Re: proposal: Set effective_cache_size to greater of .conf value, shared_buffers - Mailing list pgsql-hackers

From Tom Lane
Subject Re: proposal: Set effective_cache_size to greater of .conf value, shared_buffers
Date
Msg-id 20465.1399395043@sss.pgh.pa.us
Whole thread Raw
In response to Re: proposal: Set effective_cache_size to greater of .conf value, shared_buffers  (Simon Riggs <simon@2ndQuadrant.com>)
List pgsql-hackers
Simon Riggs <simon@2ndQuadrant.com> writes:
> On 6 May 2014 15:18, Tom Lane <tgl@sss.pgh.pa.us> wrote:
>> Simon Riggs <simon@2ndQuadrant.com> writes:
>>> Lets fix e_c_s at 25% of shared_buffers and remove the parameter
>>> completely, just as we do with so many other performance parameters.

>> Apparently, you don't even understand what this parameter is for.
>> Setting it smaller than shared_buffers is insane.

> You know you can't justify that comment and so do I.

What I meant is that your comments indicate complete lack of understanding
of the parameter.  It's *supposed* to be larger than shared_buffers, and
there is no "safety risk" involved in setting it too high.
        regards, tom lane



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