xinyiZzz opened a new pull request, #50549:
URL: https://github.com/apache/doris/pull/50549
### What problem does this PR solve?
Based on #11740
The memory size tracked in Allocator is virtual memory. If the allocated
memory is not fully used, the tracked virtual memory may be larger than the
actual physical memory.
`PODArray` does not memset 0 when allocated memory, the memory blocks
allocated by `PODArray` (such as VOlapScanNode::_free_blocks) are usually used
for memory reuse and will not be fully used.
After this PR, the unused memory in `PODArray` is recorded in reserve to
indicate that this part of the memory is not actually used.
### Check List (For Author)
- Test <!-- At least one of them must be included. -->
- [ ] Regression test
- [ ] Unit Test
- [ ] Manual test (add detailed scripts or steps below)
- [ ] No need to test or manual test. Explain why:
- [ ] This is a refactor/code format and no logic has been changed.
- [ ] Previous test can cover this change.
- [ ] No code files have been changed.
- [ ] Other reason <!-- Add your reason? -->
- Behavior changed:
- [ ] No.
- [ ] Yes. <!-- Explain the behavior change -->
- Does this need documentation?
- [ ] No.
- [ ] Yes. <!-- Add document PR link here. eg:
https://github.com/apache/doris-website/pull/1214 -->
### Check List (For Reviewer who merge this PR)
- [ ] Confirm the release note
- [ ] Confirm test cases
- [ ] Confirm document
- [ ] Add branch pick label <!-- Add branch pick label that this PR should
merge into -->
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