pg.ddx.io pgsql-admin@postgresql.org mailing list archive
help / color / mirror / Atom feedUnderstanding JSONB and TOAST tables
2+ messages / 2 participants
[nested] [flat]
* Understanding JSONB and TOAST tables
@ 2020-06-09 19:48 Wells Oliver <wells.oliver@gmail.com>
2020-06-09 22:59 ` Re: Understanding JSONB and TOAST tables Peter Eisentraut <peter.eisentraut@2ndquadrant.com>
0 siblings, 1 reply; 2+ messages in thread
From: Wells Oliver @ 2020-06-09 19:48 UTC (permalink / raw)
To: pgsql-admin
Is there documentation that lays out how JSONB columns are stored? I have a
Rather Large Table with 37m+ rows with large JSONB objects, its size is
about 300mb, but there's an associated TOAST table with a 28GB size.
Curious how/why PSQL would store JSONB stuff this way.
Thanks!
--
Wells Oliver
wells.oliver@gmail.com <wellsoliver@gmail.com>
^ permalink raw reply [nested|flat] 2+ messages in thread
* Re: Understanding JSONB and TOAST tables
2020-06-09 19:48 Understanding JSONB and TOAST tables Wells Oliver <wells.oliver@gmail.com>
@ 2020-06-09 22:59 ` Peter Eisentraut <peter.eisentraut@2ndquadrant.com>
0 siblings, 0 replies; 2+ messages in thread
From: Peter Eisentraut @ 2020-06-09 22:59 UTC (permalink / raw)
To: Wells Oliver <wells.oliver@gmail.com>; pgsql-admin
On 2020-06-09 21:48, Wells Oliver wrote:
> Is there documentation that lays out how JSONB columns are stored? I
> have a Rather Large Table with 37m+ rows with large JSONB objects, its
> size is about 300mb, but there's an associated TOAST table with a 28GB size.
>
> Curious how/why PSQL would store JSONB stuff this way.
TOAST is documented here:
https://www.postgresql.org/docs/current/storage-toast.html. JSONB is
handled like any other (variable-size) data type. You can use the
per-column storage settings mentioned on that page to perhaps achieve
different storage outcomes.
--
Peter Eisentraut http://www.2ndQuadrant.com/
PostgreSQL Development, 24x7 Support, Remote DBA, Training & Services
^ permalink raw reply [nested|flat] 2+ messages in thread
end of thread, other threads:[~2020-06-09 22:59 UTC | newest]
Thread overview: 2+ messages (download: mbox mbox.gz follow: Atom feed)
-- links below jump to the message on this page --
2020-06-09 19:48 Understanding JSONB and TOAST tables Wells Oliver <wells.oliver@gmail.com>
2020-06-09 22:59 ` Peter Eisentraut <peter.eisentraut@2ndquadrant.com>
This inbox is served by DDX for PostgreSQL; see mirroring instructions
for how to clone and mirror all data and code used for this inbox