https://community.cloudera.com/t5/Archives-of-Support-Questions/Any-recommendation-on-using-G1GC-over-CMS-GC-for-HBase/m-p/94438#M7747 <P>What are advantages and benefits of G1GC? Any benchmarks?</P> Tue, 29 Sep 2015 08:29:41 GMT pardeep_kumar 2015-09-29T08:29:41Z https://community.cloudera.com/t5/Archives-of-Support-Questions/Any-recommendation-on-using-G1GC-over-CMS-GC-for-HBase/m-p/94438#M7747 <P>What are advantages and benefits of G1GC? Any benchmarks?</P> Tue, 29 Sep 2015 08:29:41 GMT https://community.cloudera.com/t5/Archives-of-Support-Questions/Any-recommendation-on-using-G1GC-over-CMS-GC-for-HBase/m-p/94438#M7747 pardeep_kumar 2015-09-29T08:29:41Z https://community.cloudera.com/t5/Archives-of-Support-Questions/Any-recommendation-on-using-G1GC-over-CMS-GC-for-HBase/m-p/94439#M7748 <P><A rel="user" href="https://community.cloudera.com/users/139/pardeepkumar.html" nodeid="139">@Pardeep</A></P><P>Hope <A target="_blank" href="http://blog.sematext.com/2013/06/24/g1-cms-java-garbage-collector/">this</A> helps</P><P>There are several good documents online. </P><P><A target="_blank" href="http://blog.asquareb.com/blog/2014/12/18/garbage-first-g1-gc-and-hbase/">Link</A></P><UL> <LI>In CMS the young and old generation heap space are physically differentiated. But in the case of G1 they are logical. This is achieved by dividing the total heap space into number of <CODE>regions</CODE> (2000) and the regions are identified whether they belong to young or old space.</LI><LI>Compaction of the heap space is done as part of the collection process which was not the case in CMS.</LI><LI>G1 collector tries to meet user specified target for application pause time during the collection process.</LI></UL> Thu, 05 Nov 2015 04:21:11 GMT https://community.cloudera.com/t5/Archives-of-Support-Questions/Any-recommendation-on-using-G1GC-over-CMS-GC-for-HBase/m-p/94439#M7748 nsabharwal 2015-11-05T04:21:11Z