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List: varnish-misc
Subject: on linux: only one cpu in use?
From: tfheen () linpro ! no (Tollef Fog Heen)
Date: 2008-09-29 12:12:16
Message-ID: 87ej33m9r3.fsf () qurzaw ! linpro ! no
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]] Sascha Ottolski
| Am Montag 15 September 2008 16:16:33 schrieb Tollef Fog Heen:
| > ]] Sascha Ottolski
| >
| > | it's debian etch with the stock 2.6.18 kernel. performance is ok,
| > | beside the fact that the load climbs up when the cache is about
| > | 40-50 % full (with a 517GB cache file); below 40 % the load stays
| > | below 3, but after that level it rises to over 7 and even 10 at
| > | peak times. the response times are still good, though.
| >
| > Is this with the mmap or the malloc backend?
|
| well, as the man page says about malloc "Not recommended for production
| use.", I use the file backend :-)
Indeed. Fixed that just now. It seems like newer kernels has some
performance problems we are tickling. I haven't had the time to track
down which commit breaks us, but it's fairly noticeable on busy sites.
| In case it matters, it's with trunk r2640.
This is fairly old, though.
--
Tollef Fog Heen
Redpill Linpro -- Changing the game!
t: +47 21 54 41 73
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