Matthew Jacobs has posted comments on this change.

Change subject: IMPALA-5715: (mitigation only) defer destruction of MemTrackers
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Patch Set 2:

> That was a bit more involved than expected, but all MemTrackers
 > should now have the same lifetime as the QueryState (because they
 > are either in the QueryState object pool or owned by a control
 > structure with that lifetime).

Seems like a good idea, but can you summarize from the offline conversation you 
had why this seemed worth addressing for IMPALA-5715? One thing to keep in mind 
is how easy the patch may be to backport to past releases.

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Gerrit-MessageType: comment
Gerrit-Change-Id: I205abb0076d1ffd08cb93c0f1671c8b81e7fba0f
Gerrit-PatchSet: 2
Gerrit-Project: Impala-ASF
Gerrit-Branch: master
Gerrit-Owner: Tim Armstrong <[email protected]>
Gerrit-Reviewer: Henry Robinson <[email protected]>
Gerrit-Reviewer: Matthew Jacobs <[email protected]>
Gerrit-Reviewer: Michael Ho <[email protected]>
Gerrit-Reviewer: Tim Armstrong <[email protected]>
Gerrit-HasComments: No

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