Viraj Jasani created HBASE-28221:
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Summary: Introduce regionserver metric for delayed flushes
Key: HBASE-28221
URL: https://issues.apache.org/jira/browse/HBASE-28221
Project: HBase
Issue Type: Improvement
Reporter: Viraj Jasani
Fix For: 2.6.0, 3.0.0-beta-1
If compaction is disabled temporarily to allow stabilizing hdfs load, we can
forget re-enabling the compaction. This can result into flushes getting delayed
for "hbase.hstore.blockingWaitTime" time (90s). While flushes do happen
eventually after waiting for max blocking time, it is important to realize that
any cluster cannot function well with compaction disabled for significant
amount of time.
Delayed flush logs:
{code:java}
LOG.warn("{} has too many store files({}); delaying flush up to {} ms",
region.getRegionInfo().getEncodedName(), getStoreFileCount(region),
this.blockingWaitTime); {code}
Suggestion: Introduce regionserver metric (MetricsRegionServerSource) for the
num of flushes getting delayed due to too many store files.
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