Re: Proposal: GetOldestXminExtend for ignoring arbitrary vacuum flags

From: "Seki, Eiji" <seki(dot)eiji(at)jp(dot)fujitsu(dot)com>
To: Haribabu Kommi <kommi(dot)haribabu(at)gmail(dot)com>
Cc: "pgsql-hackers(at)postgresql(dot)org" <pgsql-hackers(at)postgresql(dot)org>, "Michael Paquier" <michael(dot)paquier(at)gmail(dot)com>, Jim Nasby <Jim(dot)Nasby(at)bluetreble(dot)com>, 'Robert Haas' <robertmhaas(at)gmail(dot)com>
Subject: Re: Proposal: GetOldestXminExtend for ignoring arbitrary vacuum flags
Date: 2017-03-21 04:16:44
Message-ID: A11BD0E1A40FAC479D740CEFA373E203396B3289@g01jpexmbkw05
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On 2017-02-24 04:17:20 Haribabu Kommi wrote:
>On Fri, Feb 24, 2017 at 3:17 PM, Seki, Eiji <seki(dot)eiji(at)jp(dot)fujitsu(dot)com>
>> Thank you for your comments.
>> I reflected these comments to the attached patch. And I renamed IGNORE_XXX
>> flags to PROCARRAY_XXX flags.
>I checked the latest patch and I have some comments.
>+static int
>+ConvertProcarrayFlagToProcFlag(int flags)
>I feel this function is not needed, if we try to maintain same flag values
>for both PROC_XXX and PROCARRAY_XXX by writing some comments
>in the both the declarations place to make sure that the person modifying
>the flag values needs to update them in both the places. I feel it is
>rare that the flag values gets changed.
>+ * Now, flags is used only for ignoring backends with some flags.
>How about writing something like below.
>The flags are used to ignore the backends in calculation when any of the
>corresponding flags is set.
>How about changing the flag name to PROCARRAY_VACUUM_FLAG
>(similar changes to other declarations)
>+/* Use these flags in GetOldestXmin as "flags" */
>Add some comments here to explain how to use these flags.
>same here also as PROCARRAY_DEFAULT_FLAGS
>(similar changes to other declarations)

Thank you for you review.

I reflected your comment and attach the updated patch.

Eiji Seki

Attachment Content-Type Size
get_oldest_xmin_with_ignore_flags_v3.patch application/octet-stream 9.0 KB

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