Fix the problem that /debug/pprof/heap will wait 10s

[CalvinNeo]

The problem is that according to

tidb-engine-ext/proxy_components/proxy_server/src/status_server/profile.rs

Line 104 in 50b8d2e

pub async fn start_one_heap_profile<F>(

, the http API /debug/pprof/heap will use a ProfileGuard to sample at least the interval of time.

However, if we already enabled prof.active, it is no longer necessary to sleep this duration to sample.

So we will remove this interval, and dump directly. And thus requires the user to explicitly turn on prof.active.

This behavior also correspond to the behavior that after we enabled continous profiling, which TiKV already did.

The change is that we totally use TiKV's idea that make /heap dump only the prof.dump file.

What is changed and how it works?

Issue Number: Close #xxx

What's Changed:

Related changes

• PR to update pingcap/docs/pingcap/docs-cn:
• Need to cherry-pick to the release branch

Check List

Tests

• Unit test
• Integration test
• Manual test (add detailed scripts or steps below)
• No code

Side effects

• Performance regression: Consumes more CPU
• Performance regression: Consumes more Memory
• Breaking backward compatibility

Release note

[JaySon-Huang]

LGTM

[ti-chi-bot]

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This pull-request has been approved by: JaySon-Huang

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[ti-chi-bot]

[LGTM Timeline notifier]

Timeline:

• 2024-12-16 03:31:48.344742417 +0000 UTC m=+841298.433544960: ☑️ agreed by JaySon-Huang.