Hi Otis, Enabling metrics really just amounts to periodically pushing the metrics to whatever MetricsContext is configured, which is decoupled from other cluster operations. So I wouldn't expect any measurable performance impact (I haven't tried measuring though).
Yes, the FileContext output just writes a separate line of comma-separated name=value metrics for each metrics record to a local file (path set in the properties file). --gh On Wed, Jan 19, 2011 at 9:30 AM, Otis Gospodnetic < [email protected]> wrote: > Hi, > > Are there any gotchas around turning on HBase performance metrics > gathering/publishing (the stuff described on > http://hbase.apache.org/docs/current/metrics.html), such as "if you turn > this > on, be prepared to pay N% loss in performance" or some such? > > Also, the "file" plugin just logs performance metrics to a log file, is > that so? > > Thanks, > Otis > P.S. > http://hbase.apache.org/docs/current/metrics.htm may be a bit out of date > - > I see additional metrics mentioned on > https://issues.apache.org/jira/browse/HBASE-2838 > ---- > Sematext :: http://sematext.com/ :: Solr - Lucene - Hadoop - HBase > Hadoop ecosystem search :: http://search-hadoop.com/ >
