From: Tom Lane <tgl@sss.pgh.pa.us>
To: Jignesh K. Shah <J.K.Shah@Sun.COM>
Cc: Josh Berkus <josh@agliodbs.com>
Cc: pgsql-performance@postgresql.org, Alvaro Herrera <alvherre@commandprompt.com>
Subject: Re: User concurrency thresholding: where do I look?
Date: Fri, 20 Jul 2007 14:23:51 -0400
Message-ID: <12002.1184955831@sss.pgh.pa.us> (raw)
In-Reply-To: <46A0FA31.2080208@sun.com>
References: <200707190828.59088.josh@agliodbs.com>
<200707191819.13899.josh@agliodbs.com>
<15685.1184895926@sss.pgh.pa.us>
<200707192138.39679.josh@agliodbs.com>
<46A0FA31.2080208@sun.com>
"Jignesh K. Shah" <J.K.Shah@Sun.COM> writes:
> There are no hard failures reported anywhere. Log min durations does
> show that queries are now slowing down and taking longer.
> OS is not swapping and also eliminated IO by putting the whole database
> on /tmp
Hmm. Do you see any evidence of a context swap storm (ie, a drastic
increase in the context swaps/second reading reported by vmstat)?
regards, tom lane
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Reply to all the recipients using the --to and --cc options:
reply via email
To: pgsql-performance@postgresql.org
Cc: tgl@sss.pgh.pa.us, J.K.Shah@Sun.COM, josh@agliodbs.com, alvherre@commandprompt.com
Subject: Re: User concurrency thresholding: where do I look?
In-Reply-To: <12002.1184955831@sss.pgh.pa.us>
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
This inbox is served by DDX for PostgreSQL; see mirroring instructions
for how to clone and mirror all data and code used for this inbox