Re: Parallel bitmap heap scan

From: Robert Haas <robertmhaas(at)gmail(dot)com>
To: Dilip Kumar <dilipbalaut(at)gmail(dot)com>
Cc: Thomas Munro <thomas(dot)munro(at)enterprisedb(dot)com>, Haribabu Kommi <kommi(dot)haribabu(at)gmail(dot)com>, Rafia Sabih <rafia(dot)sabih(at)enterprisedb(dot)com>, tushar <tushar(dot)ahuja(at)enterprisedb(dot)com>, Amit Khandekar <amitdkhan(dot)pg(at)gmail(dot)com>, Amit Kapila <amit(dot)kapila16(at)gmail(dot)com>, Andres Freund <andres(at)anarazel(dot)de>, pgsql-hackers <pgsql-hackers(at)postgresql(dot)org>
Subject: Re: Parallel bitmap heap scan
Date: 2017-03-07 16:04:04
Message-ID: CA+TgmoZDfQ==_58+_f_S2VRx1T+5pdrmTJwVLQt=SjQ5Pi5YjA@mail.gmail.com
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On Mon, Mar 6, 2017 at 12:35 AM, Dilip Kumar <dilipbalaut(at)gmail(dot)com> wrote:
> On Thu, Mar 2, 2017 at 6:52 PM, Robert Haas <robertmhaas(at)gmail(dot)com> wrote:
>> 0002 wasn't quite careful enough about the placement of #ifdef
>> USE_PREFETCH, but otherwise looks OK. Committed after changing that
>> and getting rid of the local variable prefetch_iterator, which seemed
>> to be adding rather than removing complexity after this refactoring.
>
> 0003 is rebased after this commit.

You've still got this:

+ if (DsaPointerIsValid(node->pstate->tbmiterator))
+ tbm_free_shared_area(dsa, node->pstate->tbmiterator);
+
+ if (DsaPointerIsValid(node->pstate->prefetch_iterator))
+ dsa_free(dsa, node->pstate->prefetch_iterator);

I'm trying to get to a point where both calls use
tbm_free_shared_area() - i.e. no peeking behind the abstraction layer.

--
Robert Haas
EnterpriseDB: http://www.enterprisedb.com
The Enterprise PostgreSQL Company

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