Oracle Automatic Storage Management

This template assesses the status and performance of an Oracle Automatic Storage Management (ASM) volume manager and file system by retrieving performance data from the built-in Oracle views.

Prerequisites

This template is included with SolarWinds SAM during installation. It is also posted in the SolarWinds online IT community, THWACK.

To use this template, download the Oracle Client from the SolarWinds Customer Portal and install it on the main Orion server.

If you have Additional Polling Engines (APEs), install the Oracle client software on those machines also.

Credentials

An Oracle user name and password with read access to the Oracle tables: v_$asm_diskgroupandv_$asm_disk.

If you have issues connecting to Oracle databases, see Use the SAM Oracle Database template and Oracle User Experience monitor without ODBC article in the SolarWinds Success Center.

Monitored components

To learn more about default component monitors included in SAM, see SAM online help.

Components without predetermined threshold values provide guidance such as "Use the lowest threshold possible" or "Use the highest threshold possible" to help you find an appropriate threshold for your application. For more information, see Using the Orion APM Min/Max/Average statistics data for creating threshold settings in the SolarWinds Success Center.

Before using this template, you should provide the correct disk group name in all SQL queries by changing the last line of the SQL query in all monitors:

WHERE A.NAME LIKE 'DISK_GROUP_NAME'

where DISK_GROUP_NAME – disk group name which you want to monitor. For example:

WHERE A.NAME LIKE 'DATA'

To get the names of disk groups, run the following command from Oracle SQL plus utility:

SELECT NAME FROM V$ASM_DISKGROUP;

Mount Status

This component monitor returns the status of the disk relative to group mounts.

Possible values:

  • 0 – Opened - Disk is present in the storage system and is being accessed by Automatic Storage Management (ASM). This is the normal state for disks in a database instance which are part of a Disk Group being actively used by the instance.
  • 1 – Cached - Disk is present in the storage system, and is part of a disk group being accessed by the Automatic Storage Management instance. This is the normal state for disks in an ASM instance which are part of a mounted disk group.
  • 2 – Closing - ASM is in the process of closing this disk.
  • 3 – Closed - Disk is present in the storage system but is not being accessed by ASM.
  • 4 – Ignored - Disk is present in the system, but is ignored by ASM because of one of the following:
    • The disk is detected by the system library, but is ignored because an ASM library discovered the same disk.
    • ASM determined that the membership claimed by the disk header is no longer valid.
  • 5 – Missing - ASM metadata indicates that the disk is known to be part of the ASM disk group, but no disk in the storage system was found with the indicated name.
  • 6 – Unknown

Header Status

This component monitor returns status of the disk as seen by discovery.

Possible values:

  • 0 – Member - Disk is a member of an existing disk group. No attempt should be made to add the disk to a different disk group. The ALTER DISKGROUP statement will reject such an addition unless overridden with the FORCE option.
  • 1 – Former - Disk was once part of a disk group but has been dropped cleanly from the group. It may be added to a new disk group with the ALTER DISKGROUP statement.
  • 2 – Provisioned - Disk is not part of a disk group and may be added to a disk group with the ALTER DISKGROUP statement. The PROVISIONED header status is different from the CANDIDATE header status in that PROVISIONED implies that an additional platform-specific action has been taken by an administrator to make the disk available for ASM.
  • 3 – Candidate - Disk is not part of a disk group and may be added to a disk group with the ALTER DISKGROUP statement.
  • 4 – Foreign - Disk contains data created by an Oracle product other than ASM. This includes datafiles, logfiles, and OCR disks.
  • 5 – Incompatible - Version number in the disk header is not compatible with the ASM software version.
  • 6 – Conflict - ASM disk was not mounted due to a conflict.
  • 7 – Unknown - ASM disk header was not read.

Mode Status

This component monitor returns status about which kinds of I/O requests are allowed to the disk.

Possible values:

  • 0 – Online - Disk is online and operating normally. Reads and writes are attempted.
  • 1 – Offline - Disk is offline and access to data is not permitted. Reads and writes are not attempted. An offline disk remains logically part of its disk group.
  • 2 – Unknown - ASM disk mode is not known (typically the disk is not mounted).

State

This component monitor returns state of the disk with respect to the disk group.

Possible values:

  • 0 – Normal - Disk is online and operating normally.
  • 1 – Adding - Disk is being added to a disk group, and is pending validation by all instances that have the disk group mounted.
  • 2 – Dropping - Disk has been manually taken offline and space allocation or data access for the disk halts. Rebalancing will commence to relocate data off the disks to other disks in the disk group. Upon completion of the rebalance, the disk is expelled from the group.
  • 3 – Dropped - Disk was fully expelled from the disk group.
  • 4 – Forcing - Disk is being removed from the disk group without attempting to offload its data. The data will be recovered from redundant copies, where possible.
  • 5 – Hung - Disk drop operation cannot continue because there is insufficient space to relocate the data from the disk being dropped.
  • 6 – Unknown - ASM disk state is not known (typically the disk is not mounted).

Used Space (%)

This component monitor returns the percentage of the used capacity of the disk group.

Used Space (MB)

This component monitor returns the used capacity of the disk group (in MBs).

Read Requests

This component monitor returns the total number of I/O read requests for the disk.

By default, this monitor has the Count statistic as difference box checked. The returned value will only show the results since the last polling period.

Write Requests

This component monitor returns the total number of I/O write requests for the disk.

By default, this monitor has the Count statistic as difference box checked. The returned value will only show the results since the last polling period.

Failed Read Requests

This component monitor returns the total number of failed I/O read requests for the disk.

By default, this monitor has the Count statistic as difference box checked. The returned value will only show the results since the last polling period.

Failed Write Requests

This component monitor returns the total number of failed I/O write requests for the disk.

By default, this monitor has the Count statistic as difference box checked. The returned value will only show the results since the last polling period.

Bytes Read

This component monitor returns the total number of bytes read from the disk.

By default, this monitor has the Count statistic as difference box checked. The returned value will only show the results since the last polling period.

Bytes Written

This component monitor returns the total number of bytes written to the disk.

By default, this monitor has the Count statistic as difference box checked. The returned value will only show the results since the last polling period.