Re: JVM Options for Production

2010-06-15 Thread Jonathan Ellis
The main change you'd commonly make is decreasing the max new gen size on large heaps (say to 2GB) from the default of 1/3 of the heap. IMO keeping heap dump on OOM around is a good idea in production; it doesn't cost much (you're already screwed at the point where it starts writing a dump, so why

Re: JVM Options for Production

2010-06-15 Thread Ted Zlatanov
On Mon, 14 Jun 2010 16:01:57 -0700 Anthony Molinaro wrote: AM> Now I would assume that for 'production' you want to remove AM>-ea AM> and AM>-XX:+HeapDumpOnOutOfMemoryError AM> as well as adjust -Xms and Xmx accordingly, but are there any others AM> which should be tweaked? Is there a

Re: JVM Options for Production

2010-06-14 Thread Benjamin Black
"...or does it very greatly from installation to installation?" Yes.

JVM Options for Production

2010-06-14 Thread Anthony Molinaro
Hi, I was updating to a newer 0.6.3 and happened to remember that I noticed back in 0.6.2 there's this change in CHANGES.txt * improve default JVM GC options (CASSANDRA-1014) Looking at that ticket, I don't actually see the options listed or a reason for why they changed. Also, I'm not certa