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.


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.