RFR(XS): 8193521: glibc wastes memory with default configuration

Andrew Haley aph at redhat.com
Thu Dec 14 18:01:30 UTC 2017

On 14/12/17 16:00, Doerr, Martin wrote:
> I'm not aware of performance critical concurrent malloc usages in the JVM. Maybe somebody else is?
> Comments are welcome. I will also need a sponsor if this change is desired.

Is this something that a JVM should decide?  I would have thought it's
for the user of the system to decide policy.  They can set
MALLOC_ARENA_MAX on a system-wide basis if they really need to save
memory, or just for Java.  Or are you suggesting that Java is so
unusual that it justifies overriding a user's settings?

If a user has explicitly set MALLOC_ARENA_MAX, don't futz with it.

Andrew Haley
Java Platform Lead Engineer
Red Hat UK Ltd. <https://www.redhat.com>
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