[ https://issues.apache.org/jira/browse/SOLR-10226?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Otis Gospodnetic updated SOLR-10226: ------------------------------------ Description: JMX Metric avgTimePerRequest (of org.apache.solr.handler.component.SearchHandler) doesn't appear to behave correctly anymore. It was a cumulative value in pre-6.4 versions. Since totalTime metric was removed (which was a base for monitoring calculations), avgTimePerRequest seems like possible alternative to calculate "time spent in requests since last measurement", but it behaves strangely after 6.4. I did a simple test on gettingstarted collection (just unpacked the Solr 6.4.1 version and started it with "bin/solr start -e cloud -noprompt"). The query I used was: http://localhost:8983/solr/gettingstarted/select?indent=on&q=*:*&wt=json I run it 30 times in a row (with approx 1 sec between executions). At the same time I was looking (with jconsole) at bean solr/gettingstarted_shard2_replica2:type=/select,id=org.apache.solr.handler.component.SearchHandler Here is how metric was changing over time (first number is "requests" metric, second number is "avgTimePerRequest"): 10 6.6033 12 5.9557 13 0.9015 ---> 13th req would need negative duration if this was cumulative 15 6.7315 16 7.4873 17 0.8458 ---> same case with 17th request 23 6.1076 At the same time bean solr/gettingstarted_shard1_replica2:type=/select,id=org.apache.solr.handler.component.SearchHandler also showed strange values: 6 5.13482 8 10.5694 9 0.504 10 0.344 12 8.8121 18 3.3531 CC [~ab] was: JMX Metric avgTimePerRequest (of org.apache.solr.handler.component.SearchHandler) doesn't appear to behave correctly anymore. It was a cumulative value in pre-6.4 versions. Since totalTime metric was removed (which was a base for monitoring calculations), avgTimePerRequest seems like possible alternative to calculate "time spent in requests since last measurement", but it behaves strangely after 6.4. I did a simple test on gettingstarted collection (just unpacked the Solr 6.4.1 version and started it with "bin/solr start -e cloud -noprompt"). The query I used was: http://localhost:8983/solr/gettingstarted/select?indent=on&q=*:*&wt=json I run it 30 times in a row (with approx 1 sec between executions). At the same time I was looking (with jconsole) at bean solr/gettingstarted_shard2_replica2:type=/select,id=org.apache.solr.handler.component.SearchHandler Here is how metric was changing over time (first number is "requests" metric, second number is "avgTimePerRequest"): 10 6.6033 12 5.9557 13 0.9015 ---> 13th req would need negative duration if this was cumulative 15 6.7315 16 7.4873 17 0.8458 ---> same case with 17th request 23 6.1076 At the same time bean solr/gettingstarted_shard1_replica2:type=/select,id=org.apache.solr.handler.component.SearchHandler also showed strange values: 6 5.13482 8 10.5694 9 0.504 10 0.344 12 8.8121 18 3.3531 > JMX metric avgTimePerRequest broken > ----------------------------------- > > Key: SOLR-10226 > URL: https://issues.apache.org/jira/browse/SOLR-10226 > Project: Solr > Issue Type: Bug > Security Level: Public(Default Security Level. Issues are Public) > Components: metrics > Affects Versions: 6.4.1 > Reporter: Bojan Smid > > JMX Metric avgTimePerRequest (of > org.apache.solr.handler.component.SearchHandler) doesn't appear to behave > correctly anymore. It was a cumulative value in pre-6.4 versions. Since > totalTime metric was removed (which was a base for monitoring calculations), > avgTimePerRequest seems like possible alternative to calculate "time spent in > requests since last measurement", but it behaves strangely after 6.4. > I did a simple test on gettingstarted collection (just unpacked the Solr > 6.4.1 version and started it with "bin/solr start -e cloud -noprompt"). The > query I used was: > http://localhost:8983/solr/gettingstarted/select?indent=on&q=*:*&wt=json > I run it 30 times in a row (with approx 1 sec between executions). > At the same time I was looking (with jconsole) at bean > solr/gettingstarted_shard2_replica2:type=/select,id=org.apache.solr.handler.component.SearchHandler > Here is how metric was changing over time (first number is "requests" metric, > second number is "avgTimePerRequest"): > 10 6.6033 > 12 5.9557 > 13 0.9015 ---> 13th req would need negative duration if this was > cumulative > 15 6.7315 > 16 7.4873 > 17 0.8458 ---> same case with 17th request > 23 6.1076 > At the same time bean > solr/gettingstarted_shard1_replica2:type=/select,id=org.apache.solr.handler.component.SearchHandler > also showed strange values: > 6 5.13482 > 8 10.5694 > 9 0.504 > 10 0.344 > 12 8.8121 > 18 3.3531 > CC [~ab] -- This message was sent by Atlassian JIRA (v6.3.15#6346) --------------------------------------------------------------------- To unsubscribe, e-mail: dev-unsubscr...@lucene.apache.org For additional commands, e-mail: dev-h...@lucene.apache.org