cassandra-commits mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From "Jeremy Hanna (JIRA)" <j...@apache.org>
Subject [jira] [Created] (CASSANDRA-6794) Optimise slab allocator to enable higher number of column families
Date Mon, 03 Mar 2014 13:21:21 GMT
Jeremy Hanna created CASSANDRA-6794:
---------------------------------------

             Summary: Optimise slab allocator to enable higher number of column families
                 Key: CASSANDRA-6794
                 URL: https://issues.apache.org/jira/browse/CASSANDRA-6794
             Project: Cassandra
          Issue Type: Improvement
          Components: Core
            Reporter: Jeremy Hanna
            Assignee: Benedict


Currently the slab allocator allocates 1MB per column family.  This has been very beneficial
for gc efficiency.  However, it makes it more difficult to have large numbers of column families.

It would be preferable to have a more intelligent way to allocate slabs so that there is more
flexibility between slab allocator and non-slab allocator behaviour.

A simple first step is to ramp up size of slabs from small (say  8KB) when empty, to 1MB after
a few slabs.



--
This message was sent by Atlassian JIRA
(v6.2#6252)

Mime
View raw message