On Wed, Sep 11, 2013 at 12:27 PM, Bruce Momjian <br...@momjian.us> wrote: >> > Another argument in favor: this is a default setting, and by default, >> > shared_buffers won't be 25% of RAM. >> >> So, are you saying you like 4x now? > > Here is an arugment for 3x. First, using the documented 25% of RAM, 3x > puts our effective_cache_size as 75% of RAM, giving us no room for > kernel, backend memory, and work_mem usage. If anything it should be > lower than 3x, not higher.
AFAIK, e_c_s must include shared_buffers, so 25% + 75% = 75% And your statement seems to assume 25% + 75% = 100%. Which isn't universally true, no matter what your math teacher probably taught you ;-) -- Sent via pgsql-hackers mailing list (pgsql-hackers@postgresql.org) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-hackers
