Invalid conf pair

Jason Evans jasone at
Thu Mar 17 10:45:32 PDT 2016

On Mar 17, 2016, at 9:17 AM, Jeffery Griffith <jeffery.griffith at> wrote:
> My first attempt at trying to integrate jemalloc and I can't get out of the starting blocks :-)  From what I read, it seems that I should be able to get jemalloc into the JVM with LD_PRELOAD and MALLOC_CONF as used below. I took the examples straight from the wiki but I must be missing something incredibly basic. I built the .so straight from the download with no problems (version 4.0) and my JVM does seem to run with it with no problem (radically lower virtual size and i can see the .so is loaded with pmap), but I clearly don't know what the hell I'm doing with MALLOC_CONF.
> jgriffith at mydevbox.c1.:~/JEMALLOC$ echo $LD_PRELOAD
> /usr/local/lib/
> jgriffith at mydevbox.c1.:~/JEMALLOC$ echo $MALLOC_CONF
> prof:true,lg_prof_interval:30,lg_prof_sample:17
> jgriffith at mydevbox.c1.:~/JEMALLOC$ java -jar allocmemory.jar 
> <jemalloc>: Invalid conf pair: prof:true
> <jemalloc>: Invalid conf pair: lg_prof_interval:30
> <jemalloc>: Invalid conf pair: lg_prof_sample:17
> [...]

It looks like you didn't specify --enable-prof to the configure script.


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