Performance

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Revision as of 00:08, 19 October 2009 by Chi11ken (Talk | contribs)

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Running Squid on your region server as a reverse proxy to the asset server

1. Download and install the Squid Proxy from: http://www.squid-cache.org/Download/
2. Create your squid.conf configuration file.
3. Change your asset_server configuration in your OpenSim.ini to point to http://localhost:3128/
4. Start everything up!

Now assets will be cached in the squid cache on the region server, and will be served up much faster, especially on region restart.

GC_NO_EXPLICIT

Sometimes this patch applied to mono-svn has helped my sim run a lot faster and not slowly get bogged down.

$mono-svn-root$/mono

 mono/metadata/boehm-gc.c
Index: boehm-gc.c
===================================================================
--- boehm-gc.c	(revision 105684)
+++ boehm-gc.c	(working copy)
@@ -107,6 +107,10 @@
 void
 mono_gc_collect (int generation)
 {
+	static int no_explicite_gc = 0; if (no_explicite_gc==0) {if (getenv("GC_NO_EXPLICIT")) {no_explicite_gc = 1;return;} else {no_explicite_gc = 2;}} else if (no_explicite_gc==1) {
+		g_print("\n --------GC_NO_EXPLICIT \n");
+		return;
+		}
 	MONO_PROBE_GC_BEGIN (generation);
 	
 	GC_gcollect ();

Not only this, but I recompile the mono runtime:

--with-large-heap=yes

Otherwise, the Sim is limited to 3GB RAM. Probably, this second peice is more important. But still, afterwards it's worth a shot to test with both to see if there is a difference in performance:

export GC_NO_EXPLICIT=1

and

unset GC_NO_EXPLICIT

What I think, (only a guess) is that Mono starts internally GC thrashing in fishing expeditions to gaining maybe 1k of RAM at time. And by having a large heap (>3GB), it is possible might keep mono less apt to do stop world complete collections as often.

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