The following bug has been logged on the website:
Bug reference: 8236
Logged by: Ivan
Email address: akifo(at)akifo(dot)net
PostgreSQL version: 8.4.4
Operating system: CEntOS 5.4
Description:
Sync method ":open_datasync" daclared as supported (
http://www.postgresql.org/docs/8.4/static/runtime-config-wal.html )
But after changing this parameter I've got the following error:
FATAL: invalid value for parameter "wal_sync_method": "open_datasync"
HINT: Available values: fsync, fdatasync, open_sync.