Load Averages In Linux Are Confusing
Jan 26, 2008
the Load averages in Linux I tend to find confusing, I've read that its the system load averaged over 1, 5 and 15 minutes but beyond that I never seem to find a clear cut answer as to what is considered a normal system load.
For instance I have a p4 D 3Ghz with 2gb ram and a single 250gb SATA HDD
the 15min average sits around 0.85 during the busiest time Is that good bad or indifferent?
The server hosts my sites and that of a few friends.
[url]shows what MRTG is outputting about the load averages.
It also says the CPU is 520% although I believe it multiplies it by 10? (i changed the title to say that) so its around 52%
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May 21, 2009
I understand how the load averages are calculated and what the numbers represent but what would be considered a high load average and at what point would the server need upgraded?
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Jun 15, 2009
That would be impossible as the LOAD as given in linux/unix has nothing to do with the cpu load of a server but the total of processes queued (waiting for their turn). If their main node has such a high queue count it should be fairly easy to see for them which process is causing that. No idea why some hosts keep sending their customers to fairytale land every time when it comes to linux load information. Anyways; Exim with that many processes doesnt sound to good either.
As for one VPS bringing down the main node; this is really not that strange as you keep in concideration that a VPS is still a node with many shared customers. Where some things can be regulated, like cpu cycles and memory, but if your node goes completely balistic on its disk IO it will bring a VPS-main node to its knees.
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Mar 26, 2009
I've never fully understood load averages, I've read articles about what it means but I still don't fully grasp what they are and their meaning.
For example, if I'm to understand correctly, if the amount of processors is greater than the load, then the server is not behind on processing. For example, if a server has a load average of 3.4 and is quad core, this would mean it's not 'under strain', correct?
I have a dedicated server, 2 3GHZ CPUs and the following load averages:
Quote:
Load Averages3.25 3.61 3.69
Does this equate to my server being strained, or handling fine?
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Jun 1, 2009
So... I just had an interesting chat over at BlueHost.
One of my clients' sites has been really sluggish lately, and I'm trying to patch and streamline what I can until we can get them migrated over to something more stable.
Anyway, I was looking over things in cPanel and saw that the Server Load was way in the red zone (over 24 on an 8 CPU box)! So I jumped into their live chat, thinking that was the best way to help bring it to their attention quickly.
Here's what I got instead:
Travis [10:13:19 AM]: box439's Server Load is skyrocketing -- in just the past three minutes it has gone from 21.24 (8 cpus) up to 34.12! Even now, it's "stabilizing" at 25 (which is WAY too much for an 8 cpu server).
Brent [10:13:46 AM]: actually, it's not. It's a percentage.
[10:13:52 AM]: 25% of the load
Travis [10:14:03 AM]: No, it's not. 25 = 25cpu equivalent.
Brent [10:14:32 AM]: no, really, it is.
Travis [10:15:24 AM]: Brent, anything over 8.5 generates the "red exclamation mark" icon on the server status page
Brent [10:16:13 AM]: yes it doesn, but it doesn't mean there is an overload
Travis [10:17:06 AM]: ((BlueHost's Server Status page)) says, "2009-06-01 09:10:45: Box under heavy load -- you may experience degraded system performance"
Brent [10:17:39 AM]: i didn't say it wasn't under a heavy load. I was trying ot explain more of what that server cpu item means
Travis [10:18:25 AM]: from ((url)): "At this time of writing, red light is shown for the server loads where the numbers are 18.12 (8cpus). This means there are 18.12 processes in queue - which is over 2 times of CPU capacity."
Brent [10:18:49 AM]: that information is not correct, as we have modified the way our servers display the cpu.
[10:23:32 AM]: I apologize, but it seems you've stepped away. Due to other customers awaiting assistance I am going to have to end this chat. If you have additional questions, we are here for you at all times. Thank you for trying our Live Chat! If you have additional questions, many answers can be found through our Knowledgebase. If you have other issues arise please let us know over live chat or give our Ticket Center a try. Remember our World Class Support is just a click away!
So I'm wondering whether he was completely BS-ing me, or if BlueHost really did modify that output. (And if it's the latter, then why would 25% CPU usage bring the server to a slow crawl?)
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Sep 10, 2008
been checking out this site for a while and finally decided to register because I have a problem. Also hope this is the correct forum for this topic, sorry if it isn't.
So I have a problem with Apache. One of the sites that I run/host has a moderately large vBulletin board, and Apache just seems to eat up the CPU. Load averages have shot up between 20-30 and I've seen it as high as 80. Apache and MySQL are optimized already, I'm using suPHP for security because there are other sites on this box.
The funny thing about this is that it only started happening about a week ago. After checking for rootkits and all that garbage, I reinstalled the OS just to be on the safe side. Everything comes back clean still. I also got fed up and hired Platinum Server Management for a month, to see if they could find a solution (and I've been interested in reselling their services, but that's not relevant). So far the only thing they can come up with is disable suPHP, which isn't an option. I do realize that suPHP is ~20-25 times slower than mod_php, but what totally baffles me is that it worked beforehand and started going all crazy like this. I did try running the site using an dso configuration, the load did drop, but nothing to be proud of.
This site, and the server overall hasn't had any increase in load, I've held off putting new accounts on it until I get this fixed.
In the meantime, I have said forums running on lighttpd, which lowered the load. (Also writing a tutorial on having lighty work with cPanel)
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Feb 17, 2008
I have one server where cPanel WHM displays the load averages at the top right, but another server where it doesn't. How do I enable this? And what do the three different numbers shown (e.g. "Load Averages: 0.99 1.17 1.43") stand for?
way to get MySQL stats such as queries per day and things like that?
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Mar 11, 2009
I am all too familiar with php on my win box but now am working on Linux.
the extension_dir is commented out (??) however CURL does work but there is nothing about CURL in php.ini. I cant find any php.so files.
Also the php.ini file lives in /etc/php5/apache2
Does this look like a standard install? Where do the .so files live?
Ultimatly I want to install Turck MMCache which requires some extensions and when ever I try to do phpize there is the error message
Cannot find config.m4 (google is not helping solve the problem)
apt-get install m4 says I have the latest version.
phpize is a shortcut in usr/bin that points to etc/alternatives/phpize which in turn is a shortcut to usr/bin/phpize5
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Jun 3, 2008
Any Dedicatednow.com customers here? Where do you pay your bills?
I got an invoice but there are about 3 different areas for logging in it seems and I can only log into one of them. But that area does not have an invoice...
Here are the 3 different possible areas.
[url]
[url]
[url]
Which the heck is the correct area for all your billing, so I can contact them for my login? I have been paying last 2-3 months but I cannot remember how on earth I paid. I also don't know how to contact them except their technical support which is support@.
I looked at their initial welcome emails which also don't provide much information, a billing info directs me to the pwebtech website which is just ubersmith - and it looks out of date, I have 2 servers with them but only 1 appear and the latest invoice that was email does not appear nor its server.
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Apr 15, 2008
I wish to build a load balancer on a linux box that will load balance http/https/smtp/pop3 and ftp
what technologies i need to look at?
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Apr 27, 2007
This is a RHEL3 box. It has a couple hundred sites, most of which are pretty quiet most of the time, lately I can't get the load below 3 most of the time. I've tried all the usual TOP PS and the rest, but I'm not seeing my problem. I've attached a text file with extended outputs. but here's what I'm seeing now from TOP and VMSTAT. I'm not sure what else I could be looking at.
I've been watching, and it seems to be Apache most of the time at the top of TOP, and I'm logging slow-queries for myslq, but there aren't many there.
top
10:02:03 up 3 days, 21:23, 2 users, load average: 2.81, 2.83, 3.05
140 processes: 137 sleeping, 2 running, 1 zombie, 0 stopped ....
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Jun 21, 2014
I fixed that there is a process that loads the server and much why it does not.
Name process: md2_resync
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Apr 17, 2015
I've been having a few issues with the control panel navigation is running slow even though I have heaps of resources available and free. The server is located locally and have no problems surfing websites attached to the same server.
When I login as admin, it can take 25 seconds to load into the first screen.
CPU GenuineIntel, Intel(R) Xeon(R)CPU E5649 @ 2.53GHz
Version Parallels Plesk v12.0.18_build1200140606.15 os_CentOS 6
OS CentOS 6.6 (Final)
Memory Available 6GB used 2.5-3GB
HDD: 300GB/ approx 130GB Free
I have tried issuing a /etc/init.d/psa restart command and has made no difference.
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Jul 14, 2015
Plesk Backup work when we make instant backup but not with scheduled backup.
There is nothing in the log files (pmmcli.log & migration.log).
How can we correct?
Plesk 12 / Centos
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Jul 2, 2014
Plesk Panel 12.0.18 , cant load pages in controlpanel (web host edition) it is making timeout all the time and also cannot send mail (roundcube).
What have parallels done to the a nice panel!
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Feb 8, 2015
I have a problem with my plesk panel. Ever since I rebooted my server it won't load the IP:8443 page at all.
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Jul 26, 2015
I am running Plesk Version: 12.0.18 on CentOS.Earlier today my service provider had a massive issue and my server was down for several hours. Upon it being back online i've restarted but now I cannot load any of my pages. I have 10 domains setup and if I ping their name servers or the server IP i get packets received now.
One of my installed domains is [URL] ... now if you try and load this url you get a time out but if you try to access admin page URL....None of the subscriptions are able to load their websites when i type in their URL and well it worked before it went down.
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May 1, 2015
I am troubleshooting a problem where the php5 package was replaced and caused lots of psa/plesk packages to be removed. This system details are;
# cat core.version
11.5.30 Ubuntu 12.04 115140407.17
# lsb_release -a
Description: Ubuntu 12.04.2 LTS
Codename: precise
# uname -a
Linux my.host.name 3.2.0-45-generic #70-Ubuntu SMP Wed May 29 20:12:06 UTC 2013 x86_64 x86_64 x86_64 GNU/Linux
The plesk panel is up, the websites are running, and the email services are running, but there are many errors like so;
==> error.log <==
PHP Warning: PHP Startup: Unable to load dynamic library '/usr/lib/php5/20090626/json.so' - /usr/lib/php5/20090626/json.so: cannot open shared object file: No such file or directory in Unknown on line 0
I also get the following error when inspecting the json module:
root@vps:/etc/php5/mods-available# php -i|grep -i json
PHP Warning: PHP Startup: Unable to load dynamic library '/usr/lib/php5/20090626/json.so' - /usr/lib/php5/20090626/json.so: cannot open shared object file: No such file or directory in Unknown on line 0
/etc/php5/cli/conf.d/20-json.ini,
[Code] ....
What I need to install to get that json.so file back?
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Jul 9, 2014
I am creating new sites in my panel and they are only loading the default page.
The IP is pointed correctly or I would not get the default plesk page.
All the other service seem to work ok. I can ftp in and I can edit files with the online file manager.
If I use the preview feature I can see the changes I make to the files, but that is the only way.
I looked in /var/www/vhosts/system/ and the conf files are present.
What else can I check to see why the sites are not working?
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Dec 10, 2014
Today, without any change on the server side my single running website on my server started running low. After checking the running processes I realised I have these 8 processes running with high cpu load something that didn't had before.
4245 user 20 0 283m 103m 10m R 85.1 0.3 6:44.88 /usr/bin/php-cgi -c /var/www/vhosts/system/domain/etc/php.ini
4243 user 20 0 241m 68m 8736 R 83.8 0.2 6:33.45 /usr/bin/php-cgi -c /var/www/vhosts/system/domain/etc/php.ini
4259 user 20 0 254m 82m 8720 R 83.5 0.3 6:11.00 /usr/bin/php-cgi -c /var/www/vhosts/system/domain/etc/php.ini
4244 user 20 0 282m 103m 10m R 82.1 0.3 6:46.49 /usr/bin/php-cgi -c /var/www/vhosts/system/domain/etc/php.ini
4247 user 20 0 248m 76m 8712 R 78.8 0.2 6:50.31 /usr/bin/php-cgi -c /var/www/vhosts/system/domain/etc/php.ini
4264 user 20 0 258m 85m 8712 R 72.9 0.3 6:49.83 /usr/bin/php-cgi -c /var/www/vhosts/system/domain/etc/php.ini
apache error log doesn't show any warnings, errors.
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May 20, 2014
PRODUCT, VERSION, OPERATING SYSTEM, ARCHITECTURE
Parallels Plesk Panel 11.5.30 MU #44 CentOS 6.5 (Final) 64bit
2 of our our servers are suddenly experiencing high Wait I/O Times, and high Load Averages during the backup process. During this period the Plesk grinds to a halt, sometimes crashing out completely (although SSh is still possible. We have been in talks with our server suppliers (assuming this would be node related) however they have done a lot of testing etc. and categorically state the node is fine , with no other users affecting it.
STEPS TO REPRODUCE : We backup the server using the scheduled backup service and Wait I/O immediately goes up.
ACTUAL RESULT: Plesk downtime / Website downtime
EXPECTED RESULT: No downtime, successful back up
Some other info :
All other processes (MYSQL, apache, Nginx etc) are all running between 1 - 10%
Partition "/usr" utilization 4.2% used (1.81 GB of 43.3 GB) (?)
Partition "/var" utilization 50.6% used (61.8 GB of 122 GB) (?)
We are struggling to identify what has changed on the server that would cause this sudden change.
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May 1, 2014
VPS hosting, stats in my sig below. Have poor performance with a drupal and civicrm(drupal based) website and looking to troubleshoot.
Main issue is pages take too long to load, sometimes over 5 seconds and more! Below is my.cnf and MYSQLtuner results.
So my.cnf
Code:
[mysqld]
set-variable=local-infile=0
datadir=/var/lib/mysql
socket=/var/lib/mysql/mysql.sock
user=mysql
[Code] .....
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Feb 3, 2015
PRODUCT, VERSION, MICROUPDATE, OPERATING SYSTEM, ARCHITECTURE
Parallel Plesk 11,0,9, update 63; OS centOS 6.
PROBLEM DESCRIPTION
when I try to access a domain to make changes, the system gives me this error
Message :
Unable to load object of type Account with id = 18: Account: unable to select: no such row in the table
file common_func.php3
line 3327
Type PleskFatalException
STEPS TO REPRODUCE
In ADMINISTRATION panel, clik DOMAIN -> click on one of 9 domains (only one don’t work)
ACTUAL RESULT
Error message
EXPECTED RESULT
normal operation of domain
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Jan 19, 2015
After doing the upgrade to v12.0.18 when I go in : tools , updates the page does not load . I added to the firewall port 8447 but nothing .
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May 12, 2014
I have been trying to identify why mi server has high load cpu, suddenly CPU load suddenly jumps, from 1 to 40 and until 110
If I restart mysqld and apache, the cpu gets back to normal, until this happen again
My server is
GenuineIntel, Intel(R)Core(TM) i5-2400 CPU @ 3.10GHz
VersionParallels Plesk Panel v11.0.9_build110120608.16 os_CentOS 6
CentOS 6.4 (Final)
CentOS 6 x64 Processor: Intel Core i5 - 3.10 GH
I already installed FAIL2BAN and DDOS DEFLATE without lock. I have CloudFlare Enabled.
When there is a high CPU load, I have checked netstats, and I don't identify many ips connected, so I think it could be an internet script (or virus).
I will paste the result of
ps fax
command, in a moment of high cpu load
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Apr 6, 2015
After enabling File Sharing in Plesk 12, the service appears to function correctly. If only a few files are uploaded, they are ok. However, after uploading a directory structure with a handful of MB, and subdirectories, File Sharing stops. It shows at the top of the screen:
"Internal error: The File Sharing service is temporarily unavailable because the site is down for maintenance."
it also says in the main window:
"Unable to load folders list."
Clicking on Upload Files, that dialog also shows "Unable to load folders list."
I have checked that the ownership of those files on the server is www-data:www-data , and that permissions are 755 for directories and 644 for files, because it seems like ownership and permissions could be an issue, however that doesn't fix it. Removing all the files in the share does fix it, however that's not useful if the files should be available for sharing.
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Aug 31, 2013
I just installed the Health Monitor add-on in a brand new Plesk 11.5.30 on CentOS 6.4 but all that it's area in Plesk displays is this funky looking error:
{"status":"error","statusMessages":[{"status":"error","class":"","content":"Unable to load configuration file.Click to expand...
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Apr 27, 2015
I have a one problem in my server . I use in Parallels Plesk v12.0.18_build1200140606.15 os_CentOS 6 I vps in systemOS CentOS6.6 Final Minimal and installing plesk health monitor show error in :
{"status":"error","statusMessages":[{"status":"error","class":"","content":"Unable to load configuration file.
And I try the command
/usr/local/psa/bin/sw-engine-pleskrun /usr/local/psa/admin/plib/scripts/setup-health-monitor.php
output problem is :
Error: Unable to read /proc/partitions
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Nov 14, 2014
after i migrate from Plesk 8.6 to Plesk 11.5 some of my Domains have trouble.When I want to open one of the Domain i become this error here: Internal error: Unable to load object of type Account with id=340: Account: unable to select: no such row in the table
In the databases i found some of errors here:
Previous error: Template_Exception: Unable to load object of type Account with id=1080: Account: unable to select: no such row in the table (select `id`, `type`, `password` . from `accounts` . where
`id`=1080)
file: /usr/local/psa/admin/plib/Template/Processor.php
line: 27
[code]...
I have already do this here: [URL] .... and reconfigure all my domains again, but the issue dont fix.
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Dec 20, 2007
I've been having trouble with my VPS for a while now. In the QoS alerts page in Virtuozzo it seems to be a problem with numtcpsock and tcprcvbuf, mainly numtcpsock.
Copy these into the browser:
i18.photobucket.com/albums/b106/gnatfish/qosnumtcpsock2.jpg
And when i run cat /proc/user_beancounters:
i18.photobucket.com/albums/b106/gnatfish/beancounters2.jpg
This line is particularly scary:
numtcpsock 164 164 166 166 7321
What do i need to do, to get the website running again? It's only one site on the vps a proxy. So i thought a vps would be able to handle one proxy.
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May 6, 2008
Anyone know of some good server load testers ( commercial )?
Im not looking for application based load testing, I need real web server load testing... need to see how much traffic this one site can take before it cries.
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