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https://issues.apache.org/jira/browse/HBASE-28221?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Viraj Jasani updated HBASE-28221:
---------------------------------
Description:
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 as we block any write requests until region memstore stays at
full capacity.
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.
was:
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.
> 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
> Priority: Major
> 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 as we block any write requests until region
> memstore stays at full capacity.
>
> 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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