PRIMECLUSTER Global File Services Configuration and Administration Guide 4.2 (Solaris(TM) Operating Environment)

9.2.1 Statistical information of file system

The commands for checking a GFS Local File System include a GFS Local File System-specific command, sfxstat(1M), as well as the standard Solaris OE commands, iostat(1M), vmstat(1M), and sar(1M). These commands enable the user to determine the status of system activity and troubleshoot performance problems.

This section describes the use of the sfxstat(1M) command and the information displayed by the command. The method of tuning performance by setting the values of the items is explained in the next section.

Format: sfxstat [ -abcdfilmA ] [ interval [ count ] ] [ mount_point ... ]

After reporting statistical information accumulated since the file system was mounted, the sfxstat(1M) command reports differences from previous information at specified intervals.

If interval is specified, this command reports statistical information at intervals of interval seconds. If count is specified, this command repeats the report of statistical information for the number of times indicated by count.

If mount_point is specified, this command reports on only the specified file system. Otherwise, this command reports information on all GFS Local File Systems currently mounted.

The meanings of the optional parameters are listed below. Note that all information is reported if the options are omitted:

- a

Reports information on assigned extent manipulation.

The retrieval request count, acquisition count, number of acquired blocks, unsuccessful acquisition count, release count, number of released blocks, released block successful connection count, free extent management division occurrence count, and free extent management link occurrence count are reported.

- b

Reports the meta-data management buf acquisition count, dynamic buf acquisition count, and sleep count during a request to acquire buf.

- c

Reports the access count for the meta-data cache, cache hit count, update count, read count for each meta-data type, write count, write time, and average time of write processing.

- d

Reports information on direct I/O.

The direct I/O read count, write count, number of blocks read, number of blocks written, normal I/O read count, normal I/O write count, page flash count after read, and page flash count after write are reported.

- f

Reports information on free extent manipulation.

The retrieval request count, acquisition count, number of acquired blocks, unsuccessful acquisition count, release count, number of released blocks, released block successful connection count, free extent management division occurrence count, and free extent management link occurrence count are reported.

- i

Reports the actual data area read I/O count, actual write I/O count, number of actual I/O blocks read, and number of actual I/O blocks written.

- l

Reports information on the log daemon.

The log daemon start count, sync request count, fsync request count, log buffer full count, request count from meta-data write daemon, sleep count for excessive transactions, sleep count for excessively large preceding transaction, log daemon I/O issue count, write time, number of write blocks, number of valid blocks, log-oriented processing request count, log-oriented processing parallel operation count, average parallel operation count, large buffer use count, and subtransaction occurrence count are reported.

- m

Reports information on the meta-data daemon.

The meta-data daemon start count, I/O wait buf count for meta-data daemon , disk full-driven start count, and meta-data cache full-driven start count are reported.

- A

Reports all information.

Some of the information displayed by the sar(1) command does not contain the status of GFS Local File System activity. The following items are not included:

• Cache hit rates (bread, bwrit, lread, lwrit, rcache, wcache)
• UFS-specific information (iget, dirblk, ufs_ipf)