Mercurial > p > roundup > code
diff CHANGES.txt @ 4887:05c857e5dbed
New rdbms configuration option 'isolation_level'
See discussion in http://issues.roundup-tracker.org/issue2550806
| author | Ralf Schlatterbeck <rsc@runtux.com> |
|---|---|
| date | Sun, 06 Apr 2014 11:11:04 +0200 |
| parents | 96a2c825c8d6 |
| children | 5dbeea79a3db |
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--- a/CHANGES.txt Fri Apr 04 08:09:30 2014 +0200 +++ b/CHANGES.txt Sun Apr 06 11:11:04 2014 +0200 @@ -32,6 +32,14 @@ value as an ID when evaluating form values -- not as a key. Specifying try_id_parsing='no' for these Link/Multilink will skip the ID step, default is 'yes'. +- New configuration option 'isolation_level' in rdbms section. Currently + supported for Postgres and mysql, sets the transaction isolation level. + Wrong history entries for concurrent database updates observed in + issue2550806 can be prevented by setting this to 'repeatable read' if + you want to pay the performance penalty. We test this behaviour in the + regression tests for Postgres but not currently for mysql. + See http://www.postgresql.org/docs/9.1/static/transaction-iso.html + (Ralf Schlatterbeck) Fixed: