Database disk usage

Purpose

HANA database uses disks for persistence. To run out of disk space is to avoid at all cost to maintain the service running.
This monitor will check disk used space of the HANA database at different levels.

Configuration hints

Create a rule in the surveillance table for each type of usage you want to monitor.

Use host and service filter to customize the monitoring for a given node or service

Disk usage is computed at differents levels:

Node level: The combined usage of all services

Select TOTAL in service column to check global usage of a particular storage type

Service level: The usage of each individual service.

Select ANY in service column to cover all services

Or select a particular service

Disk utilizations are split into several types: DATA, LOG, TRACE, DATA_BACKUP and LOG_BACKUP

For each category, you can monitor the current disk usage as well as the delta usage over a period of time (for services).

Atomic fields

Auto clear
If set, the generated alarms will be automatically cleared from the console if the alarm condition is not fulfilled anymore

Surveillance table

Parameter	Description
Active	If checked, the rule is enabled and will be processed
Usage	The type of usage of the disk
Host	Can be used to restrict the monitoring to a given host (multi instance case). A star (‘*’) will match any host
Service	Defines which service is monitored. A star (‘*’) will match any service, and therefore, it will calculate the combined usage of all services. Otherwise, it is the usage of the specified service that will be calculated
Max used space (MB or %)	The alarm threshold for the current disk usage. You can specify percentage or absolute value in Mega Bytes
Max used space delta (MB or %)	The alarm threshold on the delta disk usage increase over the period set in the “Delta time” field. Example: Send an alarm if the disk usage increases by 20% in the last 5 min
Delta time (min)	The period of time used to make a delta comparison of the disk usage
Severity	Defines the level of severity of the alarm that will be generated if one of the thresholds is reached
Alarm tag	You can define some text to use as a prefix of the alarm message generated by the current rule
Alarm	Defines if an alarm has to be generated for the given rule
Metric	Defines if a metric has to be generated for the given rule

Generated metrics

metricId	metricUnit	metricTarget	metricDescription
DISK_USED_SPACE	Mega Bytes	HOST/TYPE	Sends disk usage per type of storage
DISK_USED_SPACE_PER_SERVICE	Mega Bytes	HOST/SERVICE/TYPE	Sends disk usage per type of storage and service