onstat -g iof command: Print asynchronous I/O statistics

Use the onstat -g iof command to display the asynchronous I/O statistics by chunk or file.

This command is similar to the onstat -D command, except that onstat -g iof also displays information on nonchunk files. It includes information about temporary files and sort-work files.

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Syntax:

>>-onstat-- -g--iof--------------------------------------------><

Example output

Figure 1. onstat -g iof command output
AIO global files:
gfd pathname      bytes read   page reads   bytes write   page writes  io/s
3   rootdbs       1918976      937          145061888     70831        36.5

      op type     count         avg. time
      seeks       0             N/A
      reads       937           0.0010
      writes      4088          0.0335
      kaio_reads  0             N/A
      kaio_writes 0             N/A

Output description

gfd
Global file descriptor number for this chunk or file.
pathname
The pathname of the chunk or file.
bytes read
Number of byte reads that have occurred against the chunk or file.
page reads
Number of page reads that have occurred against the chunk or file.
bytes write
Number of byte writes that have occurred against the chunk or file.
page writes
Number of page writes that have occurred against the chunk or file.
io/s
Number of I/O operations that can be performed per second. This value represents the I/O performance of the chunk or file.
op type
Type of operation.
count
Number of times the operation occurred.
avg time
Average time the operation took to complete.

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