Workflow Basics Guide

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Understanding Performance Counters

All transformations have some basic counters that indicate the number of input rows, output rows, and error rows.

Source Qualifier, Normalizer, and target transformations have additional counters that indicate the efficiency of data moving into and out of buffers. Use these counters to locate performance bottlenecks.

Some transformations have counters specific to their functionality. For example, each Lookup transformation has a counter that indicates the number of rows stored in the lookup cache.

When you view the performance details file, the first column displays the transformation name as it appears in the mapping, the second column contains the counter name, and the third column holds the resulting number or efficiency percentage. If you use a Joiner transformation, the first column shows two instances of the Joiner transformation:

<Joiner transformation
> [M]
. Displays performance details about the master pipeline of the Joiner transformation.

<Joiner transformation
> [D]
. Displays performance details about the detail pipeline of the Joiner transformation.

When you create multiple partitions, the Integration Service generates one set of counters for each partition. The following performance counters illustrate two partitions for an Expression transformation:

Transformation Name	Counter Name	Counter Value
EXPTRANS [1]	Expression_input rows	8
EXPTRANS [1]	Expression_output rows	8
EXPTRANS [2]	Expression_input rows	16
EXPTRANS [2]	Expression_output rows	16

When you increase the number of partitions, the number of aggregate or rank input rows may be different from the number of output rows from the previous transformation.

The following table describes the Aggegator and Rank Transformation counters/descriptions that may appear in the Session Performance Details area or in the performance details file:

Counters	Description
Aggregator/Rank_ inputrows	Number of rows passed into the transformation.
Aggregator/Rank_ outputrows	Number of rows sent out of the transformation.
Aggregator/Rank_ errorrows	Number of rows in which the Integration Service encountered an error.
Aggregator/Rank_ readfromcache	Number of times the Integration Service read from the index or data cache.
Aggregator/Rank_ writetocache	Number of times the Integration Service wrote to the index or data cache.
Aggregator/Rank_ readfromdisk	Number of times the Integration Service read from the index or data file on the local disk, instead of using cached data.
Aggregator/Rank_ writetodisk	Number of times the Integration Service wrote to the index or data file on the local disk, instead of using cached data.
Aggregator/Rank _newgroupkey	Number of new groups the Integration Service created.
Aggregator/Rank _oldgroupkey	Number of times the Integration Service used existing groups.

The following table describes the Lookup Transformation counters/descriptions that may appear in the Session Performance Details area or in the performance details file:

Counters	Description
Lookup _inputrows	Number of rows passed into the transformation.
Lookup _outputrows	Number of rows sent out of the transformation.
Lookup _errorrows	Number of rows in which the Integration Service encountered an error.
Lookup _rowsinlookupcache	Number of rows stored in the lookup cache.

The following table describes the Master and Detail Joiner Transformation counters/descriptions that may appear in the Session Performance Details area or in the performance details file:

Counters	Description
Joiner _inputMasterRows	Number of rows the master source passed into the transformation.
Joiner _inputDetailRows	Number of rows the detail source passed into the transformation.
Joiner _outputrows	Number of rows sent out of the transformation.
Joiner _errorrows	Number of rows in which the Integration Service encountered an error.
Joiner_ readfromcache	Number of times the Integration Service read from the index or data cache.
Joiner_ writetocache	Number of times the Integration Service wrote to the index or data cache.
Joiner _readfromdisk	Number of times the Integration Service read from the index or data files on the local disk, instead of using cached data. The Integration Service generates this counter when you use sorted input for the Joiner transformation.
Joiner _writetodisk	Number of times the Integration Service wrote to the index or data files on the local disk, instead of using cached data. The Integration Service generates this counter when you use sorted input for the Joiner transformation.
Joiner _readBlockFromDisk	Number of times the Integration Service read from the index or data files on the local disk, instead of using cached data. The Integration Service generates this counter when you do not use sorted input for the Joiner transformation.
Joiner _writeBlockToDisk	Number of times the Integration Service wrote to the index or data cache. The Integration Service generates this counter when you do not use sorted input for the Joiner transformation.
Joiner _seekToBlockInDisk	Number of times the Integration Service accessed the index or data files on the local disk. The Integration Service generates this counter when you do not use sorted input for the Joiner transformation.
Joiner _insertInDetailCache	Number of times the Integration Service wrote to the detail cache. The Integration Service generates this counter if you join data from a single source. The Integration Service generates this counter when you use sorted input for the Joiner transformation.
Joiner _duplicaterows	Number of duplicate rows the Integration Service found in the master relation.
Joiner _duplicaterowsused	Number of times the Integration Service used the duplicate rows in the master relation.

The following table describes All Other Transformation counters/descriptions that may appear in the Session Performance Details area or in the performance details file:

Counters	Description
Transformation _inputrows	Number of rows passed into the transformation.
Transformation _outputrows	Number of rows sent out of the transformation.
Transformation _errorrows	Number of rows in which the Integration Service encountered an error.

If you have multiple source qualifiers and targets, evaluate them as a whole. For source qualifiers and targets, a high value is considered 80-100 percent. Low is considered 0-20 percent.

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Table of Contents

Workflow Basics Guide

Workflow Basics Guide

Understanding Performance Counters

Understanding Performance Counters