, 2GB RAM), and I think I'm doing everything right. I would run: ab -n 200 -c 20 http://localhost/heavy-but-view-cached-page.php Here are the results: Concurrency Level: 20 Time taken for tests: 48.197 seconds Complete requests: 200 Failed requests: 0 Write errors: 0 Total transferred: 392111200 bytes HTML transferred: 392047600 bytes Requests per second: 4.15 [#/sec] (mean) Time per request: 4819.723 [ms] (mean) Time per request: 240.986 [ms] (mean, across all concurrent requests) Transfer rate: 7944.88 [Kbytes/sec] received While the ab test is running, I run VMStat, which shows that Swap stays at 0, CPU is constantly at 80-100% (although I'm not sure I can trust this on a VM), RAM utilization ramps up to about 1.6G (leaving 400M free). Load goes up to about 8 and site slows to a crawl. Here's what I think I'm doing right on the code side: In Chrome browser uncached pages typically load in 800-1000ms, and cached pages load in 300-500ms. Not stunning, but not terrible either. Thanks to view caching, there might be at most one DB query per page-load to write session data. So we can rule out a DB bottleneck. I have APC on. I am using Memcached to serve the view cache and other site caches. xhprof code profiler shows that cached pages take up 10MB-40MB in memory and 100ms - 1000ms in wall time. Pages that would be the worst offenders would look something like this in xhprof: Total Incl. Wall Time (microsec): 330,143 microsecs Total Incl. CPU (microsecs): 320,019 microsecs Total Incl. MemUse (bytes): 36,786,192 bytes Total Incl. PeakMemUse (bytes): 46,667,008 bytes Number of Function Calls: 5,195 My Apache config: KeepAlive On MaxKeepAliveRequests 100 KeepAliveTimeout 3 <IfModule mpm_prefork_module> StartServers 5 MinSpareServers 5 MaxSpareServers 10 MaxClients 120 MaxRequestsPerChild 1000 </IfModule> Is there something wrong with the server? Some gotcha with the EC2? Or is it my code? Some obvious setting I should look into? Too many DNS lookups? What am I missing? I really want to get to 1,000 concurrency capacity, but at this rate, it ain't gonna happen.

  Read the article

• Server Vs Service / Physical Vs Virtual

  - by user559142

  When reading definitions for a server service (e.g. iis) you will often find that there are several cross references to a virtual server but none seem to definitively refer to the two as the same..... Can somebody help me to understand the differences - I cannot get my head around what the difference between each is? Ideally I would like to know the differences between the following/or indeed if any refer to the same... 1) Logical Server 2) Virtual Host 3) Logical Partition 4) Physical Server Vs Virtual Server 5) Server Service Vs Virtual Host

  Read the article

• What are the recognized ways to increase the size of the RAID array online/offline?

  - by user149509

  Is it possible, in theory, increase the size of the RAID-array of any level just by adding new drive(s)? Variant like "backup whole data - delete old array - add/replace disks - create new array - restore data" is obvious so what are the other options? Does it depend on the RAID-level only or on the implementation of RAID-controller only, or on both? Adding new disks to a striped array necessarily leads to a rebuilding of the array with the redistribution of the strips to the new drives? What steps should be done to increase size of RAID-array in online/offline scenarios? Especially interesting RAID-5 and RAID-10. I would like to see the big picture.

  Read the article

• Snow Leopard Windows 7 File sharing issue

  - by nsiggel

  Hello, wondering if anyone might have any suggestions on how to fix this issue in file sharing between Snow Leopard and Windows 7. On my home network, I have a system running windows 7 which acts as a file server: \WINDOWS7-A\SHARE I also have an IMac which can access the file share most of the time.... however now comes the problem, as soon as I introduce my Windows 7 Laptop and copy files over from it onto the file server (\Windows7-A), the file server become no longer accessible from the Snow Leopard machine... I assume this somehow has to do with elevated security on the network share having been negotiated between the 2 Windows 7 machines which is no longer allowing the Mac to see the Windows machines... but not sure how to disable this, as the only way I can restore communication between the mac and the Windows 7 machine is to restart it... less than ideal... Any suggestions would be welcome.

  Read the article

• Ubuntu 10.4 No internet

  - by Keeper780

  I have Ubuntu 10.4 dual booted with Windows Vista on a work Lenovo R61 laptop. The home and work wireless connection were working fine. I lost all internet connection at work. The IT guy clearly knew nothing about Linux. Since he 'fixed' it get nothing, no wlan signal the Network manager icon was gone, no internet. I still have the live disc and if I run from the live disc the connections are there and everything works perfectly. How do I restore the internet easily on my laptop. I have been using Linux for 3 Years but I am still a bit of a newbie, this is the first major problem I've had in three years. It's driving me nuts. Thanks

  Read the article

• Is USB 2.0 sufficient for streaming video off of an external hard drive?

  - by Alex

  Or should I pony up for a usb 3.0 external hard drive? (my mobo will support it) I intend to only use it for playing videos if that makes a difference. I know close to nothing about hardware so let me know if you need more info.

  Read the article

• How can I make a non-destructive copy of a (NTFS) partition?

  - by violet313

  I want to recover some deleted files from a healthy NTFS partition on an undamaged hard-disk. In order to leave the partition undisturbed, i plan to use dd to clone the partition to a raw image file & then attempt recovery from that mounted clone. Will dd if=/dev/sd<xn> of=/path/to/output.img perform a non-destructive copy ? Is attempting a restore from a clone using dd the best approach? [edit, wrt Deltiks answer, i need to be a bit clearer about what i'm asking] eg: are there some s/w that can do something more with the original sectors ? eg: if it was a damaged hard-disk i am aware that any kind of read is potentially destructive. but assuming my disk head is not going to suddenly spaz out etc, am i reducing my chances of a successful recovery (at any cost) by using an apparently non-destructive single read of my undamaged hard-disk. (btw: i am planning on using ntfsundelete & testdisk for recovery)

  Read the article

• Clean install vs disk image

  - by Thanos

  Once a year I am making a clean install on windows, in order to keep my system fast. After posting a question on making a bootable windows usb with exe programs where I was adviced to make a disk image, a new question rose. What is the difference in making a disk image and performing a clean install on windows? Which is better in terms of speed, general performance, value for time and transfering between different computers?

  Read the article

• Google Chrome not using local cache

  - by Steve

  Hi. I've been using Google Chrome as a substitute for Firefox not being able to handle having lots of tabs open at the same time. Unfortunately, it looks like Chrome is having the same problem. Freakin useless. I had to end Chrome as my whole system had slowed to a crawl. When I restarted it, I opted to restore the tabs that were last open. At this stage, every one of the 20+ tabs srated downloading the pages they had previously had open. My question is: why can't they open a locally stored/saved copy of the web page from cache? Does Google Chrome store pages in a cache? Also: after most of the pages had completed their downloading, I clicked on each tab to view the page. Half of them only display a white page, and I have to reload the page manually. What is causing this? Thanks for your help.

  Read the article

• Move and clone VirtualBox machines with filesystem commands

  - by mit

  I know of 2 ways to clone a VirtualBox machine on a linux host, one is by using the VirtualBox gui and exporting and re-importing as Appliance (in the file menu of VirtualBox). The other is by cloning only the virtual disk containers: VBoxManage clonevdi source.vdi target.vdi (Taken from http://forums.virtualbox.org/viewtopic.php?p=853#p858 ) I would have to create a new VM afterwards and use the cloned virtual disk. Is there a way I can just copy a virtual disk and the and do the rest by hand? I'd have to manually edit the ~/VirtualBox/VirtualBox.xml and insert a new disk and a new machine: Can I just make up UUIDs or how would this work? I would very much prefer this hardcore method of doing things as it allows me to freely and rapdily backup, restore, move or clone machines. Or ist there a better way to do this?

  Read the article

• Would it be better to have 10 GB PC5300 or 8 GB PC6400?

  - by jayrdub

  My development machine is heavy on memory usage. It currently only has 4GB of PC5300. I'm going to buy 8 GB of RAM, but should I take out all my existing memory and install just PC6400 or leave some of the original and stick with 5300? I don't know if I'll ever need more than 8GB, I might, I'm just wondering if the speed difference between 5300 and 6400 is worth trashing the 2 or 3 GB of old RAM I would still have room for after adding the new RAM.

  Read the article

• What is the bitrate of itunes streaming

  - by The Journeyman geek

  I've been using itunes streaming (in part cause its easy) to access my music collection between two windows PCs. I'm half certain it sounds kinda 'flat' so i'm wondering, what bitrate it uses, and format - it sounds fine off a PMP, and even better on a PC, so i assume i can tell the difference.

  Read the article

• How to suspend and resume browser tab groups?

  - by Robin Green

  Modern browsers such as Firefox and Chrome are able to shutdown and restore the same group of tabs they had before the next time you open them, and even sometimes remember additional tab state such as scroll position within the tab. I would like ideally to be able to select a group of tabs (about some coherent theme, perhaps) and save them away into some kind of "folder" that I could later open independently, without opening any other tabs. Obviously I can use bookmarks for this, but bookmarks are kind of old-fashioned. It would be excellent if it could also record forms that I had filled in but not submitted, scroll position, tab position within the tab group, and any other "dynamic" aspects of the current tab state.

  Read the article

• Would it be better to have 10 GB PC5300 or 8 GB PC6400?

  - by jayrdub

  My development machine is heavy on memory usage. It currently only has 4GB of PC5300. I'm going to buy 8 GB of RAM, but should I take out all my existing memory and install just PC6400 or leave some of the original and stick with 5300? I don't know if I'll ever need more than 8GB, I might, I'm just wondering if the speed difference between 5300 and 6400 is worth trashing the 2 or 3 GB of old RAM I would still have room for after adding the new RAM.

  Read the article

• Change base language of Windows 8 Installer

  - by Firedragon

  I have access to Dreamspark and Windows 8. When I picked the version I picked English which is fine, but it is US English however I realised I should have picked UK English instead. You are only allowed one version so i cannot switch it. Now, I can change the language pack later to UK English but in the language bar US English is always listed and seems impossible to remove and system restore reverts to US English. Is there a way to fully change the base language to UK in the installer, so in effect makin the installer offer US and UK English, or just UK English as if I had chosen the correct version?

  Read the article

• Windows + Jolicloud crash!

  - by SystmHck

  My girlfriend's Acer Aspire One netbook just crashed running Windows XP. It crashes at the boot process, displays the blue screen for a second and then reboots. I also installed Jolicloud through Jolicloud Express but I am not able to boot it either. I suspect it's a virus... When running a Ubuntu live session from a pendrive it seems like the Acer partition is corrupted. In a partition program it says to run chkdsk in Windows to fix it. I have used Ubuntu for a while but I am not an expert so I wanted to ask: How do I restore my NTFS damaged partition?

  Read the article

• DNS Setting keeps changing on me

  - by Chiggins

  So on my Windows Server 2008 box, I have a DNS server installed on it. For some reason, every ten minutes or so, the Host (A) address for the computer keeps on changing to its internal private IP address. I want it to have its public address for Active Directory purposes, but it keeps changing itself back to the private IP address. Any idea as to why, and how to change it? If it makes a difference, this is an Amazon EC2 server. Thanks

  Read the article

• Computer connects to lan, but not the internet

  - by Jay

  I have a computer with Vista Home that can connect to the router, but it cannot get on the internet. I cannot ping google.com, the request times out. I've tried this on two separate networks and have no trouble with other computers connecting. I've renewed ipconfig, reset winsock, updated the wireless adapter, and the hosts file looks fine. I've tried disabling the firewall as well as a direct wired connection. I did a scan with Norton and it didn't find anything. Is there anything else I can try before resorting to a system restore? Update (Copied from Answer) Windows Update was able to find updates and install them (though, they could have already been downloaded previously). When I pinged Google by using their IP 66.102.9.103, it said it lost 25 percent of the packets. I successfully flushed the DNS but it didn't help. Also, I found safe mode with networking works fine.

  Read the article

• Can files deleted on an ecnrypted drive be restored?

  - by roddik

  Hi. There are ways to restore files, deleted from the system by default, I'm not sure about the way they work but I guess thet read content, that has not been overwritten. On the other hand, there are programs (e.g. TrueCrypt), that encrypt disks, claiming that it wouldn't be possible to tell apart random data and file contents on such a disk without a password. Therefore I think that files, deleted from such disks can't be restored. Is that correct? I know one way to find out would be to try it, but there is a possibility, that I would just pick the wrong restoring software. Moreover, I'm more interested in theorethical explanation why it would/wouldn't be possible. Thanks

  Read the article

• Getting a Non-Genuine windows message on a Genuin Windows 7

  - by user36257

  I have a Genuin Win7 enterprise on my Laptop. A few hours ago when I wanted to log into windows it did not accept my Password. I used the safe mode and it accepted the password I was using before this new password. It is the laptop for work and we have a changing password policy for every three months, so the pasword that I could use in SAFE MODE was the password I had for the last previous threee months. ... after that I used SYSTEM RESTORE and it reveretd it back to Yesterday ... so this time I could loging successfully with my current password. BUT It shows me a message that I am a victim of software counterfeiting and when I restarted the windows again and logged into windows, this time it is just a black desktop. weird...any ideas?

  Read the article

• Project not publishing start/finish date for custom TFS work items

  - by pete the pagan-gerbil

  I've got a TFS 2012 project set up with custom work items, that include Start and Finish date read-only fields (Microsoft.VSTS.Scheduling.StartDate and FinishDate). When I publish one of those custom work items from within Office Project, it does not populate those fields the same way as when I publish a Task work item (builtin TFS work item). I've looked at the transitions in the work items, and also the TFS project field mapping XML file but can't find anything that explains the difference in behaviour. What am I missing?

  Read the article

• After installing Windows 8, boot hangs before BIOS setup

  - by Joe Purvis

  I have an Alienware M15x, 940MX processor, 16 GB RAM, 512GB M4 SSD, and I was running Win7 64bit. I backed up the disk and ran Win 8 setup. Setup appeared to go well through multiple reboots. After the last reboot, it simply stopped after POST at "Press F2 for bios setup". I have tried powering off, reducing RAM to one stick, removing MOS battery. Now, it gets to the screen with "Press F2 for setup" and "Press F12 for boot options". If I press F2, I get a single beep only. If I press F12, nothing. I cannot get into the BIOS to change boot options to boot from another disk and restore. I do have the latest BIOS. I am going to try replacing the CMOS battery, but I don't think that is likely to help. The computer has been fast and very reliable until now.

  Read the article

• Problem accessing MICROSOFT##SSEE database (Error: 18456, Severity: 14, State: 16.)

  - by Philipp Schmid

  After an unexpected server shutdown due to a power failure, I can no longer connect to the internal windows database MICROSOFT##SSEE which is hosting Central Admin for my SBS 2008 server. The log shows: Error: 18456, Severity: 14, State: 16. Login failed for user 'NT AUTHORITY\NETWORK SERVICE'. [CLIENT: <named pipe>] I've tried to connect using the SQL Management studio (connecting to .pipemssql$microsoft##sseesqlquery) but no luck. The SQL Server Configuration Manager doesn't show a entry for 'Protocols for MICROSOFT##SSEE' (but shows it for 2 other database hosted on the same SQL server 2005 Express edition. I have tried to restore the master.ldf and mastlog.log files from a backup, but the issue persists.

  Read the article

• What OS for Eee PC ?

  - by crivateos

  Hello. I've just bought new Eee PC 1005 (with Atom N450, 250GB and 2GB memory) without any pre-installed system. Now I'd like to install windows and linux distribution on in. What should I choose ? I am a programmer and web designer, so I need Java IDE , Python interpreters, and Photoshop (on windows). Will Win 7 Pro 32bit work ?Or should I choose Windows XP ? And what about linux distro ? Ubuntu, Eeebuntu, Ubuntu netbook edition ? btw is it true that linux's grub overrides mbr so that hardware system restore doesn't work ?

  Read the article

• Dedicated Server or Terminal Server

  - by Lerner

  Asked this question by a software provider. How would I know? What's the difference?

  Read the article

< Previous Page | 515 516 517 518 519 520 521 522 523 524 525 526  | Next Page >