Even if I have a server with 16GB of ram, I must set the shared_buffer to 512MB on windows? In the wiki page they talk about 1/4 of ram, in my case that represent a shared_buffer = 4GB, that is incorrect? I have 8 GB of ram for each processor, each processor is a quad core with hyperthreading, that means 16 "processors" o something like that. Windows show 16 in task manager. If I can't configure more than 512MB of shared_buffer all other RAM is unnecessary? Thanks for your time. -----Mensaje original----- De: pgsql-performance-owner@xxxxxxxxxxxxxx [mailto:pgsql-performance-owner@xxxxxxxxxxxxxx] En nombre de Greg Smith Enviado el: jueves, 08 de septiembre de 2011 09:29 p.m. Para: pgsql-performance@xxxxxxxxxxxxxx Asunto: Re: how delete/insert/update affects select performace? On 09/08/2011 12:40 PM, Anibal David Acosta wrote: > Postgres 9.0 on windows server 2008 r2 HW is a dell dual processor > with 16gb of ram . > The general guidelines for Windows servers such as http://wiki.postgresql.org/wiki/Tuning_Your_PostgreSQL_Server recommend a fairly small setting for the shared_buffers parameters on Windows--no more than 512MB. That makes your server a bit less likely to run in the nasty checkpoint spike issues Kevin was alluding to. I don't think we've seen any reports of that on Windows. The problem is worst on Linux. -- Greg Smith 2ndQuadrant US greg@xxxxxxxxxxxxxxx Baltimore, MD PostgreSQL Training, Services, and 24x7 Support www.2ndQuadrant.us -- Sent via pgsql-performance mailing list (pgsql-performance@xxxxxxxxxxxxxx) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-performance -- Sent via pgsql-performance mailing list (pgsql-performance@xxxxxxxxxxxxxx) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-performance
