agora inbox for pgsql-sql@postgresql.org
help / color / mirror / Atom feedFrom: Adrian Klaver <adrian.klaver@aklaver.com>
To: tel medola <tel.medola@gmail.com>
Cc: pgsql-sql@postgresql.org
Subject: Re: Lost my tablespace
Date: Tue, 30 May 2017 15:07:23 -0700
Message-ID: <48eeef4b-b04d-77c1-2b51-d59f23bdd203@aklaver.com> (raw)
In-Reply-To: <CANRMYmhGJAaZEMCevzcrhVVVhEMJzgo+P_Ms_E4UiJB60ozJHg@mail.gmail.com>
References: <CANRMYmgu3ddSU62-=a3QCnsbGYuMVJXZ-ydTm7vd_2TQLp-Oqg@mail.gmail.com>
<CANRMYmhxARYp73boRCfHB5VHDFT+wM5G=kTGrCQcN0Ds=uxLWw@mail.gmail.com>
<a9063a7d-ac70-abb8-38f4-6ef49bf401f3@aklaver.com>
<CANRMYmjc7nc0GpxCkxApQTgAr+9YGooUvA8AEU_9SjjBJb+qqg@mail.gmail.com>
<32bb9df2-3b4d-95cb-1f82-8da675536a9b@aklaver.com>
<CANRMYmgw9+vreD0+43vGK+JYyshMaea=zedwc1ufYS_cBEj5VA@mail.gmail.com>
<a18d2b5a-255f-e5b5-0c4d-686eb182e88e@aklaver.com>
<CANRMYmjY9V-rzygyDFrDmf2GDP_-vcsEiP-ZOXd6WvNAFUEnhA@mail.gmail.com>
<b7598d9a-eef6-1ff3-7d30-19838b3add51@aklaver.com>
<CANRMYmjXeyEYeEaVV+8k_DZBXuNipCWZ8+wWvYCKGnSKRAAEmQ@mail.gmail.com>
<100e137f-4510-031c-1fa5-51b2a145f39a@aklaver.com>
<CANRMYmgKvrGEo5NOQ7ScRBJj-jgae5bS5y6oXVrwQh0csonPbw@mail.gmail.com>
<c8865858-2ab4-12d2-8b2f-f8ef24396860@aklaver.com>
<CANRMYmjzn9RcB9W-nCnvt24cKE9hgmXB05gXkVb5PFC4sqCX6Q@mail.gmail.com>
<88a21207-a3c1-3e5e-88e6-a2403a0ea66b@aklaver.com>
<CANRMYmhGJAaZEMCevzcrhVVVhEMJzgo+P_Ms_E4UiJB60ozJHg@mail.gmail.com>
List-Unsubscribe: <mailto:majordomo@postgresql.org?body=unsub%20pgsql-sql>
On 05/30/2017 01:36 PM, tel medola wrote:
> EXACT !!!!!
>
> When I did the truncate, it erased all the files that referenced the
> table and created a new one (empty). That's why when I returned the
> physical files to the drives, it does not find the old reference and it
> is empty.
>
> I'll search how to redo the link for the correct filenode.
> Thanks very much for your help!!!
>
The thing to remember is:
https://www.postgresql.org/docs/9.3/static/storage-file-layout.html
"When a table or index exceeds 1 GB, it is divided into gigabyte-sized
segments. The first segment's file name is the same as the filenode;
subsequent segments are named filenode.1, filenode.2, etc. This
arrangement avoids problems on platforms that have file size
limitations. (Actually, 1 GB is just the default segment size. The
segment size can be adjusted using the configuration option
--with-segsize when building PostgreSQL.) In principle, free space map
and visibility map forks could require multiple segments as well, though
this is unlikely to happen in practice."
and:
"A table that has columns with potentially large entries will have an
associated TOAST table, which is used for out-of-line storage of field
values that are too large to keep in the table rows proper.
pg_class.reltoastrelid links from a table to its TOAST table, if any.
See Section 58.2 for more information."
--
Adrian Klaver
adrian.klaver@aklaver.com
--
Sent via pgsql-sql mailing list (pgsql-sql@postgresql.org)
To make changes to your subscription:
http://www.postgresql.org/mailpref/pgsql-sql
view thread (25+ messages) latest in thread
Message-ID: <48eeef4b-b04d-77c1-2b51-d59f23bdd203@aklaver.com>
Permalink: ../48eeef4b-b04d-77c1-2b51-d59f23bdd203@aklaver.com/
Also on: postgresql.org/message-id/48eeef4b-b04d-77c1-2b51-d59f23bdd203@aklaver.com
reply
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Reply to all the recipients using the --to and --cc options:
reply via email
To: pgsql-sql@postgresql.org
Cc: adrian.klaver@aklaver.com, tel.medola@gmail.com
Subject: Re: Lost my tablespace
In-Reply-To: <48eeef4b-b04d-77c1-2b51-d59f23bdd203@aklaver.com>
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
This inbox is served by agora; see mirroring instructions
for how to clone and mirror all data and code used for this inbox