From: John Scalia <jayknowsunix@gmail.com>
To: rammohan ganapavarapu <rammohanganap@gmail.com>
Cc: Ron <ronljohnsonjr@gmail.com>
Cc: Pgsql-admin <pgsql-admin@lists.postgresql.org>
Subject: Re: Old WAL files under pg_xlog not getting delete
Date: Thu, 31 Jan 2019 11:37:19 -0500
Message-ID: <AF7ED4E4-C8FC-4BD5-A1E4-B0BA456E304B@gmail.com> (raw)
In-Reply-To: <CALm_Vji8606+5bcqDHBfpwAoft532fyM3YH_XSkGQHhD+0KPWA@mail.gmail.com>
References: <aea0796a-9b55-aa75-4ad3-5377fc03e240@gmail.com>
<201901310000.fkapsf6clz5s@alvherre.pgsql>
<CAKFQuwZoawTQ5E05OY61cTaiXxcz6kom7gY0-_6wn9=Nqc6kHA@mail.gmail.com>
<CALm_Vjhf4AJF_=rvOMmmwKcaN3CN0YNnm7Q8RwivpLio8G+i7A@mail.gmail.com>
<ff52b4a5-5232-abec-f148-a223b048f138@gmail.com>
<CALm_Vji8606+5bcqDHBfpwAoft532fyM3YH_XSkGQHhD+0KPWA@mail.gmail.com>
Ram,
Remember that keep_wal_segments is a minimum setting, not a maximum one. It’s telling the database to maintain at least that many segments. Plus, check how you’ve set the archive_command. If that’s not correct, nothing will remove the WAL files.
—
Jay
Sent from my iPhone
> On Jan 31, 2019, at 11:22 AM, rammohan ganapavarapu <rammohanganap@gmail.com> wrote:
>
> Ron,
>
> I have changed the wal_keep_segments=100 and restarted the postgresql processes but i still see 500+ files under pg_xlog, i had to run checkpoint manually to clean.
>
> Ram
>
>> On Wed, Jan 30, 2019 at 7:19 PM Ron <ronljohnsonjr@gmail.com> wrote:
>>> On 1/30/19 9:09 PM, rammohan ganapavarapu wrote:
>>> Thank you all, but irrespective of count i have why is it keeping old files?
>>
>> Because you're telling it to!!
>>
>> max_wal_size= 1GB
>> wal_keep_segments=500
>>
>>> and how is it using those files? Is there any processes that can flush or remove those files?
>>
>> Change the parameter and restart the server...
>>
>>>
>>>> On Wed, Jan 30, 2019, 4:11 PM David G. Johnston <david.g.johnston@gmail.com wrote:
>>>> On Wed, Jan 30, 2019 at 5:00 PM Alvaro Herrera <alvherre@2ndquadrant.com> wrote:
>>>> > Hmm ... I would recommend to keep the xlog files in a subdir, not the
>>>> > root of the filesystem.
>>>>
>>>> They are in a subdir (under /opt/pgdata), and the OP seems likely to
>>>> have omitted the self/parent hidden directories during his check as
>>>> well. Plus per the docs we actually expect 501 so there isn't a need
>>>> to account for 6 extra, just 5.
>>>>
>>>> Dave
>>>>
>>
>> --
>> Angular momentum makes the world go 'round.
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Cc: jayknowsunix@gmail.com, rammohanganap@gmail.com, ronljohnsonjr@gmail.com, pgsql-admin@lists.postgresql.org
Subject: Re: Old WAL files under pg_xlog not getting delete
In-Reply-To: <AF7ED4E4-C8FC-4BD5-A1E4-B0BA456E304B@gmail.com>
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