From: Ron <ronljohnsonjr@gmail.com>
To: Pgsql-admin <pgsql-admin@lists.postgresql.org>
Subject: Re: Old WAL files under pg_xlog not getting delete
Date: Thu, 31 Jan 2019 11:02:22 -0600
Message-ID: <faf76ac2-e371-791a-36b2-0941e6620ff0@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>
"i had to run checkpoint manually to clean."
I see no problem with that. Postgres would have checkpointed sooner or later.
On 1/31/19 10:22 AM, rammohan ganapavarapu 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
> <mailto: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 <mailto:david.g.johnston@gmail.com> wrote:
>>
>> On Wed, Jan 30, 2019 at 5:00 PM Alvaro Herrera
>> <alvherre@2ndquadrant.com <mailto: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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Subject: Re: Old WAL files under pg_xlog not getting delete
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