VERITAS Storage Foundation 4.1 Oracle Administrator's Guide

Using the Monitoring Agent Prerelease 8 September 2005, 8:55am
290 VERITAS Storage Foundation for Oracle Administrator’s Guide
Using the Monitoring Agent
You can use a Monitoring Agent to manage and monitor VxFS file systems, Oracle tablespaces,
and datafile space usage.
The Monitoring Agent monitors the file system space, and when the space usage reaches a
configured threshold value, a predefined action script grows the file system automatically.
The agent can be enabled at boot-time. Each file system monitored has three settings that the
Monitoring Agent needs to know about:
◆ Warning Threshold is a percent value (% of file system used) that determines when the agent
begins warning the administrator of space shortage
◆ Grow Threshold is a percent value (% of file system used) that determines when the agent is to
attempt to grow the file system (when space usage is at a critical level)
◆ Amount is either a percentage or a value in megabytes by which to grow file systems when the
Grow Threshold is reached or exceeded
The VxDBA Monitoring Agent operations are driven from the following files:
◆ /opt/VRTSdbed/lib/dbed_mon_config.base
◆ /etc/vx/vxdba/$ORACLE_SID/dbed_mon_config.$ORACLE_SID
◆ /etc/vx/vxdba/$ORACLE_SID/dbed_mon_fslist.$ORACLE_SID
◆ /etc/vx/vxdba/$ORACLE_SID/dbed_mon_oralist.$ORACLE_SID
◆ /etc/vx/vxdba/$ORACLE_SID/include
Understanding the Monitoring Agent Files
The /opt/VRTSdbed/lib/dbed_mon_config.base file contains the site-level
configuration settings for monitoring all file systems and databases recognized. This configuration
file specifies how often to check for file system and database configuration changes, how often to
check the file space usage, where space usage information gets logged, and the thresholds for
warning and automatically growing the file system.
For example, if you are monitoring a database named PROD, the database-specific file would be
/etc/vx/vxdba/PROD/dbed_mon_config.PROD. This is the first file opened when the
agent is started and contains the default settings for monitoring file systems at the database level.
The Monitoring Agent cannot start without this file. Modify this configuration file if you want to
change the preconfigured settings carried over from the dbed_mon_config.base file to
maintain a different set of settings at the database level.
The files /etc/vx/vxdba/$ORACLE_SID/dbed_mon_fslist.$ORACLE_SID and
/etc/vx/vxdba/$ORACLE_SID/dbed_mon_oralist.$ORACLE_SID are created and
are used for restarting the Monitoring Agent. These files specify the status of the database. The files