bpurcell.org - FAQ on JVM Garbage Collection
Calendar
SunMonTueWedThuFriSat
  1 2 3 4 5 6
7 8 9 10 11 12 13
14 15 16 17 18 19 20
21 22 23 24 25 26 27
28 29 30 31      

Subject Archives
Amazon EC2 (15)
ColdFusionMX (155)
Corvette (3)
Flash Lite (4)
Flash Media Server (5)
Flash Player (3)
Flex (39)
General Web Dev (14)
HDTV (3)
Jboss (1)
Jquery (2)
JRun (59)
Max 2003 (3)
Other (33)
PC Hardware (16)
Software (17)
SpatialKey (7)
Wireless (8)
Working Out (1)

RSS Feed
Feed Listing

Site Contents
Home
My Blog
ColdFusion
JRun
Flex
Wireless & Networking
Hardware & Gadgets
HDTV
Software Picks
Pictures
Contact Me
Search


My Articles & Papers
Flex Performance
Server/Client
mm.com Under the Hood
Multiple Instances of CFMX
Multiple Instance Config
NLB with ColdFusion
Clustering CFMX for J2EE
Multi-Tier Hardware LB w CFMX
Cisco CSS & Coldfusion MX
JRun 4 Jini based Clustering
WiFi Growth

2ID Tacweb

Other Hobbys
Body-For-Life Challenge

Personal Projects
Family Pool
Deck Gate

username:
password:
 

 
Viewing Individual Entry / Main
November 17, 2003
I make some references to Garbage Collection Tuning in my Performance Tuning and Monitoring Coldfusion or JRun. Beyond that there are many references available on GC tuning.  One that I find interesting is the "Frequently Asked Questions about Garbage Collection in the HotspotTM JavaTM Virtual Machine" article on the Sun website.  Make sure you fully load test any JVM argument that you try. I have ran into some that have had major side effects, from stability problems to uncontrolled memory growth.

Comments

I have been struggling with Performance tuning and these runtime paramters. It all began when we started getting 503 errors which crashed the server, the culprit was long-running queries with many rows. I think this issue is fixed with upgrading the the latest JVM (still get OutOfMemory errors but it doesn't break the connection to Apache). I've noticed that RAM gets stuck in JRUN just for long looping calculations or outputs (that aren't even being cached). What I'm really trying to do is free up these dead objects or increase the frequency of garbage collection. Please help.

Thanks, Craig


You can try starting here http://www.robisen.com/index.cfm?mode=entry&entry=FD4BE2FC-55DC-F2B1-FED0717CC1C7E0AF


 
Page Render Time:203