Release free memory with jemalloc

[Jason Evans]

On Oct 16, 2015, at 4:16 AM, Tigran Sarukhanyan <sstigran at hotmail.com> wrote:
> I am trying to use jemalloc for our application. The application has such engines that use lots of memory and it is considerable to free memory back to the operating system for reuse. We use Google's MallocExtension::ReleaseFreeMemory implemented in tcmalloc after finishing such engines.
> 
> Is there a way to do this with jemalloc?

Yes, you can do a similar thing with jemalloc.  Take a look at the manual page, in particular:

	http://www.canonware.com/download/jemalloc/jemalloc-latest/doc/jemalloc.html#arena.i.purge
	http://www.canonware.com/download/jemalloc/jemalloc-latest/doc/jemalloc.html#thread.tcache.flush

There are numerous other approaches that may be more appropriate for your application, so it's worth skimming the entire manual page for ideas.

Jason