On Aug 6, 2013, at 4:42 PM, Veeravadivel Duraisamy <[email protected]> wrote:
> I am running my application on a 24 core machine and I have 108 threads. I
> see a slight increase in latency with jemalloc when compared to tcmalloc. The
> jemalloc man page says by default 24*4 arenas will be created. I would like
> to increase the number of arenas to 108. What should be the value that i set
> the env variable MALLOC_CONF to?
MALLOC_CONF=narenas:108
You may actually get better performance by *decreasing* the number of arenas
though. The thread caching is pretty effective at reducing arena accesses for
most applications.
Jason
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