[Dovecot] Using a ramdisk but Timeout while waiting for lock for transaction log file

Hello,

Dovecot 1.2.5, centos 5.4.

We are using NFS for mail, but indexes are local and on a ramdisk.

However I'm getting logs such as:

Mar 02 11:47:14 POP3(USERDELETED): Error: Timeout while waiting for lock for transaction log file /ramdisk/indexes/DOMAINDELETED/USERDELETED/.INBOX/dovecot.index.log

Our NFS is rather busy, and we having other warnings to that affect, but wouldn't have though we'd get timeouts on a ramdisk.

-- Andrew