zy-kkk opened a new pull request, #39833:
URL: https://github.com/apache/doris/pull/39833
pick(#39582)
This PR addresses a memory leak issue caused by FastList objects in HikariCP
being retained by ThreadLocal variables, which are not easily garbage collected
in long-running JNI threads. To mitigate this, a system property
com.zaxxer.hikari.useWeakReferences is set to true, ensuring that WeakReference
is used for ThreadLocal objects, allowing the garbage collector to reclaim
memory more effectively. Even though setting this will affect some performance,
solving resource leaks is relatively more important
Performance difference before and after setting
Before setting:
10 concurrency 0.02-0.05
100 concurrency 0.18-0.4
After setting:
10 concurrency 0.02-0.07
100 concurrency 0.18-0.7
## Proposed changes
Issue Number: close #xxx
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