> -----Original Message-----
> From: Darius D. [mailto:darius.ski@gmail.com]
> Sent: Saturday, September 03, 2011 1:36 PM
>
> As a side note - (CPU)cache/TLB misses have nothing to do with heap size.
> Too big heap size can be as bad as too low ( by stealing memory from OS that could
> have been used for file caches and other apps and increasing GC pauses ).
The Linux JVM has a nice option -XX:+UseLargePages to help avoid TLB misses on heap accesses.
It's good for modest gains, and has the side effect of locking the heap into memory. I tend
to use it on systems with large heaps.
Not much you can do about cache misses though, besides getting processors with more cache.
-Jeff
---------------------------------------------------------------------
To unsubscribe, e-mail: users-unsubscribe@tomcat.apache.org
For additional commands, e-mail: users-help@tomcat.apache.org
|