tang-IT ARM

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Agent features

ARM standard features

The tang-IT ARM agent implements the full set of features defined by the ARM 4.0 interface specification:

• Supports language bindings for C and Java.
• Supports both implicit and explicit response time measurement using start/stop (implicit) and report (explicit) mechanisms.
• Correlation of transactions with parent/child relationships.
• Definition data for ARM application, ARM transaction and ARM metric types.
• Up to 20 name/value properties (name=value) for application and transaction definition types and runtime instances.
• URI support for transaction definitions and runtime instances.
• Transaction metrics like counters, gauges, numeric IDs and simple strings.
• Error handling support at API level.
• Supports finer granularity of transaction measurements:
  • measuring time spent waiting for some resource to be available (blocked transactions).
  • binding threads to transactions if multiple threads are working on a transaction.
• Supports predefined definition data IDs (ARM 3.0 model of definition data).

tang-IT ARM specific features

In addition to the features defined by the ARM 4.0 interface standard, tang-IT ARM provides the following features:

Semantic features

• ARM 2.0 integration into the ARM 4.0 environment for legacy instrumentations.
• Application instance measurement support (application running time).
• Transaction response time histograms.
• Statistical transaction metrics such as mean, median, deviation of response time of a set of transactions.
• Online statistical transaction metrics accessible through commonly used remote technologies (SNMP, CORBA).

Technical features

• Supports single- and multi-threaded environments.
• Transaction response time measurement in nano seconds granularity (platform dependent).
• Mechanism for reporting tang-IT ARM internal errors (configuration or runtime errors) to a central management entity.
• Modular architecture for transport, storage and retrieval of measured ARM data:
  • Decoupled delivery (shared memory or TCP/IP) of ARM data to the storage module through dedicated ARM data collection processes per host(s).
  • Ability to deliver transaction data to the storage module directly from the application if running a separate process on the application host is not possible.
  • Choice between different storage backends (like XML files or databases).
  • Frontend to retrieve ARM data from any storage backend.
  • C++ interfaces for retrieving measured ARM data allowing to write customer specific dedicated analysis tools.
• Various analysis tools:
  • Command line tools.
  • CGI frontend.