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From "Terry P." <>
Subject Tabletserver message "Running low on memory"
Date Tue, 12 Nov 2013 20:32:54 GMT
On an Accumulo 1.4.2 I've gotten "[tabletserver.TabletServer] WARN: Running
low on memory" 5 times in the last two days on just one of my 6 datanodes.
That datanode is hosting ~30% of the data, as 2 datanodes had dropped from
the cluster due to a network issue some time ago and hasn't entirely
rebalanced.  Current volume is only 140 million.

Ingest rates has been pretty constant at a light 200 per second.

Not knowing how Accumulo uses its java heap space, I opted to start with a
stock memory config and used the 3GB example config files, which I see
allocates only 1GB to the TabletServer. The server has 24GB RAM and
currently is using only 10GB total between Accumulo and HDFS, so there's
plenty of free memory to spare.

Is ACCUMULO_TSERVER_OPTS in the tunable I should target to
alleviate these warnings?

Unfortunately being ops-configured nodes, no JDKs are installed nor is it a
possibility to do so in order to monitor the JVM itself for better

Thanks in advance,

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