Informix onstat命令大全

The onstat utility reads shared-memory
structures and provides statistics about the database server at the
time that the command runs.

You can combine multiple onstat option flags in a single command. The contents of
shared memory might change as the onstat output
displays. The onstat utility does not place any
locks on shared memory, so running the utility does not affect performance.

You use SQL
administration API commands that are equivalent to onstat commands.

• onstat Portal: onstat Utility Commands Sorted by Functional Category
  The information in this topic lists onstat commands
  that are sorted by functional category.

• Monitor the database server status
  To monitor the database server status, view the heading
  of the onstat command.

• onstat command syntax
  The complete syntax for the onstat command,
  including information about the interactive mode and how to have options
  to execute repeatedly.

• onstat command: Equivalent to the onstat -pu command
  If you invoke onstat without any options,
  the command is interpreted as onstat -pu (the -p option
  and the -u option).

• onstat – command: Print output header
  All onstat output includes
  a header. The onstat – command displays only the
  output header and the value that is returned from this command indicates
  the database server mode.

• onstat — command: Print onstat options and functions
  Use the onstat — command to display
  a listing of all of the onstat options and their
  functions. You cannot combine this option with any other flag.

• Running onstat Commands on a Shared Memory Dump File
  You can run onstat commands against
  a shared memory dump file. The shared memory dump file can be produced
  explicitly by using the onstat -o command. If the DUMPSHMEM
  configuration parameter is set to 1 or set to 2, the dump file is
  created automatically at the time of an assertion failure.

• onstat -a command: Print overall status of the database server
  Use the onstat -a command
  to display information about the status of the database server. This
  command does not display information about all of the onstat options,
  only about those onstat options used for initial troubleshooting.

• onstat -b command: Print buffer information for buffers in use
  Use the onstat -b option to display
  information about the buffers that are currently in use, including
  the total number of resident pages in the buffer pool.

• onstat -B command: Prints information about used buffers
  Use the onstat -B option to display
  information about buffers that are not on the free-list.

• onstat -c command: Print ONCONFIG file contents
  Use the onstat -c command to display
  the contents of the ONCONFIG file.

• onstat -C command: Print B-tree scanner information
  Use the -C command to display information
  about the B-tree scanner subsystem and each B-tree scanner thread.

• onstat -d command: Print chunk information
  Use the onstat -d command to show information
  about chunks in each storage space.

• onstat -D command: Print page-read and page-write information
  Use the onstat -D command to display
  page-read and page-write information for the first 50 chunks in each
  space.

• onstat -f command: Print dbspace information affected by dataskip
  Use the -f command to list the dbspaces
  that the dataskip feature currently affects.

• onstat -F command: Print counts
  Use the onstat -F command to display
  a count for each type of write that flushes pages to disk.

• onstat -g monitoring options
  The options that you can use with onstat -g command
  are used for support and debugging only. You can include only one
  of these options in the onstat -g command.

• onstat -G command: Print TP/XA transaction information
  Use the onstat -G command to display
  information about global transactions generated through the TP/XA library.

• onstat -h command: Print buffer header hash chain information
  Use the onstat -h command to display
  information about the buffer header hash chains (sometimes called
  "hash buckets") that are used to access pages in each buffer pool.

• onstat -i command: Initiate interactive mode
  Use the onstat -i command to put the onstat utility
  in the interactive mode.

• onstat -j command: Provide onpload status information
  Use the onstat -j command to provide
  information about the status of an onpload job.

• onstat -k command: Print active lock information
  Use the onstat -k command to print information
  about active locks, including the address of the lock in the lock
  table.

• onstat -l command: Print physical and logical log information
  Use the onstat -l command to display
  information about the physical logs, logical logs, and temporary logical
  logs.

• onstat -L command: Print the number of free locks
  Use the onstat -L command to print the
  number of free locks on a lock-free list.

• onstat -m command: Print recent system message log information
  Use the onstat -m command to display
  the 20 most recent lines of the system message log.

• onstat -o command: Output shared memory contents to a file
  Use the onstat -o command to write the
  contents of shared memory to a specified file for later analysis.
  If you do not specify an output file, a file named onstat.out is
  created in the current directory.

• onstat -p command: Print profile counts
  Use the onstat -p command to display
  information about profile counts either since you started the database
  server or since you ran the onstat -z  command.

• onstat -P command: Print partition information
  Use the onstat -P command to display
  the partition number and the pages in the buffer pool for all of the
  partitions.

• onstat -r command: Repeatedly print selected statistics
  Use the onstat -r command to repeatedly
  print the statistics for other options specified in the command at
  specified intervals.

• onstat -R command: Print LRU, FLRU, and MLRU queue information
  Use the onstat -R command to display
  detailed information about the LRU queues, FLRU queues, and MLRU queues.
  For each queue, the onstat -R command displays
  the number of buffers in the queue and the number and percentage of
  buffers that have been modified.

• onstat -s command: Print latch information
  Use the onstat -s command to display
  general latch information, including the resource that the latch controls.

• onstat -t and onstat -T commands: Print tblspace information
  Use the onstat -t command
  to display tblspace information for active tblspaces. Use the onstat
  -T command to display tblspace information for all tblspaces.

• onstat -u command: Print user activity profile
  Use the onstat -u command to display
  a profile of user activity.

• onstat -x command: Print database server transaction information
  Use the onstat -x command to display
  transaction information on the database server.

• onstat -X command: Print thread information
  Use the onstat -X command to obtain
  precise information about the threads that are waiting for buffers.

• onstat -z command: Clear statistics
  Use the onstat -z command
  to clear database server statistics, including statistics that relate
  to Enterprise Replication, and set the profile counts to 0.

• Return codes on exiting the onstat utility
  The onstat utility displays a set of
  return codes when you exit the utility.