on linux: only one cpu in use?

[Tollef Fog Heen]

]] 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!
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