CA APM Server Performance Impact

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CA APM Server Performance Impact

Once a minute the CA Executive Insight server queries the CA APM server for the business indicator data that has been configured for that connector. More business indicators increase the number of requests increasing CPU use.

To find the number of web service calls and their duration, parse the IntroscopeEnterpriseManager.log file.

Note: For more information about monitoring web services, see the 'CA Application Performance Management Sizing and Performance Guide'.

Performance varies with each version of CA APM.

For CA APM 9.0.6, you can monitor the impact of the webservices queries on your CA APM server. Look at the Response Time and Responses Per Interval metrics under the Workstation Investigator Browse tab:
Custom Metric Agent(Virtual) > Enterprise Manager > WebService > Polling > introscope-web-services/services/MetricsDataService
For CA APM 9.1 or 9.0 with 500 business indicators, you can expect a 2-second or 3-second spike in CPU use per minute.

Number of BI's per CA APM Connector	CA APM Server CPU Overhead (see Note)	Interval Length (seconds)
< 500	40%	1-3
1000	100%	4-8
2000	200%	8-10
4000	400%	12-16

Note: The CA APM server CPU overhead percentages are relative to one CPU core.

For releases after CA APM 9.1, you can expect significant improvement in the performance. Support for making bulk web service calls to CA APM was added.

Number of BI's per CA APM Connector	CA APM Server CPU Overhead (see Note)	Interval Length (seconds)
< 500	5%	0.3
1000	10%	0.6
2000	30%	1.0
4000	80%	2.0

Note: The CA APM Server CPU overhead percentages are relative to one CPU core.

To find the number of web service calls and their duration, parse the IntroscopeEnterpriseManager.log file.

For releases after CA APM 9.1.1, there is session-based authentication for the web service calls from CA Executive Insight to CA APM. Therefore, the periodical authentication calls by CA APM to its authentication provider, such as CA EEM or LDAP, are eliminated.

CA Executive Insight detects the CA APM version that is used for the connector. If you use a version before CA APM 9.1.1, then authentication calls are made for each web service request from CA Executive Insight to CA APM. If you use CA APM 9.1.1 or later, CA Executive Insight is automatically detected session-based authentication is used.