crons - slow server - performance issues on one server

sahostking

Well-Known Member
May 15, 2012
389
16
68
Cape Town, South Africa
cPanel Access Level
Root Administrator
Twitter
Hi,

Usually load is around 0.58 to 1.5

But for some reason at times it goes up alot and reaches the 40.0

I'm thinking it's some crontab as it doesn't seem to be a slow query as from what I can see.

Can someone inform me if there is anything I do not need in the below list or if anything should be adjusted for performance wise. I've pasted a few of our crons below:

Code:
0 6 * * * /usr/local/cpanel/scripts/exim_tidydb > /dev/null 2>&1
30 5 * * * /usr/local/cpanel/scripts/optimize_eximstats > /dev/null 2>&1
35 * * * * /usr/bin/test -x /usr/local/cpanel/bin/tail-check && /usr/local/cpanel/bin/tail-check
45 */4 * * * /usr/bin/test -x /usr/local/cpanel/scripts/update_mailman_cache && /usr/local/cpanel/scripts/update_mailman_cache
0 3 * * * /usr/bin/test -x /usr/local/cpanel/scripts/update_db_cache && /usr/local/cpanel/scripts/update_db_cache
30 */2 * * * /usr/local/cpanel/bin/mysqluserstore >/dev/null 2>&1
15 */2 * * * /usr/local/cpanel/bin/dbindex >/dev/null 2>&1
15 */6 * * * /usr/local/cpanel/scripts/autorepair recoverymgmt >/dev/null 2>&1
4 3 * * * /usr/local/cpanel/whostmgr/docroot/cgi/cpaddons_report.pl --notify
2,17,32,47 * * * * /usr/local/cpanel/whostmgr/bin/dnsqueue > /dev/null 2>&1
0 7 * * * perl /var/cpanel/rvglobalsoft/rvsitebuilder/rvsBackup.pl 'backup' > /dev/null
*/5 * * * * /usr/local/cpanel/bin/dcpumon >/dev/null 2>&1
30 1 * * * /usr/local/bin/rkhunter -c --cronjob --update --rwo
56 5 * * * /usr/local/cpanel/whostmgr/docroot/cgi/rvsitebuilderinstaller/autoinstaller.cgi
0 4 * * * /usr/sbin/cxs --upgrade --quiet
0 0 * * 0 rm -rf /usr/local/apache/logs/archive/*.gz
2,58 * * * * /usr/local/bandmin/bandmin
0 0 * * * /usr/local/bandmin/ipaddrmap
0 4 6 * * /usr/local/cpanel/scripts/upcp --cron

I noticed this cron ran every 4 hours so I changed it to run only in the early hours of the morning and changed it to the below:
Code:
0 3 * * * /usr/bin/test -x /usr/local/cpanel/scripts/update_db_cache && /usr/local/cpanel/scripts/update_db_cache
 

cPanelMichael

Administrator
Staff member
Apr 11, 2011
47,908
2,216
463
Hello :)

The following cron jobs are not standard, so you could start by temporarily disabling them to see if it makes a difference:

Code:
0 7 * * * perl /var/cpanel/rvglobalsoft/rvsitebuilder/rvsBackup.pl 'backup' > /dev/null
30 1 * * * /usr/local/bin/rkhunter -c --cronjob --update --rwo
56 5 * * * /usr/local/cpanel/whostmgr/docroot/cgi/rvsitebuilderinstaller/autoinstaller.cgi
0 4 * * * /usr/sbin/cxs --upgrade --quiet
0 0 * * 0 rm -rf /usr/local/apache/logs/archive/*.gz
Note that some of them might be required for your third-party applications to function properly. Also, please see this thread:

Troubleshooting High Loads On Linux Systems

Thank you.