Yida Wu created IMPALA-14493:
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Summary: Capping Memory Usage of Global Admission Service
Key: IMPALA-14493
URL: https://issues.apache.org/jira/browse/IMPALA-14493
Project: IMPALA
Issue Type: Bug
Reporter: Yida Wu
Assignee: Yida Wu
The admission service ({{{}admissiond{}}}) can OOM on high workload because its
process memory tracker is inaccurate and doesn't account for all memory
allocations.
Ensuring memory tracker accurately accounts for every allocation could be
difficult, one simpler solution is to introduce a hard memory cap using
{{tcmalloc}} statistics, which accurately reflect the true process memory
usage. If a new query is submitted while {{tcmalloc}} memory usage is over the
process limit, the query will be rejected immediately to protect from OOM.
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