fix avc memory growth

[lisuxiaoqi]

• Targeted PR against correct branch (see CONTRIBUTING.md)

• Linked to github-issue with discussion and accepted design OR link to spec that describes this work.

• Wrote tests

• Updated relevant documentation (docs/)

• Added a relevant changelog entry to the Unreleased section in CHANGELOG.md

• Reviewed Files changed in the github PR explorer

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For Admin Use:

• Added appropriate labels to PR (ex. wip, ready-for-review, docs)
• Reviewers Assigned
• Squashed all commits, uses message "Merge PR #XYZ: [title]" (coding standards)

[codecov-commenter]

Codecov Report

Merging #2787 (4235f04) into dev (3e62b38) will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##              dev    #2787   +/-   ##
=======================================
  Coverage   36.37%   36.37%           
=======================================
  Files         414      414           
  Lines       43552    43552           
=======================================
  Hits        15843    15843           
  Misses      26560    26560           
  Partials     1149     1149           

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