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High CPU usage to the extent where the node becomes unresponsive #2062

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masih opened this issue Jun 30, 2023 · 3 comments
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High CPU usage to the extent where the node becomes unresponsive #2062

masih opened this issue Jun 30, 2023 · 3 comments
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masih commented Jun 30, 2023 •
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Observed on Inga on 30th of June between 0930-1130 UTC on inga.

Check grafana metrics, logs and investigate root cause. For now, we should not roll out 0.7.5 to prod.
@masih masih mentioned this issue Jun 30, 2023
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@masih masih mentioned this issue Jun 30, 2023
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@masih masih changed the title Release 0.7.5 seem to cause high CPU usage to the extent where the node becomes unresponsive High CPU usage to the extent where the node becomes unresponsive Jun 30, 2023
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masih commented Jun 30, 2023

Updated the issue title as this occurs on 0.7.3 too.

PProf/profile on the node seems to suggest locking contention with leveldb lookups
Screenshot 2023-06-30 at 14 14 34

Which points to index counter? Investigating.

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masih commented Jun 30, 2023 •
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Update: Excluding index counter from find server seems to have resolved the CPU contention. Working on a fix in #2067

Impact before and after deployment:

image

This was referenced Jun 30, 2023
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Fixed by #2101 and by integration of new provider cache into dhstore and indexstar.

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