Hi, I run multiple solr indexes in 1 single tomcat (1 webapp per index). All the indexes are solr 3.5 and I have upgraded few of them to solr 4.1 (about half of them).
The JVM behavior is now radically different and doesn't seem to make sense. I was using ConcMarkSweepGC. I am now trying the G1 collector. The perm gen went from 410Mb to 600Mb. The eden space usage is a lot bigger and the survivor space usage is 100% all the time. I don't really understand what is happening. GC behavior really doesn't seem right. My jvm settings: -d64 -server -Xms40g -Xmx40g -XX:+UseG1GC -XX:NewRatio=1 -XX:SurvivorRatio=3 -XX:PermSize=728m -XX:MaxPermSize=728m I have tried NewRatio=1 and SurvivorRatio=3 hoping to get the Survivor space to not be 100% full all the time without success. Here is what jmap is giving me: Heap Configuration: MinHeapFreeRatio = 40 MaxHeapFreeRatio = 70 MaxHeapSize = 42949672960 (40960.0MB) NewSize = 1363144 (1.2999954223632812MB) MaxNewSize = 17592186044415 MB OldSize = 5452592 (5.1999969482421875MB) NewRatio = 1 SurvivorRatio = 3 PermSize = 754974720 (720.0MB) MaxPermSize = 763363328 (728.0MB) G1HeapRegionSize = 16777216 (16.0MB) Heap Usage: G1 Heap: regions = 2560 capacity = 42949672960 (40960.0MB) used = 23786449912 (22684.526359558105MB) free = 19163223048 (18275.473640441895MB) 55.382144432514906% used G1 Young Generation: Eden Space: regions = 674 capacity = 20619198464 (19664.0MB) used = 11307843584 (10784.0MB) free = 9311354880 (8880.0MB) 54.841334418226204% used Survivor Space: regions = 115 capacity = 1929379840 (1840.0MB) used = 1929379840 (1840.0MB) free = 0 (0.0MB) 100.0% used G1 Old Generation: regions = 732 capacity = 20401094656 (19456.0MB) used = 10549226488 (10060.526359558105MB) free = 9851868168 (9395.473640441895MB) 51.70911985792612% used Perm Generation: capacity = 754974720 (720.0MB) used = 514956504 (491.10079193115234MB) free = 240018216 (228.89920806884766MB) 68.20844332377116% used The Survivor space even went up to 3.6Gb but was still 100% used. I have disabled all caches. Obviously I am getting very bad GC performance. Any idea as to what could be wrong and why this could be happening? Thanks, Marc This transmission is strictly confidential, possibly legally privileged, and intended solely for the addressee. Any views or opinions expressed within it are those of the author and do not necessarily represent those of 192.com Ltd or any of its subsidiary companies. If you are not the intended recipient then you must not disclose, copy or take any action in reliance of this transmission. If you have received this transmission in error, please notify the sender as soon as possible. No employee or agent is authorised to conclude any binding agreement on behalf 192.com Ltd with another party by email without express written confirmation by an authorised employee of the company. http://www.192.com (Tel: 08000 192 192). 192.com Ltd is incorporated in England and Wales, company number 07180348, VAT No. GB 103226273.
