Re: kswapd 100%, swap full, vm.swappiness=0

From: Scott Marlowe <scott(dot)marlowe(at)gmail(dot)com>
To: Allan Kamau <kamauallan(at)gmail(dot)com>
Cc: pgsql-general(at)postgresql(dot)org
Subject: Re: kswapd 100%, swap full, vm.swappiness=0
Date: 2010-10-07 19:49:46
Message-ID: AANLkTimC5y+PUyCpOd=zFb75m_DAMhavXbhU1BGUXAy-@mail.gmail.com
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On Thu, Oct 7, 2010 at 1:46 PM, Allan Kamau <kamauallan(at)gmail(dot)com> wrote:

> My wild guess is that Ubuntu may be to blame. Try restarting PG and
> chances are that it would not solve the problem, meaning that it is
> most likely an OS issue. I had similar experiences on PostgreSQL
> server hosted on Ubuntu. After a couple of days having the computer
> running "free -g" would display no (or a very few) free GBs of RAM.
> With Fedora I have not noticed this problem. For some reason I seem to
> have issues with Ubuntu/Kubuntu but not Fedora.

I definitely would tend to agree, but I'm more suspicious of a late
model kernel than the specific distro. Note that this machine has 60
days of uptime with no behaviour like this before. For now I'm just
running it with swap turned off. It's got 128Gig of ram, if it runs
out of that I've got other problems. :)
--
To understand recursion, one must first understand recursion.

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