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Optimize ZFS kernel settings
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Authored by dereckson on Nov 6 2017, 22:49.

Details

Summary

Always require prefetch: our lower RAM server is 4G, reporting 4073M,
and so disabling prefetch (as 4096M are required).

For low RAM servers, limit ZFS ARC to 2G: that allows InnoDB to use RAM too.
That allows 1G InnoDB, 2G I/O and to keep 1G for other applications.

References:

Ref T1268

Test Plan

Watch Ysul performances in November

Diff Detail

Repository
rOPS Nasqueron Operations
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Automatic diff as part of commit; lint not applicable.
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Event Timeline

dereckson created this revision.Nov 6 2017, 22:49
dereckson accepted this revision.Nov 6 2017, 22:50
dereckson edited the summary of this revision. (Show Details)
This revision is now accepted and ready to land.Nov 6 2017, 22:51
dereckson updated this revision to Diff 3032.Nov 6 2017, 22:54
dereckson edited the summary of this revision. (Show Details)

Fix syntax: = assignment operator shouldn't be enclosed by spaces

dereckson updated this revision to Diff 3034.Nov 8 2017, 23:28

Apply D1185 last change (format using 'key = value')

This revision was automatically updated to reflect the committed changes.