Repository: hbase Updated Branches: refs/heads/master 5f4e85d3f -> 60d3e3c90
More suggestion folks use offheap block cache Project: http://git-wip-us.apache.org/repos/asf/hbase/repo Commit: http://git-wip-us.apache.org/repos/asf/hbase/commit/60d3e3c9 Tree: http://git-wip-us.apache.org/repos/asf/hbase/tree/60d3e3c9 Diff: http://git-wip-us.apache.org/repos/asf/hbase/diff/60d3e3c9 Branch: refs/heads/master Commit: 60d3e3c905cc752d83a5a622bdb505400fb431b0 Parents: 19979d7 Author: stack <[email protected]> Authored: Fri Jul 18 16:56:33 2014 -0700 Committer: stack <[email protected]> Committed: Fri Jul 18 16:56:48 2014 -0700 ---------------------------------------------------------------------- src/main/docbkx/performance.xml | 4 ++++ 1 file changed, 4 insertions(+) ---------------------------------------------------------------------- http://git-wip-us.apache.org/repos/asf/hbase/blob/60d3e3c9/src/main/docbkx/performance.xml ---------------------------------------------------------------------- diff --git a/src/main/docbkx/performance.xml b/src/main/docbkx/performance.xml index 04ca00c..c00b635 100644 --- a/src/main/docbkx/performance.xml +++ b/src/main/docbkx/performance.xml @@ -183,6 +183,8 @@ save a bit of YGC churn and allocate in the old gen directly. </para> <para>For more information about GC logs, see <xref linkend="trouble.log.gc" />. </para> + <para>Consider also enabling the offheap Block Cache. This has been shown to mitigate + GC pause times. See <xref linkend="block.cache" /></para> </section> </section> </section> @@ -723,6 +725,8 @@ htable.close(); <methodname>setCacheBlocks</methodname> method. For input Scans to MapReduce jobs, this should be <varname>false</varname>. For frequently accessed rows, it is advisable to use the block cache.</para> + + <para>Cache more data by moving your Block Cache offheap. See <xref linkend="offheap.blockcache" /></para> </section> <section xml:id="perf.hbase.client.rowkeyonly">
