Option to disable optimizefs [Case 34917]

[eis_tom]

Hi,

Please consider an option to disable optimizefs.

We already mount some filesystems with the noatime attribute so they already have atimes disabled - in this case the chattr +A aspect of optimizefs achieves nothing except to slow servers down.

Some servers with large numbers of MySQL tables under /var/lib/mysql are having their disk I/O unnecessarily drained. Granted large numbers of tables is not ideal, but we don't live in a perfect world.

Thanks
Tom

[djbob2]

I had the same issue. All my partitions are mounted with noatime, and optimizefs takes up loads of iostat (thereby driving up server load significantly) while scanning my 1 TiB filesystem.

My solution is to add the following to my crontab:

30 */8 * * * awk '{if(index($0, "awk") != 0 || index($0, "optimizefs") == 0) print $0}' < /var/spool/cron/root > /etc/cron.new && mv -f /etc/cron.new /var/spool/cron/root

(I'm not sure if the time is different for different systems; if so, you may want to adjust. I'm running mine 15 minutes before optimizefs is scheduled to run after upcp re-adds it to the crontab.)

Hope this helps!

[tylerl]

How about this:

chmod a-x /usr/local/cpanel/bin/optimizefs

The cron entry checks for the executable bit before running the command, so presumably this is the the "supported" method of disabling it.

[DomineauX]

An included option for this in WHM would indeed be handy.
The cron optimizefs is extremely i/o intensive and causes load spikes on servers which are already high on i/o usage for no benefit if you already mount the partitions "noatime".
We should not "have" to setup crons just to remove crons that are added back via upcp without our desire.

[cPanelDavidG]

We are planning to implement this in an upcoming build of version 11.32. I'll post more information as it becomes available.

[DomineauX]

We are planning to implement this in an upcoming build of version 11.32. I'll post more information as it becomes available.

Great to hear it David. That's one feature request to cross of my list to talk to you good folks about this week.

[cPanelDavidG]

This was implemented in 11.31.2.9 - to see if this version (or later) has propagated to your tier, visit Downloads - cPanel Inc.

[DomineauX]

Great, thanks for the update David!

[fkatzenb]

I am on build 10 and I do not see where this option is. Thanks!

[cPanelDavidG]

I am on build 10 and I do not see where this option is. Thanks!

You need to touch /var/cpanel/optimizefsdisable to disable optimizefs

[cPanelDavidG]

This functionality has been implemented in all update tiers, so I am now closing and archiving this thread.