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From "Robert Stupp (JIRA)" <>
Subject [jira] [Commented] (CASSANDRA-8714) row-cache: use preloaded jemalloc w/ Unsafe
Date Sat, 07 Feb 2015 08:50:35 GMT


Robert Stupp commented on CASSANDRA-8714:

I just wanted to benchmark allocation performance - and not accessing memory since that would
add a constant overhead to the comparison. Maybe it would also add some "negative" value to
the bigger systems (c3/c4).

But this is an artificial benchmark. To benchmark a "real scenario" I'd had to allocate more
memory, keep memory allocated, use different allocation sizes and so on. IMO that's too heavy
for a JMH.

Yea - maybe it's really the thing that JNI is more optimized.

> row-cache: use preloaded jemalloc w/ Unsafe
> -------------------------------------------
>                 Key: CASSANDRA-8714
>                 URL:
>             Project: Cassandra
>          Issue Type: Sub-task
>            Reporter: Robert Stupp
>            Assignee: Robert Stupp
>             Fix For: 3.0
>         Attachments: 8714.txt
> Using jemalloc via Java's {{Unsafe}} is a better alternative on Linux than using jemalloc
via JNA.

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