[syslog-ng] Syslog-Ng MySQL Performance Problem

Hi, I've had a Syslog-NG Central Logserver -> MySQL setup for nearly 2 years now but am finding it has developed a performance problem with a backed up pipe so I'm thinking of using batched inserts to try to improve the db processing performance. Before I go and code this myself, are there any good generic solutions, somebody must have done this batched inserts before, I saw something on the mailing list once I think but can't see it now... Any other suggestions would also be welcome before I go off and do this. Thanks -h -- Hari Sekhon