Adem Efe Gencer created KAFKA-9373:
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Summary: Improve shutdown performance via lazy accessing the
offset and time indices.
Key: KAFKA-9373
URL: https://issues.apache.org/jira/browse/KAFKA-9373
Project: Kafka
Issue Type: Bug
Components: log
Affects Versions: 2.3.1, 2.4.0, 2.3.0
Reporter: Adem Efe Gencer
Assignee: Adem Efe Gencer
Fix For: 2.3.1, 2.4.0, 2.3.0
KAFKA-7283 enabled lazy mmap on index files by initializing indices on-demand
rather than performing costly disk/memory operations when creating all indices
on broker startup. This helped reducing the startup time of brokers. However,
segment indices are still created on closing segments, regardless of whether
they need to be closed or not.
Ideally we should:
* Improve shutdown performance via lazy accessing the offset and time indices.
* Eliminate redundant disk accesses and memory mapped operations while
deleting or renaming files that back segment indices.
* Prevent illegal accesses to underlying indices of a closed segment, which
would lead to memory leaks due to recreation of the underlying memory mapped
objects.
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