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From "ryan rawson (JIRA)" <j...@apache.org>
Subject [jira] Created: (HBASE-1326) hbase doesn't size memcache correctly under -XX:+UseG1GC
Date Fri, 17 Apr 2009 07:54:15 GMT
hbase doesn't size memcache correctly under -XX:+UseG1GC

                 Key: HBASE-1326
                 URL: https://issues.apache.org/jira/browse/HBASE-1326
             Project: Hadoop HBase
          Issue Type: Bug
    Affects Versions: 0.20.0
         Environment: java 1.7
            Reporter: ryan rawson
             Fix For: 0.20.0

I get this in the logfile:

2009-04-16 23:49:20,518 INFO org.apache.hadoop.hbase.regionserver.MemcacheFlusher: Forced
flushing of <table redacted>,1239954535262 because global memcache limit of 3.2m exceeded;
currently 3.2m and flushing till 2.0m

With the experimental G1 GC, the heap size is created differently, and the way we calculate
the size of memcache is flawed under this GC.  This affects performance and makes things reallll

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