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From Josh Elser <>
Subject Re: Losing tservers - Unusually high Last Contact times
Date Tue, 20 May 2014 15:08:44 GMT
iostat -x 2 sda

The '-x' option will repeatedly print the statistics at the given 
interval (seconds). You can (optionally) also give the name(s) of 
devices for each drive.

So, assuming that your ZK transaction log (specified in 
$ZOOKEEPER_HOME/conf/zoo.cfg under the 'dataDir' key) is mounted on 
/dev/sda, the above command would list statistics every 2 seconds until 
you ctrl-C the process.

On 5/20/14, 10:21 AM, thomasa wrote:
> What is the best way to check the iowait times for the ZK transaction log?

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