ZhangZhen created KUDU-2238:
-------------------------------
Summary: Big DMS not flush under memory pressure
Key: KUDU-2238
URL: https://issues.apache.org/jira/browse/KUDU-2238
Project: Kudu
Issue Type: Bug
Affects Versions: 1.3.0
Environment: CentOS6.5 Linux 2.6.32-431
Kudu1.3.0
GitCommit 00813f96b9cb
Reporter: ZhangZhen
I have a table with many updates, its DMS consumes a lot memory and cause “Soft
Memory Limit Exceed”. I check the /mem-trackers on the tablet server, one of
its DMS consumes about 3G memory, but check the /maintenance-manager, its
FlushDeltaMemStoresOp can only free 763B anchored memory and perf_improvement
is 0. Is this normal? I know Kudu is not optimized for updates, but still
confused why the DMS won’t be flushed under memory pressure.
Infos from /mem-trackers:
tablet-5941a8bb934e4686abd1bfff9e35c860 server none 3.00G 3.00G
txn_tracker tablet-5941a8bb934e4686abd1bfff9e35c860 64.00M 0B 1.67M
MemRowSet-339 tablet-5941a8bb934e4686abd1bfff9e35c860 none 265B 265B
DeltaMemStores tablet-5941a8bb934e4686abd1bfff9e35c860 none 3.00G
3.00G
Infos from /maintenance-manager
FlushDeltaMemStoresOp(5941a8bb934e4686abd1bfff9e35c860) true 763B
511.15M 0
--
This message was sent by Atlassian JIRA
(v6.4.14#64029)
