Chance Li created HBASE-19389:
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Summary: RS's handlers are all busy when writing many columns
(more than 1000 columns)
Key: HBASE-19389
URL: https://issues.apache.org/jira/browse/HBASE-19389
Project: HBase
Issue Type: Improvement
Components: hbase
Affects Versions: 2.0.0
Environment: 2000+ Region Servers
PCI-E ssd
Reporter: Chance Li
Assignee: Chance Li
Priority: Minor
Fix For: 2.0.0, 3.0.0
In a large cluster, with a large number of clients, we found the RS's handlers
are all busy sometimes. And after investigation we found the root cause is
about CSLM, such as compare function heavy load. We reviewed the related WALs,
and found that there were many columns (more than 1000 columns) were writing at
that time.
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