| From: | Pavel Stehule <pavel(dot)stehule(at)gmail(dot)com> |
|---|---|
| To: | Aleksander Alekseev <a(dot)alekseev(at)postgrespro(dot)ru> |
| Cc: | PostgreSQL Hackers <pgsql-hackers(at)postgresql(dot)org>, Andres Freund <andres(at)anarazel(dot)de>, Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>, Robert Haas <robertmhaas(at)gmail(dot)com>, Dmitry Dolgov <9erthalion6(at)gmail(dot)com>, Tomas Vondra <tomas(dot)vondra(at)2ndquadrant(dot)com>, David Steele <david(at)pgmasters(dot)net> |
| Subject: | Re: [Patch] Temporary tables that do not bloat pg_catalog (a.k.a fast temp tables) |
| Date: | 2016-08-15 10:23:21 |
| Message-ID: | CAFj8pRC-=KHBnzysX1h1qsA8zAzqTQ3Nw5u1D9C=fQWBBM-Q0Q@mail.gmail.com |
| Views: | Raw Message | Whole Thread | Download mbox | Resend email |
| Thread: | |
| Lists: | pgsql-hackers |
2016-08-15 12:18 GMT+02:00 Aleksander Alekseev <a(dot)alekseev(at)postgrespro(dot)ru>:
> > The global temporary tables has persistent rows in the catalogue. The
> > mapping to files can be marked as special and real mapping should be
> > only in memory.
> >
> > So the changes in catalogue related to global temporary tables are
> > pretty less frequently.
>
> I'm afraid I still don't get it. Let say I have an application that
> does `CREATE TEMP TABLE xx ; DROP TABLE xx` in every session all the
> time. Naturally there is not only one temp table per session. Could you
> explain please in more detail how exactly do these persistent rows help?
>
>
when you use global temporary tables, then you create it only once - like
usual tables.
you don't drop these tables.
Regards
Pavel
> --
> Best regards,
> Aleksander Alekseev
>
| From | Date | Subject | |
|---|---|---|---|
| Next Message | Christoph Berg | 2016-08-15 11:10:57 | Re: [Patch] Temporary tables that do not bloat pg_catalog (a.k.a fast temp tables) |
| Previous Message | Aleksander Alekseev | 2016-08-15 10:18:38 | Re: [Patch] Temporary tables that do not bloat pg_catalog (a.k.a fast temp tables) |