[bitbake-devel] [PATCH] prserv: Use WAL mode
Martin Jansa
martin.jansa at gmail.com
Thu Nov 6 13:58:11 UTC 2014
On Wed, Nov 05, 2014 at 04:58:13PM +0000, Richard Purdie wrote:
> Ideally, we want the PR service to have minimal influence from
> queued disk IO. sqlite tends to be paranoid about data loss and
> locks/fsync calls. There is a "WAL mode" which changes the journalling
> mechanism and would appear much better suited to our use case.
>
> This patch therefore switches the database to what WAL mode. With this
^ what = that?
> change, write overhead appears significantly reduced.
>
> Signed-off-by: Richard Purdie <richard.purdie at linuxfoundation.org>
>
> diff --git a/bitbake/lib/prserv/db.py b/bitbake/lib/prserv/db.py
> index 3bdc046..9d6d115 100644
> --- a/bitbake/lib/prserv/db.py
> +++ b/bitbake/lib/prserv/db.py
> @@ -235,6 +235,7 @@ class PRData(object):
> self.connection=sqlite3.connect(self.filename, isolation_level="EXCLUSIVE", check_same_thread = False)
> self.connection.row_factory=sqlite3.Row
> self.connection.execute("pragma synchronous = off;")
> + self.connection.execute("PRAGMA journal_mode = WAL;")
> self._tables={}
>
> def __del__(self):
>
>
> --
> _______________________________________________
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> bitbake-devel at lists.openembedded.org
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--
Martin 'JaMa' Jansa jabber: Martin.Jansa at gmail.com
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