max_fsm_pages, shared_buffers and checkpoint_segments - Mailing list pgsql-performance

From Y Sidhu
Subject max_fsm_pages, shared_buffers and checkpoint_segments
Date
Msg-id b09064f30705230922j35a69ea4ie5ff38d63d199065@mail.gmail.com
Whole thread Raw
Responses Re: max_fsm_pages, shared_buffers and checkpoint_segments
Re: max_fsm_pages, shared_buffers and checkpoint_segments
Re: max_fsm_pages, shared_buffers and checkpoint_segments
List pgsql-performance
I am a newbie, as you all know, but I am still embarassed asking this question. I started my tuning career by changing shared_buffers. Soon I discovered that I was hitting up against the available RAM on the system. So, I brought the number down. Then I discovered max_fsm_pages. I could take that up quite high and found out that it is a 'disk' thing. Then I started increasing checkpoint_segments,which is also a disk thing. However, setting it to 25, and then increasing any of the other 2 variables, the postgresql daemon stops working. meaning it does not start upon reboot. When I bring shared_buffers or max_fsm_pages back down, the daemon starts and all is normal. This happens on a 1 GB RAM machine and a 4 GB RAM machine.

Anyone know what I am doing wrong?

System:  FreeBSD 6.1, Postgresql 8.09, 2 GB RAM

--
Yudhvir Singh Sidhu
408 375 3134 cell

pgsql-performance by date:

Previous
From: Rigmor Ukuhe
Date:
Subject: Re: LIKE search and performance
Next
From: Ben
Date:
Subject: Re: max_fsm_pages, shared_buffers and checkpoint_segments