From: | "scott(dot)marlowe" <scott(dot)marlowe(at)ihs(dot)com> |
---|---|
To: | Richard Huxton <dev(at)archonet(dot)com> |
Cc: | Alex Madon <alex(dot)madon(at)bestlinuxjobs(dot)com>, <pgsql-general(at)postgresql(dot)org> |
Subject: | Re: postgresql + apache under heavy load |
Date: | 2004-01-21 20:55:13 |
Message-ID: | Pine.LNX.4.33.0401211352470.21457-100000@css120.ihs.com |
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Thread: | |
Lists: | pgsql-general |
On Wed, 21 Jan 2004, Richard Huxton wrote:
> [I noticed you were running X and mozilla (on top of gnome?). If you don't
> need them, close them - that can free up to 64MB, depending on what you're
> running]
Note that if you've got a 64 Meg memory video card, and X uses 4 megs of
system ram, it will show, in linux, as using 68 Megs of ram. Turning off
X, however, will only free up the 4 megs of system ram, not the 64 on the
video card. so, it's not uncommon for folks to see a modern video card in
their system, look at top, and go "geeze, X is a total memory hog" when in
fact it's just that linux / top count the video memory as part of the
memory allocated to X.
That said, I'd at least run a less heavyweight window manager like
afterstep or twm, not gnome or kde on a box like that one.
> I don't think you've got a RAM shortage, I think your settings are too small
> and you're running out of I/O bandwidth. If you run "vmstat 5", what does it
> show - you're interested in the i/o section: blocks in (bi) and out (bo) as
> well as memory.
Also, look at si/so (swap in and out) to monitor swap activity. If those
numbers are low, then swapping isn't an issue...
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