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From "Marc Des Garets" <>
Subject update solr index
Date Mon, 11 Jan 2010 14:12:02 GMT

I am running solr in tomcat and I have about 35 indexes (between 2 and
80 millions documents each). Currently if I try to update few documents
from an index (let's say the one which contains 80 millions documents)
while tomcat is running and therefore receiving requests, I am getting
few very long garbage collection (about 60sec). I am running tomcat with
-Xms10g -Xmx10g -Xmn2g -XX:PermSize=256m -XX:MaxPermSize=256m. I'm using

I have 2 questions:
1. Is solr doing something specific while an index is being updated like
updating something in memory which would cause the garbage collection?

2. Any idea how I could solve this problem? Currently I stop tomcat,
update index, start tomcat. I would like to be able to update my index
while tomcat is running. I was thinking about running more tomcat
instance with less memory for each and each running few of my indexes.
Do you think it would be the best way to go?

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