PL function has memory leak issue in long running SQL#880
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The mapping Dima issue is [seekdb][ddlmigrate]mod=SqlPx module suspected memory leak |
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Task Description
In long-running SQL statements, frequent calls to PL functions pose a risk of memory leaks.
Solution Description
Previously, each call to a PL function could allocate a block of memory using the executor context's allocator, which is an arena allocator. This memory would only be freed upon completion of the SQL execution. For SQL statements running continuously for several hours, the memory allocated by PL functions could become significant.
The fix changes the memory allocation to use a temporary allocator local to the PL function. Memory allocated by this temporary allocator is released immediately upon completion of the PL function's execution.
Passed Regressions
Upgrade Compatibility
Other Information
Related internal issue: DIMA-2026042900115822534
Release Note