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Thread: server loads !
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10-16-2009, 03:15 PM #1Web Hosting Master
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server loads !
Hi,
What is exceptable loads on a vps
I have an top end vps 2gb ram but always see %wa hitting 14.0
is there any progs i can install to monitor loads
regards
keithVPS & Dedi with -
UKServers (8/10) Clouvider (7/10) 12 month, Rapidswitch (1/10) 15Years+, Hivelocity (10/10) 7 Years, Clustered net (10+/10) 17Years+
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10-16-2009, 03:26 PM #2Custom Hosting Master
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Munin should do the trick. The %wa is the i/o wait time, and is related to your disks.
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10-16-2009, 03:29 PM #3Web Hosting Master
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That seems more then a bit high. I get concerned if I start seeing server load hit 5 on any type of frequency.
http://www.sysadmin.md/web-based-too...r-servers.html
Cacti
Ganglia
Hyperic HQ
Monit
Munin
Nagios
OpenNMS
PRTG (freeware version)
phpSysInfo
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10-16-2009, 03:32 PM #4Web Hosting Master
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What virtualization technology is the provider utilizing? It sounds like an oversold hardware node where you have some heavy users and you are a victim of the shared nature of a VPS.
Xen is a bit better about preventing this from happening, but it is still susceptible to such performance hits.
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10-16-2009, 03:46 PM #5Web Hosting Master
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Im on servints ultimate vps, virtousso/plesk, centos 5.3, 2gb ram burst 4gb
With high spec and less vps's per node, just means each vps could host loads more sites hitting the resources harder, swings and round-a-bouts i guess
Support always says we dont see the high loads, let us know when this happens again, but they respond upto 3hours later
Here is the current top results
top - 15:45:06 up 7 days, 37 min, 1 user, load average: 0.72, 0.41, 0.35
Tasks: 87 total, 1 running, 84 sleeping, 0 stopped, 2 zombie
Cpu(s): 0.9%us, 0.5%sy, 0.0%ni, 66.7%id, 32.0%wa, 0.0%hi, 0.0%si, 0.0%st
Mem: 4194304k total, 1070624k used, 3123680k free, 0k buffers
Swap: 0k total, 0k used, 0k free, 0k cached
PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND
26310 apache 18 0 305m 35m 18m S 3.7 0.9 0:00.31 httpd
14007 apache 15 0 306m 47m 29m S 2.7 1.2 0:00.87 httpd
30561 apache 15 0 306m 29m 10m D 1.3 0.7 0:00.18 httpd
26344 apache 18 0 306m 46m 28m S 1.0 1.1 0:00.50 httpd
25672 root 15 0 2124 1056 820 R 0.7 0.0 0:03.26 top
1 root 18 0 1988 652 560 S 0.0 0.0 0:02.82 init
4063 postfix 15 0 6976 2440 1980 S 0.0 0.1 0:00.04 smtp
5168 root 15 0 32268 29m 2336 S 0.0 0.7 0:24.10 spamd
5924 matchmeu 19 0 8120 2176 1332 S 0.0 0.1 0:00.00 crond
5927 urban 18 0 8120 2192 1336 S 0.0 0.1 0:00.00 crond
5928 urban 21 0 8120 2192 1336 S 0.0 0.1 0:00.00 crond
5935 urban 22 0 0 0 0 Z 0.0 0.0 0:00.00 curl <defunct>
5936 urban 18 0 0 0 0 Z 0.0 0.0 0:00.00 curl <defunct>
5944 matchmeu 18 0 28304 11m 6320 S 0.0 0.3 0:00.10 php
5953 urban 20 0 6800 1736 1384 S 0.0 0.0 0:00.00 sendmail
5955 urban 18 0 6804 1740 1384 S 0.0 0.0 0:00.00 sendmail
5959 urban 18 0 6772 1700 13VPS & Dedi with -
UKServers (8/10) Clouvider (7/10) 12 month, Rapidswitch (1/10) 15Years+, Hivelocity (10/10) 7 Years, Clustered net (10+/10) 17Years+
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10-16-2009, 04:04 PM #6Web Hosting Guru
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Post the top and sar command output in their forum and see what Bob others have to say about it, I am pretty sure you will get a positive response.
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10-16-2009, 07:59 PM #7Corporate Member
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Hi,
Based on top, you are barely using 1/4 of the amount of RAM you're allocated. The hard drives do seem to be overloaded so this is something only your provider can resolve. Take the same top output you have pasted here and ask them to investigate the root cause. Most likely a VPS on the same server is hitting the disk hard (or remote VPS if this is a SAN).
These problems could be resolved by getting a Xen node instead. So ask your provider to move your VPS to such technology. I believe they're managed.
RegardsLast edited by UNIXy; 10-16-2009 at 08:04 PM.
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10-17-2009, 10:50 AM #8Web Hosting Master
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Ive posted this to their forum
but as far as there support goes, there is nothing that can be done to help this
so anyone can hog the disks and effect all vps on the node :-(
I would think my only option is to get rid of ultimate and go back to signature plan and start looking around for non overloaded vps
Some days my sites load in 4 sec other days its over 20secs and grahics time out
very frustrating to me and my clients
Thanks to all
KeithVPS & Dedi with -
UKServers (8/10) Clouvider (7/10) 12 month, Rapidswitch (1/10) 15Years+, Hivelocity (10/10) 7 Years, Clustered net (10+/10) 17Years+
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10-17-2009, 10:57 AM #9Web Hosting Master
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And that is what is the problem with most VPS solutions - Memory and CPU are resources which can be defined and limited by most virtualization packages, but disk IO is something which can not be individually limited. You see the same issues on some clouds (or maybe even all) as well; so some start to offer bare-metal clouds with own disks as a solution to this problem.
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10-17-2009, 12:17 PM #10Web Hosting Guru
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10-17-2009, 12:20 PM #11Web Hosting Master
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well i put in a request to be moved
failing that I think dedicated is the best way, at least there will be just me, maybe slower but constant
KeithVPS & Dedi with -
UKServers (8/10) Clouvider (7/10) 12 month, Rapidswitch (1/10) 15Years+, Hivelocity (10/10) 7 Years, Clustered net (10+/10) 17Years+
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10-17-2009, 01:12 PM #12Retired Moderator
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And that is what is the problem with most VPS solutions - Memory and CPU are resources which can be defined and limited by most virtualization packages, but disk IO is something which can not be individually limited.
It should be the provider's job to address any such issues, and, just like many shared hosting providers do, guide the "abusive" customer(s) towards a product that fits his particular needs. Anything else can arguably constitute poor management.
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10-17-2009, 06:18 PM #13Web Hosting Evangelist
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Upgrading to a dedicated server is probably best.
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