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Re: Increased I/O / Writes

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On Tue, May 17, 2016 at 12:11 AM, Lucas Possamai <drum.lucas@xxxxxxxxx> wrote:
> This is my postgresql.conf at the moment:
>
> shared_buffer(51605MB) +
> effective_cache_size(96760MB) +
> work_mem(32MB) +
> max_connections(200)
>
> = 148397.08 MB

You are comparing some very dissimilar settings.  effective_cache_size
does not allocate memory, it tells the planner how much cache you have
allocated (i.e., the sum of shared_buffers and the OS cache).
work_mem can be allocated zero to a large number of times per active
query.  Every open connection will use some RAM, but the amount is
hard to predict exactly.

You might want to go over this page:

https://wiki.postgresql.org/wiki/Tuning_Your_PostgreSQL_Server

... and then read the documentation of any setting you are thinking of
adjusting.

-- 
Kevin Grittner
EDB: http://www.enterprisedb.com
The Enterprise PostgreSQL Company


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