[HarrisonFisk]

jemalloc is the new hotness for MySQL. We are using it at Facebook (and I know percona/oracle use it for benchmarks and testing as well).

Good benchmark showing the impact of the different options:

http://www.mysqlperformanceblog.com/2012/07/05/impact-of-mem...

[thrownaway2424]

That blog makes it look like it and tcmalloc are roughly on-par. Do you think there's any possibility that FB leans toward jemalloc chiefly because the author works there, and the author of tcmalloc works at Google?

[cpeterso]

Firefox uses jemalloc, too.

[ihsw]

Redis as well.