"CPU/Memory/MySQL Usage" WHM section has no stats

We running a few cPanel-based hosts, and for two of them "CPU/Memory/MySQL Usage " (which is very handy) at WHM are empty. It lists set of users (mysql, mailnull, set of usernames that used by suexec to start php fcgi process), but both "%CPU" and "%MEM" fields are zeroes.

I found that those two servers had not sysstat package installed (which contains sar and iostat commands) while it was installed on others. I thought maybe cpanel uses sar/iostat to collect stats. But after I installed it and restarted cpanel service, nothing changes.

Please advice.

(Also english is not my native, I`m from Russia, so If my language is broken -- sorry.)

 

Thanks namzy, I should have done "rpm -ql sysstat", it put files into /etc/cron.d...

 

I figured it out. It has nothing to do with sysstat.

Stats are being generated by dcpumon utility (see "sudo crontab -u root -l") and seems that it uses ps, top and mysql to gather stats. Some of our tech changed the PATH variable at root crontab, so dcpumon was unable to find mysql/ps/top. After setting PATH="/bin:/sbin:/usr/bin:/usr/sbin" it works again.