Thanks Colin and also Alex and Andy.
I'm trying to determine a reasonable way to do this without reading a book
about it.
It sounds like I should use ^:replace, -server, and also -XX:-TieredCompilation
(is that right, the way I've changed + to -?), and also -XX:+AggressiveOpts.
Does it make sense to use all of these together?
And maybe I should get rid of "-XX:+UseG1GC", since I'm not really sure if
that's a good thing.
Assuming that none of those things use as big a chunk of RAM as is available, I
guess I should keep my messy code for the memory options.
So that would mean that overall I'd do the following to maximize performance on
long-running, compute-intensive, memory-intensive runs:
:jvm-opts ^:replace ~(let [mem-to-use
(long (* (.getTotalPhysicalMemorySize
(java.lang.management.ManagementFactory/getOperatingSystemMXBean))
0.8))]
[(str "-Xmx" mem-to-use)
(str "-Xms" mem-to-use)
"-server"
"-XX:-TieredCompilation"
"-XX:+AggressiveOpts"])
Seem reasonable?
Thanks for all of the help!
-Lee
> On May 14, 2015, at 8:19 PM, Colin Jones <[email protected]> wrote:
>
> I can heartily recommend Java Performance: The Definitive Guide to anyone
> interested in digging further into all the knobs you can set on the command
> line:
> http://www.amazon.com/Java-Performance-The-Definitive-Guide/dp/1449358454
>
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