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Re: [HACKERS] Parallel bitmap heap scan - Mailing list pgsql-hackers

From Dilip Kumar
Subject Re: [HACKERS] Parallel bitmap heap scan
Date
Msg-id CAFiTN-tdkpSL+-aFL9b-qfyZ4BNJrrV4F3Z0mMOj+_9qQWr9SA@mail.gmail.com
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In response to Re: [HACKERS] Parallel bitmap heap scan  (Robert Haas <robertmhaas@gmail.com>)
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On Sun, Feb 19, 2017 at 10:34 PM, Robert Haas <robertmhaas@gmail.com> wrote:
> Yeah, but it looks like ExecReScanGather gets rid of the workers, but
> reuses the existing DSM.  I'm not quite sure what happens to the DSA.
> It looks like it probably just hangs around from the previous
> iteration, which means that any allocations will also hang around.

Yes right, they hang around. But, during rescan
(ExecReScanBitmapHeapScan) we can free all these DSA pointers ? That
mean before reallocating the DSA pointers we would have already got
rid of the old ones.


-- 
Regards,
Dilip Kumar
EnterpriseDB: http://www.enterprisedb.com

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