13 Global Data Services
This chapter provides information about the Global Data Service metrics.
Global Data Services (GDS) provide dynamic load balancing, failover, and centralized service management for a set of replicated databases that offer common services. The sections in this chapter provide information about the metrics available for the following GDS targets:
- Global Service Manager
- Global Data Service Pool
Global Service Manager
This chapter provides information about the metric categories available for the Global Service Manager target.
A Global Service Manager is the central software component of GDS, which provides service-level load balancing, failover, and centralized management of services in the GDS configuration.
Global Service Performance
This section provides information on the metrics in the Global Service Performance category.
| Target Version | Evaluation and Collection Frequency |
|---|---|
| 12c and later | Every 5 minutes |
| Metric Name | Description | Unit |
|---|---|---|
| Average Response Time | Elapsed time per user call. | Milliseconds |
| CPU IO Violations | Count of CPU IO threshold violations. | None |
| CPU Load | CPU utilization | Percentage |
| Calls Per Second | Number of logins, parses, or execute calls per second during the sample period. | None |
| Collected Region | Name of the GSM region. | None |
| Latency | Network latency between database region and GSM region. | Milliseconds |
| Latency Region | Name of the GSM region for which latency is computed. | None |
| Master | Global Master GSM | None |
| Region Master | Regional Master GSM | None |
| Runtime Load Balance | Percentage of workload for runtime load balancing purposes. | None |
| Session Count | Current session count over the past 30 seconds. | None |
Load
This section provides information on the metrics in the Load category.
| Target Version | Evaluation and Collection Frequency |
|---|---|
| 12c and later | Every 5 minutes |
| Metric Name | Description | Unit |
|---|---|---|
| Connections Established (per min) | Count of connections established per minute. | None |
| Connections Refused (per min) | Count of connections refused per minute. | None |
General Status
This section provides information on the metrics in the General Status category.
| Target Version | Evaluation and Collection Frequency |
|---|---|
| 12c and later | Every 5 minutes |
| Metric Name | Description | Unit |
|---|---|---|
| Host | GSM host | None |
| Port | GSM port | None |
| Region | Region name | None |
| Region Master | Regional master GSM | None |
| Start Date | GSM start time | Date |
| TNSPING Response Time | Response time of TNSPING test from GDS home to GSM server. | Milliseconds |
| TNSPING Status | Status of TNSPING test from GDS home to GSM server. | Status (0 or 1) |
Global Data Service Pool
This chapter provides information about the metric category available for the Global Data Service Pool target.
A Global Data Services Pool is a named subset of databases within a GDS configuration that provides a unique set of global services and belongs to the same administrative domain. Partitioning of GDS configuration databases into pools simplifies service management and provides higher security by allowing each pool to be administered by a different administrator.
Global Service Status
This section provides information on the metrics in the Global Service Status category.
| Target Version | Evaluation and Collection Frequency |
|---|---|
| 12c and later | Every 5 minutes |
| Metric Name | Description | Unit |
|---|---|---|
| Preferred Database(s) | Preferred list of instances where the service should run. If the role is specified to a service, then all the instances matching the role in the GDS configuration are considered preferred. | None |
| Running Database(s) | Instances where the service is running. | None |
| Service Name | Global service name | None |
| Service Status | Status of global service based on running and
preferred instances:
|
None |