HBase Read Path openinx@apache.org Abstract ❏ Client Side ❏ Server Side ❏ Tuning Part-1 Client Side HBase Client ClientScanner ClientScanner cache(queue) scanner.next() RegionServer-0 RegionServer-1 compacting them (old generation) ● Less mixed GC(s) and shorter STW time. End-to-end offheap on the read-path (HBASE-11425) BucketCache StoreFileScanner Copy the Block from BucketCache(offheap) to onheap. reference to the offheap block. Rpc Handler offheap onheap Use the DirectByteBuffer in all the read path. branch-1.5 branch-2 ● No need to copy block from offheap to onheap. ● Less onheap occupied. ●

......................................................................71 5.8.3. The Schema Search Path..............................................................................72 5.8.4. Schemas and Progress..............................................................................727 31.7. The Fast-Path Interface........................................................................................ Internals .................................................................................1881 48.1. The Path of a Query.......................................................................................

......................................................................78 5.8.3. The Schema Search Path.....................................................................................78 5.8.4. Schemas ...............................................................................768 31.7. The Fast-Path Interface........................................................................................ ..................................................................................1999 48.1. The Path of a Query.......................................................................................

......................................................................78 5.8.3. The Schema Search Path.....................................................................................78 5.8.4. Schemas ...............................................................................812 32.7. The Fast-Path Interface........................................................................................ ..................................................................................2063 49.1. The Path of a Query.......................................................................................

......................................................................72 5.8.3. The Schema Search Path..............................................................................72 5.8.4. Schemas and Progress..............................................................................767 32.7. The Fast-Path Interface........................................................................................ Internals .................................................................................1950 49.1. The Path of a Query.......................................................................................

in Progress .................................................................... 816 33.7. The Fast-Path Interface ............................................................................. 817 33.8. PostgreSQL Internals ...................................................................... 1996 50.1. The Path of a Query ............................................................................... 1996 50 installed at all or your shell's search path was not set to include it. Try calling the command with an absolute path instead: $ /usr/local/pgsql/bin/createdb mydb The path at your site might be different.

in Progress .................................................................... 939 34.8. The Fast-Path Interface ............................................................................. 940 34.9. PostgreSQL Internals ...................................................................... 2274 51.1. The Path of a Query ............................................................................... 2274 51 installed at all or your shell's search path was not set to include it. Try calling the command with an absolute path instead: $ /usr/local/pgsql/bin/createdb mydb The path at your site might be different.

in Progress .................................................................... 907 33.7. The Fast-Path Interface ............................................................................. 908 33.8. PostgreSQL Internals ...................................................................... 2196 50.1. The Path of a Query ............................................................................... 2196 50 installed at all or your shell's search path was not set to include it. Try calling the command with an absolute path instead: $ /usr/local/pgsql/bin/createdb mydb The path at your site might be different.

Queries in Progress .............................................................. 894 34.8. The Fast-Path Interface ....................................................................... 895 34.9. Asynchronous PostgreSQL Internals ................................................................. 2151 51.1. The Path of a Query ......................................................................... 2151 51.2. How installed at all or your shell's search path was not set to include it. Try calling the command with an absolute path instead: $ /usr/local/pgsql/bin/createdb mydb The path at your site might be different.

Queries in Progress .............................................................. 861 33.7. The Fast-Path Interface ....................................................................... 862 33.8. Asynchronous PostgreSQL Internals ................................................................. 2074 50.1. The Path of a Query ......................................................................... 2074 50.2. How installed at all or your shell's search path was not set to include it. Try calling the command with an absolute path instead: $ /usr/local/pgsql/bin/createdb mydb The path at your site might be different.