Dayue Gao created KYLIN-2436:
--------------------------------
Summary: add a configuration knob to disable spilling of
aggregation cache
Key: KYLIN-2436
URL: https://issues.apache.org/jira/browse/KYLIN-2436
Project: Kylin
Issue Type: Improvement
Components: Storage - HBase
Affects Versions: v1.6.0
Reporter: Dayue Gao
Assignee: Dayue Gao
Kylin's aggregation operator can spill intermediate results to disk when its
estimated memory usage exceeds some threshold (kylin.query.coprocessor.mem.gb
to be specific). While it's a useful feature in general to prevent RegionServer
from OOM, there are times when aborting this kind of memory-hungry query
immediately is a more suitable choice to users.
To accommodate this requirement, I suggest adding a new configuration named
"kylin.storage.hbase.coprocessor-spill-enabled". The default value would be
true, which will keep the same behavior as before. If changed to false, query
that uses more aggregation memory than threshold will fail immediately.
--
This message was sent by Atlassian JIRA
(v6.3.15#6346)
