[improvement](cgroup) inactive_file should be treated as available memory to avoid query be cancelled#64347
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yiguolei wants to merge 2 commits into
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[improvement](cgroup) inactive_file should be treated as available memory to avoid query be cancelled#64347yiguolei wants to merge 2 commits into
yiguolei wants to merge 2 commits into
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Thank you for your contribution to Apache Doris. Please clearly describe your PR:
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…mory to avoid query be cancelled
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run buildall |
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TPC-H: Total hot run time: 29737 ms |
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TPC-DS: Total hot run time: 169589 ms |
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gavinchou
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Jun 10, 2026
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PR approved by at least one committer and no changes requested. |
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PR approved by anyone and no changes requested. |
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What problem does this PR solve?
Issue Number: close #xxx
Related PR: #xxx
Problem Summary:
Sometimes we may see this errors in cgroup or k8s environment. Allocator sys memory check failed: Cannot alloc:5343, ...,process memory used 85.41 GB exceed limit 108.00 GB or sys available memory 5.88 GB less than low water mark 6.00 GB.
The mem_limit term is false (85.41 < 108). The 5343-byte allocation is rejected only by sys available memory 5.88 GB < low water mark 6.00 GB. 5.88 GiB available implies cgroup_mem_usage of about 114 GiB, roughly 29 GiB above process memory used (85.41 GiB); that gap is unmapped read page cache. The kernel reclaims clean page cache before OOM, so the memory is available, but Doris cannot reclaim it and the rejection repeats on later allocations. (low water mark 6.00 GB is the default: min(120 - 108, 120 * 5%) = 6.)
Before this PR, cgroup_mem_usage = memory.current - inactive_file - slab_reclaimable. So some active files page cache is not treated as recycleable memory. So cgroup_mem_usage is a bit larger than RSS.
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