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From Ying Tang <>
Subject 0.7.0beta3 Cassandra frequently log GC for ConcurrentMarkSweep
Date Mon, 06 Dec 2010 12:07:12 GMT
I hava a two node , running cassandra ,both's memory is 4G.
First i set heap size to 2G ,both run normal .
The i set heap size to 1G ,  the client who insert data to and read data
from cassandra began throw Read\Write Unavailable Exception . And one
cassandra node began  logging  GC for ConcurrentMarkSweep frequently  ,every
ConcurrentMarkSweep 's time is over 5000ms.
How this happen ? Why frequently ConcurrentMarkSweep GC ,not ParNew GC?

Best regards,
Ivy Tang

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