gstat(8)

NAME

gstat – print statistics about GEOM disks

SYNOPSIS

gstat [-abBcCdops] [-f filter] [-I interval]

DESCRIPTION

The gstat utility can be used to monitor I/O transactions of geom(4) devices.

The options are as follows:

-a

Only display providers that are at least 0.1% busy.

-b

Batch mode. Collect numbers, print and exit. Default if stdout is not a tty.

-B

Endless batch mode. Same as batch mode, but does not exit after collecting the first set of data.

-c

Enable display of geom(4) consumers too. The default is to show statistics only for geom(4) producers.

-C

CSV output mode. Implies endless batch mode, but output is in the form of comma-separated values, with ISO 8601-like timestamps.

-d

Enable display of statistics for delete (BIO_DELETE) operations.

-f filter

A regular expression that can be used to only show statistics for some devices. Only devices with the names matching filter will be displayed. The format of the regular expression is described in re_format(7).

-g

Show Gigabytes

-k

Show kilobytes

-m

Show Megabytes

-I interval

Refresh the gstat display every interval microseconds. Adding a suffix of s, ms, or us (the default) indicates that the update interval is specified in seconds, milliseconds, or microseconds, respectively.

-o

Enable display of statistics for other operations (BIO_FLUSH).

-p

Only display physical providers (those with rank of 1).

-s

Enable average block size.

INTERACTIVE COMMANDS

These commands are currently recognized if gstat is not running in batch mode:

<

Halve the update interval.

>

Double the update interval.

1

Set update interval to one second

c

Toggle display of geom(4) consumers.

d

Toggle display BIO_DELETE

f

Display only devices with the names matching regular expression filter (prompt for filter).

F

Remove device filter.

g

Show gigabytes.

k

Show kilobytes.

m

Show megabytes.

o

Toggle display other (BIO_FLUSH) operations.

p

Toggle display other only primary providers.

q

Quit

s

Toggle average block size. gstat.

EXIT STATUS

The gstat utility exits 0 on success, and >0 if an error occurs.

EXAMPLES

To filter the output to only physical disks named ada0 through ada4:

# gstat -f ada[0-4]$

SEE ALSO

systat(1), geom(4), iostat(8), vmstat(8)

HISTORY

A gstat utility appeared in FreeBSD 5.0.