Question regarding jemalloc and JVM

[Jason Evans]

On Mar 23, 2012, at 4:21 PM, Vijay wrote:
> Is there any reason i should not be using LD_PRELOAD to force JVM use jemalloc instead of native gcc malloc?
> Background: This is for Apache-Cassandra we do off-heap cache where we explicitly call malloc and free and by using jemalloc we see a fair amount of space savings and was wondering if there is anything which we have to consider before using it.

LD_PRELOAD'ing jemalloc should be okay as long as the JVM doesn't statically link a different malloc implementation.  I expect that if it isn't safe, you'll experience crashes quite early on, so give it a try and see what happens.

Jason