Hardware Performance Tuning
The doc "PostgreSQL Hardware Performance Tuning" by Bruce Momjian, 16th
January 2003 says: "As a start for tuning, use 25% of RAM for cache size,
and 2-4% for sort size.", and "The default POSTGRESQL conguration allocates
64 shared buffers. Each buffer is 8 kilobytes.".
Have I understood it correctly that "shared_buffers" should be set to 25%
of RAM divided by 8kB, and "sort_mem" to 2-4% of RAM? (If so, the default
values of 64 and 512 respectively, appear relatively small).
Thanks, KP
I need to update that. 7.4 will use many more shared buffers by
default.
Yes, they are very small because we want to start even on small machines.
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Knut P. Lehre wrote:
The doc "PostgreSQL Hardware Performance Tuning" by Bruce Momjian, 16th
January 2003 says: "As a start for tuning, use 25% of RAM for cache size,
and 2-4% for sort size.", and "The default POSTGRESQL conguration allocates
64 shared buffers. Each buffer is 8 kilobytes.".
Have I understood it correctly that "shared_buffers" should be set to 25%
of RAM divided by 8kB, and "sort_mem" to 2-4% of RAM? (If so, the default
values of 64 and 512 respectively, appear relatively small).Thanks, KP
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