http: add /debug/gogc to set GOGC on the fly
#20247
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/run-monitor-test |
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Visit the grafana server at: http://172.16.5.5:32445, it will last for 5 hours |
jackysp
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Sep 27, 2020
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/approve |
ti-srebot
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Sep 27, 2020
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/merge |
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/run-all-tests |
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Signed-off-by: ti-srebot <ti-srebot@pingcap.com>
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cherry pick to release-4.0 in PR #20253 |
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What problem does this PR solve?
Problem Summary:
Sometimes we need to adjust the GOGC to temporarily relieve memory pressure, so I have added an HTTP API to support this operation.
What is changed and how it works?
What's Changed:
Use
debug.SetGCPercentto adjust GOGC for the next GC cycle, and updateTiDB-Runtimedashboard to use the realGOGCvalue.To make it easier to troubleshooting, I also added
GOGCandMAXPROCSto the output of/info.Release note