By default, Linux servers running the ext3 file system flush the data to disk every five seconds.

  1. If the Directory Server is running on a Linux server using the ext3 file system, consider editing the mount options for that file system to include the following command. 
    commit=1

    This variable changes the flush frequency from five seconds to one second.

  2. You should also set the flush frequency in the /etc/fstab file.
    Changing the mount command alone does not survive across reboots.