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Optimize ZFS kernel settings

Authored by dereckson on Nov 8 2017, 23:29.

Description

Optimize ZFS kernel settings

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

Reviewers: dereckson

Reviewed By: dereckson

Maniphest Tasks: T1268

Differential Revision: https://devcentral.nasqueron.org/D1184

Details

Committed
derecksonNov 8 2017, 23:29
Pushed
derecksonNov 8 2017, 23:29
Reviewer
dereckson
Differential Revision
D1184: Optimize ZFS kernel settings
Parents
rOPSe98b274c14b3: Kernel state configuration
Branches
Unknown
Tags
Unknown
Tasks
T1268: Reprovision Ysul