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From Neil Dolling <neil.doll...@gmail.com>
Subject GCInspecto​r causing slow writes?
Date Tue, 28 Feb 2012 11:44:40 GMT
When writing to Cassandra (v 1.0.7) I'm seeing ocasional delays of up to 4
seconds. Below is from the system.log where we are seeing the delays, is
this a result of GC and is it worth me tuning these settings in order to
fix? If so, any suggestions? adjusting memtable_total_space_in_mb?

*DEBUG [ScheduledTasks:1] 2012-02-27 12:39:03,570 GCInspector.java (line
124) GC for ParNew: 97 ms for 1 collections, 1401494128 used; max is **
8506048512* <8506048512>
DEBUG [WRITE-/127.0.0.1] 2012-02-27 12:39:04,323 OutboundTcpConnection.java
(line 206) attempting to connect to /127.0.0.1
DEBUG [RequestResponseStage:27] 2012-02-27 12:39:07,992
ResponseVerbHandler.java (line 44) Processing response on a callback from
1147398@/154.4.196.76
DEBUG [RequestResponseStage:30] 2012-02-27 12:39:07,992
ResponseVerbHandler.java (line 44) Processing response on a callback from
1147403@/154.4.196.76
DEBUG [RequestResponseStage:31] 2012-02-27 12:39:07,992
ResponseVerbHandler.java (line 44) Processing response on a callback from
1147400@/154.4.196.76
DEBUG [RequestResponseStage:25] 2012-02-27 12:39:07,992
ResponseVerbHandler.java (line 44) Processing response on a callback from
1147401@/154.4.196.76
DEBUG [RequestResponseStage:32] 2012-02-27 12:39:07,992
ResponseVerbHandler.java (line 44) Processing response on a callback from
1147402@/154.4.196.76
DEBUG [RequestResponseStage:29] 2012-02-27 12:39:07,992
ResponseVerbHandler.java (line 44) Processing response on a callback from
1147399@/154.4.196.76

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