Which Oracle Enterprise stage read property can be set using db options to tune job performance?
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memsize
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arraysize
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partitionsize
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transactsize
The 'arraysize' property controls how many rows are fetched per network round-trip when reading from Oracle, which significantly impacts performance. Setting a larger array size reduces network overhead but uses more memory. The 'memsize' property is not a standard Oracle Enterprise stage property, 'partitionsize' is not applicable to Oracle reads, and 'transactsize' relates to write operations not reads.
To answer this question, you need to understand the different Oracle Enterprise stage read properties and how they can be used to tune job performance.
Option A) memsize - This option is incorrect. The "memsize" property is used to specify the amount of memory available to the Oracle Enterprise stage for buffering data. It does not directly impact job performance tuning.
Option B) arraysize - This option is correct. The "arraysize" property can be set using database options to tune job performance. It specifies the number of rows that are fetched from the database server in each round trip. By increasing the arraysize, more data can be fetched in a single round trip, which can improve the performance of the job.
Option C) partitionsize - This option is incorrect. The "partitionsize" property is used to control how the data is divided into partitions for parallel processing. It does not directly impact job performance tuning.
Option D) transactsize - This option is incorrect. The "transactsize" property is used to specify the number of rows that are processed in each transaction. It does not directly impact job performance tuning.
The correct answer is B) arraysize. This option is correct because increasing the arraysize can improve the performance of the job by fetching more data in each round trip from the database server.