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bitbake: prserv: Use WAL mode

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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 use WAL mode. With this
change, write overhead appears significantly reduced.

(Bitbake rev: 90b05e79764b684b20ce8454e89f05763b02ac97)

Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
This commit is contained in:
Richard Purdie
2014-11-05 16:58:13 +00:00
parent c72d8913b3
commit c35cecebc6
1 changed files with 1 additions and 0 deletions
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bitbake/lib/prserv/db.py
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@@ -235,6 +235,7 @@ class PRData(object):
self.connection=sqlite3.connect(self.filename, isolation_level="EXCLUSIVE", check_same_thread = False) self.connection=sqlite3.connect(self.filename, isolation_level="EXCLUSIVE", check_same_thread = False)
self.connection.row_factory=sqlite3.Row self.connection.row_factory=sqlite3.Row
self.connection.execute("pragma synchronous = off;") self.connection.execute("pragma synchronous = off;")
self.connection.execute("PRAGMA journal_mode = WAL;")
self._tables={} self._tables={}
def __del__(self): def __del__(self):