[Platform] Slow Queries doesnt work on K8s universe pods #7811
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andrewc-dev
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Apr 19, 2021
Summary: Slow queries is currently not displaying all queries on k8s universe pods. The reason is due to the database only storing pg_stat_statements on the node which received the queries. Currently we fetch queries from the first node/pod in the list, so let's fetch from all nodes and aggregate the results. This issue should also be apparently on multi-node clusters or when queries are run against read replicas. **Note: I haven't tested it locally yet due to being unable to create universes, so it would be helpful to hear opinions on whether this is the best way to go about it.** Test Plan: Create multi-node (or k8s) universe and run queries on different nodes and check that YW displays the information correctly. Confirm that queries on read replicas also show up. Reviewers: arnav, wesley, sb-yb, spotachev Reviewed By: spotachev Subscribers: jenkins-bot, yugaware Differential Revision: https://phabricator.dev.yugabyte.com/D11114
YintongMa
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May 26, 2021
…pod. Summary: Slow queries is currently not displaying all queries on k8s universe pods. The reason is due to the database only storing pg_stat_statements on the node which received the queries. Currently we fetch queries from the first node/pod in the list, so let's fetch from all nodes and aggregate the results. This issue should also be apparently on multi-node clusters or when queries are run against read replicas. **Note: I haven't tested it locally yet due to being unable to create universes, so it would be helpful to hear opinions on whether this is the best way to go about it.** Test Plan: Create multi-node (or k8s) universe and run queries on different nodes and check that YW displays the information correctly. Confirm that queries on read replicas also show up. Reviewers: arnav, wesley, sb-yb, spotachev Reviewed By: spotachev Subscribers: jenkins-bot, yugaware Differential Revision: https://phabricator.dev.yugabyte.com/D11114
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Validated this issue by running sample apps in k8 universe on 2.6 b-57 and verified the slow queries. cc @VijiYB |
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Slow queries doesn't show any ysql queries running on k8s pods.
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