Performance Tuning for Content Manager

Chapter 7. Tuning operating systems for Content Manager 161

For tuning mount options, the

noatime

mount option can improve I/O performance

in some cases. For example, directories with many files might benefit from

avoiding updates for the access time of the file. When noatime is not specified,

every time a file is accessed, its inode information is updated to reflect the last

access time that incurs a write to the file system metadata. To change the setting,

edit the file system entry in /etc/fstab, appending noatime to the existing entry or

replacing .defaults. With all I/O stopped, the change can be applied by typing:

umount <mount point>

mount <mount point>

Another mounting consideration is how to journal on journal file systems.

Journalling helps guarantee the consistency of data written to disk and reduces

recovery time after a crash. The default option, data=ordered, offers the best

access time while ensuring consistency. In storage devices with backup power or

in situations where data consistency is not critical, data=writeback offers faster

access time at the cost of consistency after a crash.

7.3.7 Configure disk I/O for effective usage

For an I/O bound system, you can reduce I/O contention by distributing I/O to

multiple disks. We recommend installing the following items to separate physical

disks if the resource is available:

 Library Server database

 Library Server database log

 Resource Manager database

 Resource Manager database log

 Resource Manager LBOSDATA

 Resource Manager staging area

 Content Manager log file

Consider how your disks are attached to the system. Do not move the bottleneck

from the disk to the disk controller card. Distribute the load over the disk

controller cards.

7.4 Tuning the Windows operating system

You can make certain configuration changes to increase performance of a

Content Manager system running on the Windows platform. This section covers

the changes you can make to maximize your system performance, and the areas

you need to check to ensure optimal system performance:

 Disable Indexing Service.

 Disable Computer Browser Service.