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: - Instance level: The combined usage of all services - Service level: The usage of each individual service. Disk utilizations are split into several categories: 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.

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_DATA_USED_SPACE	Percent or Mega Bytes	HOST	Sends disk usage of DATA
DISK_LOG_PERCENTAGE_USED	Percent or Mega Bytes	HOST	Sends disk usage ratio of LOG
DISK_LOG_USED_SPACE	Percent or Mega Bytes	HOST	Sends disk usage of LOG
DISK_TRACE_PERCENTAGE_USED	Percent or Mega Bytes	HOST	Sends disk usage ratio of TRACE
DISK_TRACE_USED_SPACE	Percent or Mega Bytes	HOST	Sends disk usage of TRACE
DISK_DATA_BACKUP_PERCENTAGE_USED	Percent or Mega Bytes	HOST	Sends disk usage ratio of DATA_BACKUP
DISK_DATA_BACKUP_USED_SPACE	Percent or Mega Bytes	HOST	Sends disk usage of DATA_BACKUP
DISK_LOG_BACKUP_PERCENTAGE_USED	Percent or Mega Bytes	HOST	Sends disk usage ratio of LOG_BACKUP
DISK_LOG_BACKUP_USED_SPACE	Percent or Mega Bytes	HOST	Sends disk usage of LOG_BACKUP