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Guidelines

Information
Announcement Support for this product will end on December 22, 2025. To monitor Oracle databases, we recommend that you use PATROL for Oracle Enterprise Database.

Enqueue Resources in Use (LocksUsed)


The LocksUsed parameter reports the percentage of used enqueue resources.

Recommendations

If there is a contention on enqueue resources, increase the init.ora enqueue_resources parameterWhen setting the enqueue_resources parameter, allow one process per resource, regardless of the number of sessions or cursors using the resource, not one per lock. 

Use the following table to select the appropriate value for enqueue_resources:

If init.ora processes value is...

Set enqueue_resources default value to...

3 or less

20

between 4 and 10

[(processes - 3) * 5] 20

greater than 10

[(processes - 10) * 2] 55

Do not assign enqueue_resources a value greater than the sum of the init.ora parameters (dml_locks ddl_locks).

Default parameter attributes

Attribute

Default value

Application class

ORACLE_CAPACITY

Command type

not applicable

Platform

all

Icon style

Gauge

Unit

percentage of used enqueue resources

Border range

undefined

Alarm1 range

undefined

Alarm2 range

undefined

Scheduling(poll time)

poll time of collector

Active at installation

Yes

Parameter type

Consumer

Value set by

CollCapacity

BMC ProactiveNet Performance Management properties

Attribute

Default value

Monitor type

Oracle Database Capacity

Key Performance Indicator

No

Monitor for abnormalities

No

Graph by default

No

Availability

No

Response time

No

Normal distribution

Yes

Statistical

Yes

 

Tip: For faster searching, add an asterisk to the end of your partial query. Example: cert*

BMC PATROL for Oracle Database Monitoring 9.7