Gary
Pressing "Perform GC" reduced the Used Heap figures to 14Mb and 13Mb but
I now see these climbing to new heights while the app is completely
idle. JVM and main are now both using 75Mb each and climbing. This does
not inspire confidence for an app which is sitting idle.
gvim
On 09/01/2014 06:27, Gary Trakhman wrote:
what happens to the heap if you manually trigger a GC via the button?
On Thu, Jan 9, 2014 at 12:01 AM, gvim <gvi...@gmail.com
<mailto:gvi...@gmail.com>> wrote:
Here's the date from `jvisualvm`:
JVM:
char[] 19%
java.lang.object 15.5%
java.util.TreeMap$Entry 12%
java.io.ObjectStreamClass$__WeakClassKey 11%
byte[] 11%
int[] 6%
main:
char[] 24%
byte[] 17%
java.lang.object 14%
java.util.TreeMap$Entry 10%
java.io.ObjectStreamClass$__WeakClassKey 10%
int[] 6%
Heap size: 366Mb
Used heap: 85Mb
gvim
On 09/01/2014 04:32, Gary Trakhman wrote:
you're still missing some basics about java memory management. In
another thread, I mentioned the java VM will take more memory
than it
needs, that is because it prioritizes throughput over footprint.
There
are knobs for all of that. It's not clear what's taking so much
memory,
but it's certainly not luminus or clojure. Use jvisualVM to
find out
for sure instead of comparing apples to oranges.
On Wed, Jan 8, 2014 at 4:24 PM, gvim <gvi...@gmail.com
<mailto:gvi...@gmail.com>
<mailto:gvi...@gmail.com <mailto:gvi...@gmail.com>>> wrote:
On OS X Mountain Lion I just compared the memory footprint of 3
out-of-the-box web apps in these frameworks:
Clojure/Luminus: 152Mb (JVM) + 186Mb (main) = 338Mb
Ruby/Rails: 62Mb
Elixir (Erlang)/Weber: 32Mb
I was rather shocked, to say the least. Not to troll, it
has made me
think again about deploying Clojure web apps on hosting
platforms
with modest amounts RAM. I'm sure the figures for all 3 would
increase significantly once the web apps are fleshed out
but that
probably applies equally to all 3 frameworks.
gvim
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