vxfsstat(1M) vxfsstat(1M)
NAME [Toc] [Back]
vxfsstat - display VxFS file system statistics
SYNOPSIS [Toc] [Back]
vxfsstat [-aCgsvxz] [-e columns] [-c sample_count]
[-t seconds] mount_point
vxfsstat [-abi] [-c sample_count] [-t seconds] mount_point
vxfsstat [-w outfile] [-c sample_count] [-t seconds] mount_point
vxfsstat -r infile [-aCgsvxz] [-e columns]
DESCRIPTION [Toc] [Back]
vxfsstat is a statistical reporter to aid in performance tuning and
determining performance anomalies. vxfsstat gathers buffer cache,
inode cache, DNLC (directory name lookup cache), per-CPU statistics,
per-file system statistics for local and cluster mounted file system,
and global cluster file system counters.
The mount_point specifies any VxFS file system mount point.
mount_point is used as an ioctl entry point to access the statistics
maintained by the VxFS kernel.
Options [Toc] [Back]
vxfsstat recognizes the following options:
-a Displays absolute values.
-b Displays buffer cache statistics.
-c sample_count
Specifies the number of samples to take.
-C Displays per-CPU statistics.
-e columns Selects the number of column entries to display per line
of output. The default is two columns. -e does not
affect all output formats.
-g Displays cluster file system global statistics. Not
valid on non-cluster (local) mounted file systems.
-i Displays inode cache and DNLC statistics. -i is the
default output format.
-r infile Replays output from the specified file infile. You can
create output files using the -w option.
-s Displays per-file system statistics for cluster file
systems. Not valid on non-cluster (local) mounted file
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vxfsstat(1M) vxfsstat(1M)
systems.
-t seconds Specifies the duration of the sampling interval in
seconds.
-v Displays VxFS shared counters and statistics.
-w outfile Appends output to the specified file outfile. vxfsstat
can be invoked multiple times with the same file to
collect multiple samples. The -w option can only be used
with the -c, and -t options.
-x Displays per-file system VxFS statistics.
-z Displays only non-zero values.
Operands [Toc] [Back]
vxfsstat recognizes the following operand:
mount_point Name of any VxFS file system mount point. mount_point is
used as an ioctl entry point to access the statistics
maintained by the VxFS kernel.
Notes [Toc] [Back]
The vxfsstat command was introduced to provide a diagnostic and tuning
tool for knowledgeable VxFS file system users. The command is still
under development and may undergo significant additions and changes.
There is a strong possibility that functionality introduced and
modified in future versions will not be completely backward
compatible. Take this into account when you begin using this command
and incorporating it into scripts.
EXAMPLES [Toc] [Back]
The following examples show the output of vxfsstat using various
options.
To display buffer cache statistics:
vxfsstat -b -c 5 /mount_point
0:43:44.091 Mon Apr 15 2002 -- absolute sample
buffer cache statistics
36992 Kbyte current 377456 maximum
688187425 lookups 99.98% hit rate
37165 sec reuse age [not limited by maximum]
10:43:54.121 Mon Apr 15 2002 -- delta (10.029 sec sample)
buffer cache statistics
36992 Kbyte current 377456 maximum
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vxfsstat(1M) vxfsstat(1M)
29793 lookups 99.10% hit rate
37175 sec reuse age [not limited by maximum]
10:44:04.131 Mon Apr 15 2002 -- delta (10.010 sec sample)
buffer cache statistics
36992 Kbyte current 377456 maximum
29199 lookups 99.15% hit rate
37185 sec reuse age [not limited by maximum]
To display shared counters and statistics kept by VxFS:
vxfsstat -v /mount_point
10:49:10.791 Mon Apr 15 2002 -- absolute sample
vxi_alloc_emap 127699050 vxi_alloc_expand_retry 891125
vxi_alloc_find_retry 153857 vxi_alloc_findfail 225394263
vxi_alloc_findfix 889319 vxi_alloc_mapflush 2
vxi_alloc_prev 14581575 vxi_alloc_search 59147260
vxi_alloc_smap 0 vxi_alloc_sumclean 0
.
.
.
vxi_cbuf_cache_hit 0 vxi_cbuf_cache_miss 0
vxi_cgetblk_pbhit 0 vxi_cgetblk_pbmiss 0
vxi_cbuf_initlock 0 vxi_send_vrtinit 0
vxi_send_vrtmnt 0 vxi_send_vrtunmnt 0
vxi_send_vrtremnt 0
To display the inode cache and DNLC statistics:
vxfsstat -i /mount_point
10:52:54.051 Mon Apr 15 2002 -- absolute sample
Lookup & DNLC Statistics
174944 maximum entries in dnlc
22798260 total lookups 88.02% fast lookup
24065082 total dnlc lookup 83.39% dnlc hit rate
2649796 total enters 7.57 hit per enter
inode cache statistics
127577 inodes current 127577 peak 174931
maximum
3764456 lookups 43.72% hit rate
127757 inodes alloced
921 sec recycle age [not limited by maximum]
4294967295 sec free age
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vxfsstat(1M) vxfsstat(1M)
To display all shared counters that are non-zero:
vxfsstat -vz /mount_point
10:53:56.471 Mon Apr 15 2002 -- absolute sample
vxi_alloc_emap 127970901 vxi_alloc_expand_retry 891135
vxi_alloc_find_retry 153918 vxi_alloc_findfail 25474427
vxi_alloc_findfix 889319 vxi_alloc_mapflush 2
vxi_alloc_prev 14598090 vxi_alloc_search 59282134
vxi_alloc_sumsum 31483425 vxi_alloc_try 73892402
.
.
.
vxi_write_dio 4030035 vxi_write_donetran 645551
vxi_write_logged 5708641 vxi_write_only 75826
vxi_write_rand 145197162 vxi_write_seq 9729784
vxi_clone_create 73 vxi_clone_remove 120
vxi_clone_convnodata 33 vxi_clone_dispose 32
To save two samples of the per-file system counters taken at 10-second
intervals to a file named statfile, then display only the non-zero
values, one per line:
vxfsstat -w /tmp/statfile -t 10 -c 2 /mount_point
vxfsstat -vz -e 1 -r /tmp/statfile
11:01:42.481 Mon Apr 15 2002 -- absolute sample
vxi_bawrite 4
vxi_bcache_curkbyte 128
vxi_bcache_maxkbyte 37898
vxi_bcache_recycleage 3569
vxi_bc_hits 41
vxi_bc_lookups 74
vxi_bc_reuse 29
vxi_bc_waits 2
vxi_bdwrite 3
vxi_bmap 438
vxi_bmap_cache 407
vxi_bread 29
vxi_brelse 5
vxi_bwrite 3
vxi_dnlc_size 19940
vxi_eau_unexpand 1
vxi_iaccess 9
vxi_icache_allocedino 27
vxi_icache_curino 27
vxi_icache_inuseino 27
vxi_icache_maxino 19937
vxi_icache_peakino 27
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vxfsstat(1M) vxfsstat(1M)
vxi_ifree_timelag 600
vxi_iget 28
vxi_iget_loop 55
vxi_inopage 1
vxi_log 1
vxi_log_blks 6
vxi_log_flush 1
vxi_log_idle 1
vxi_log_write 3
vxi_lread 57
vxi_lwrite 6
vxi_physmem_mbyte 511
vxi_superwrite 3
vxi_tran_commit 1
vxi_tran_low 1
vxi_tran_space 5
vxi_tran_subfuncs 2
vxi_tranlogflush 2
04:09:48.804 Sun Apr 14 2002 -- delta (10.010 sec sample)
vxi_bcache_curkbyte 128
vxi_bcache_maxkbyte 37898
vxi_bcache_recycleage 3569
vxi_dnlc_size 19940
vxi_icache_curino 27
vxi_icache_maxino 19937
vxi_icache_peakino 27
vxi_ifree_timelag 600
SEE ALSO [Toc] [Back]
iostat(1), vmstat(1), sar(1M).
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