From: | Vivek Khera <khera(at)kcilink(dot)com> |
---|---|
To: | pgsql-general(at)postgresql(dot)org |
Subject: | Re: Shared Memory Sizing |
Date: | 2002-06-28 16:29:19 |
Message-ID: | x7ptybicyo.fsf@onceler.kciLink.com |
Views: | Raw Message | Whole Thread | Download mbox | Resend email |
Thread: | |
Lists: | pgsql-general |
>>>>> "CS" == Curt Sampson <cjs(at)cynic(dot)net> writes:
CS> For most workloads, in the long run, that will force you to do disk
CS> I/O that you would not have had to do otherwise. A single disk I/O
CS> is far more expensive than hundreds of copies between the OS buffer
CS> cache and postgres' shared memory.
It occurs to me that these two opposing factors could be plotted and
make somewhat of a line each. The ideal point would be where they
crossed.
Perhaps one day when I've got a few hours I'll copy over my large
dataset to my devel server and try to mimic the load with different
shm sizes...
--
=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=
Vivek Khera, Ph.D. Khera Communications, Inc.
Internet: khera(at)kciLink(dot)com Rockville, MD +1-240-453-8497
AIM: vivekkhera Y!: vivek_khera http://www.khera.org/~vivek/
From | Date | Subject | |
---|---|---|---|
Next Message | Varun Kacholia | 2002-06-28 16:37:30 | Re: DbVisualizer 2.1 exeptions |
Previous Message | joemono | 2002-06-28 16:26:56 | Re: Foreign Key Constraints |