I read some articles about the CPU load average. They were talking about the definition, the differences between the CPU usage, and the optimal value (roughly equals to the number of cores).
If you have like... 10 cores... and you use Apache and your load average is always under 5.0...
Would it slow your site any if you lowered to 6 cores?
(assuming you never reached any spikes that hit 6.0 in load)
Specs:
Xen, 10 Cores at 2.0GHz, CentOS 5 64bit, using "uptime" to find load averages.
By running top, htop, uptime, etc. we can see the load average as three values indicating the average load for the last 1/5/15 minutes (well not really, but that isn't the question here).
Sometimes I'll notice that I have a fairly high load average for the last 15 minutes, but the current load is very low.
I had the query as to whether the load average in a multi CPU machine should be
(load average/no of CPUs)
We have 4 CPU on our VMware RHEL instance, so the load average should be
Load average/4.
I hope, my question is clear.
Please revert with the reply to my query.
Regards
Load Average on a server reflects the current state of the server. Higher the load average, poorer is the server performance. The following shell script monitors the load average on the Linux server and inform the server administrator with the current running processes if the load average is greater than the defined threshold.
Create a file, [...]
Desktop00:05:08 up 2 days, 8:13, 2 users, load average: 0.25, 0.10, 0.07Laptop <- just started a live cd23:05:27 up 5 min, 6 users, load average 0.09, 0.09, 0.05Server00:07:56 up 19 days, 13:55, 1 user, load average: 0.00, 0.01, 0.05Firewall00:48:55 up 1 day, 12:24, 1 user, load average: 0.00, 0.01, 0.05
George.Harmony
https://bbs.archlinux.org/profile.php?id=36546
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We have server with high traffic website.
Recently we moved from
2 x 4 core server (8 cores in /proc/cpuinfo), 32 GB RAM, running CentOS 5.x, to
2 x 4 core server (16 cores in /proc/cpuinfo), 32 GB RAM, running CentOS 6.3
Server running nginx as a proxy, mysql server and sphinx-search.
Traffic is high, but mysql and sphinx-search databases are relatively small, and usually everything works bl
A Drupal 7 site with CiviCRM, after running smoothly for a year on a 1&1 VPS suddenly became unresponsive. Now pages eventually load, but can take more than a minute.
Looking at resource use in Virtuozzo, the load average carries a warning, and has remained above 1. While I understand this isn't particularly high, this is a change from when the site was working.
I have a Xeon E3-1230 processor, which has 4 physical cores, but has hyperthreading so an operating system running on it sees 8 logical cores.
I installed VMware ESXi and am creating virtual machines to run on it.
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