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RE: Performance

From: Brian Behlendorf
Subject: RE: Performance
Date: Sat, 16 Dec 2000 17:47:18 -0800 (PST)

On Thu, 14 Dec 2000, Pyatt, Scott wrote:
> Bottlenecks to the CVS server are usually, in order of severity, network,
> disk I/O and finally CPU (sometimes memory).  Having a good admin that can
> monitor what is happening and make the appropriate tuning tweaks and
> recommendations is invaluable.

Actually, you'll probably hit I/O long before you hit network or
CPU.  We found, at least using pserver, that making /tmp (or wherever
pserver will place its temp files) a memory-backed FS was much faster than
when it was disk-based, as pserver makes a copy of everything it's about
to send to /tmp, and that means making lots of small files very quickly,
then deleting them.  One optimization to pserver IMHO would be to have it
build a single file to transfer instead of lots of small ones, if that is


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