I/O Tracing Data
I/O data collection traces input/output system calls including reads and writes. It measures
the duration of the calls, tracks the files and descriptors, and the amount of data transferred. You
can use the I/O metrics to identify the files, file handles, and call stacks that have high byte
transfer volumes and total thread time.
Table 2-4 I/O Tracing Metrics
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Read Bytes
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The sum of the number of bytes read in each call to the read functions.
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Write Bytes
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The sum of the number of bytes written in each call to the write functions.
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Read Count
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Number of times read calls were made.
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Write Count
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Number of times write calls were made.
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Other I/O Count
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Number of times other IO calls were made
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I/O Error Count
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Number of errors made during IO calls
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Read Time
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Number of seconds spent reading data
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Write Time
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Number of seconds spent writing data
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Other I/O Time
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Number of seconds spent performing other IO calls
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I/O Error Time
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Number of seconds spent in IO errors
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