Some Centos users are complaining about the following error when executing SUDO:
audit_log_user_command(): Connection refused
However, this is nothing to worry about. Centos kernel doesn’t have this feature enabled for audit and this is why it’s complaining. For example, Fedora has compiled this feature into own kernel and no problems are reported. Until a “bug” fix is released feel free to ignore this error message.
We have seen great performance on using ReiserFS for mail system spools and in our tests ReiserFS file system spool for Postfix queues was very fast. For best performance we used
notail, noatime mount options in /etc/fstab file.
Full example:
/dev/sda2/usr reiserfs notail,noatime,rw,auto 0 0
notatime - turns off atimes calls, reduces IO and greatly increases file system performance
notail - increases performance of ReiserFS especially for small files - works great for mail servers, web servers and caches. This option disables file pckaging in tree.
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