I have a WordPress site hosted on a VPS Centos5_x64_cpanel system with 1Gb of memory.
Recently I have been having a lot of issues with the site performance and emails from the hosting company stating that the server overloads.
Today I got this email:
We have reboot the VPS ##.##.###.### , as it overload again
Normal: empty
HighMem: empty
50559 pagecache pages
Swap cache: add 20318560, delete 20312638, find 3426118/4492729, race 2780+11340
Free swap = 0kB
Total swap = 2097144kB
I also get this email quite a few times a day:
The chkservd sub-process with pid 11939 ran for 4949 seconds. This sub-process was terminated when it exceeded the time allowed between checks, which is 600 seconds. To determine why, you can check /var/log/chkservd.log and /usr/local/cpanel/logs/tailwatchd_log.
You likely received this notification as a symptom of a larger problem. If your server is experiencing a high load, we recommend investigating the cause. If you continue to receive this notification, it is likely that your system is unable to handle demand or a misconfiguration is delaying restarts.
If you are sure that no misconfigurations exist, you should consider gradually increasing the following options in WHM's "Tweak Settings" feature: "The number of times ChkServd will allow a previous check to complete before terminating the check" and/or "The number of seconds between ChkServd service checks".
Server: ###.#########.##
Primary IP: ##.##.###.###
Service: chkservd
Notification Type: hang
Memory Information:
Used: 820MB
Available: 208MB
Installed: 1024MB
Load Information: 76.53 75.24 80.24
Uptime: 0 days, 8 hours, 14 seconds
IOStat Information:
avg-cpu: %user %nice %system %iowait %steal %idle
1.97 0.01 0.80 13.19 0.01 84.02
Device: tps Blk_read/s Blk_wrtn/s Blk_read Blk_wrtn
sda1 18.57 360.59 132.67 10712202 3941360
sda2 422.54 995.39 2497.02 29570128 74179496
ChkServd Version: 15.1
The site is nothing special and has a few plugins installed.
I suspect that it could be a plugin causing the excessive memory usage. I am fairly new to WHM so is there a way or a log file I can check to see what is using all the memory. If so where would I look and are there any tests I can run to check if it is a plugin and which plugin it is.
Thank you
Best Answer
I can only think of a Hit and Trial test for this, as I don't think there any any tool which can tell you which specific plugin is using the memory.
For this, you can run the top command on the server, and start disabling your plugins one by one.
As soon as you hit the specific plugin, you will notice the RAM getting free up. That is the only way I can think of right now for checking the memory issue for plugin.