| From: | Alvaro Herrera <alvherre(at)alvh(dot)no-ip(dot)org> |
|---|---|
| To: | Michael Banck <michael(dot)banck(at)credativ(dot)de> |
| Cc: | Magnus Hagander <magnus(at)hagander(dot)net>, Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>, Andres Freund <andres(at)anarazel(dot)de>, David Steele <david(at)pgmasters(dot)net>, PostgreSQL-development <pgsql-hackers(at)postgresql(dot)org> |
| Subject: | Re: pgsql: Validate page level checksums in base backups |
| Date: | 2018-04-05 13:17:48 |
| Message-ID: | 20180405131748.3zrjzedxmhkr445v@alvherre.pgsql |
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| Lists: | pgsql-committers pgsql-hackers |
Michael Banck wrote:
> Hi,
> > Do we have a precedent somewhere for how we do this, or does our test
> > framework already have a way to do it? How are all the actual data
> > directories etc cleaned up?
>
> They (and the base backups) are getting purged on success of the whole
> testsuite. So to be clear - we are not leaving behind 1 GB of disk space
> on success, but we use 1 GB of disk space during the test.
Yeah, but it means you force the OS to keep 1 GB of useless dung in
cache. I would hope that creating 40 MB, deleting those, then creating
further 40 MB (lather, rinse, repeat) would not overall evict 1 GB from
my OS cache. Unless the OS keeps the unlinked files in cache, which
would be stupid.
--
Álvaro Herrera https://www.2ndQuadrant.com/
PostgreSQL Development, 24x7 Support, Remote DBA, Training & Services
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