Hi, guys!
On a multi-node cluster, indexing of TSDS (otel-format metrics) is stable on 9.0.x.
After upgrading to 9.1.4, the indexing rate drops and the write queue grows, making the cluster unstable.
Profiling shows significant time spent in dv.writeField (see pic. 1)
Disabling the new 9.1.x optimization with:
-Dorg.elasticsearch.index.codec.tsdb.es819.ES819TSDBDocValuesConsumer.enableOptimizedMerge=false
restores normal performance.
Can you help figure out the root cause?
(using java 21)
Hi, guys!
On a multi-node cluster, indexing of TSDS (otel-format metrics) is stable on 9.0.x.
After upgrading to 9.1.4, the indexing rate drops and the write queue grows, making the cluster unstable.
Profiling shows significant time spent in dv.writeField (see pic. 1)
Disabling the new 9.1.x optimization with:
-Dorg.elasticsearch.index.codec.tsdb.es819.ES819TSDBDocValuesConsumer.enableOptimizedMerge=falserestores normal performance.
Can you help figure out the root cause?
(using java 21)