Search Postgresql Archives

Re: Will modifications to unlogged tables also be flused to disk?

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

 



Clemens Eisserer <linuxhippy@xxxxxxxxx> wrote:

> Hi,
> 
> I would like to use postgresql's unlogged tables on an embedded system
> to avoid frequent writes to flash memory.
> While documentation clearly states that unlogged tables don't have to
> go through the WAL, it doesn't mention what happens to the data when
> it is written directly to the database.
> 
> Will unlogged tables also cause sync/fsync calls, or will they stay in
> the page cache of the system as they will be lost anyway after a
> recovery?
> 
> Thank you in advance, Clemens

They will lost after a crash, but after a regular shutdown / restart all
data in the table.


Andreas
-- 
Really, I'm not out to destroy Microsoft. That will just be a completely
unintentional side effect.                              (Linus Torvalds)
"If I was god, I would recompile penguin with --enable-fly."   (unknown)
Kaufbach, Saxony, Germany, Europe.              N 51.05082°, E 13.56889°


-- 
Sent via pgsql-general mailing list (pgsql-general@xxxxxxxxxxxxxx)
To make changes to your subscription:
http://www.postgresql.org/mailpref/pgsql-general




[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]
[Index of Archives]     [Postgresql Jobs]     [Postgresql Admin]     [Postgresql Performance]     [Linux Clusters]     [PHP Home]     [PHP on Windows]     [Kernel Newbies]     [PHP Classes]     [PHP Books]     [PHP Databases]     [Postgresql & PHP]     [Yosemite]
  Powered by Linux