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| Using vxtunefs to obtain tuning information | ||
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| Prev | Enabling Cached Quick I/O on a file system | Next |
Check the setting of the qio_cache_enable flag for each file system using the vxtunefs command.
To obtain information on only the qio_cache_enable flag setting
Use the grep command with vxtunefs:
# /opt/VRTS/bin/vxtunefs /mount_point | grep qio_cache_enable
# /opt/VRTS/bin/vxtunefs /db01 | grep qio_cache_enable
where /db01 is the name of the file system. This command displays only the qio_cache_enable setting as follows:
qio_cache_enable = 0
You can also use the vxtunefs command to obtain a more complete list of I/O characteristics and tuning statistics.
# /opt/VRTS/bin/vxtunefs /db01
The vxtunefs command displays output similar to the following:
Filesystem i/o parameters for /db01
read_pref_io = 65536
read_nstream = 1
read_unit_io = 65536
write_pref_io = 65536
write_nstream = 1
write_unit_io = 65536
pref_strength = 10
buf_breakup_size = 1048576
discovered_direct_iosz = 262144
max_direct_iosz = 1048576
default_indir_size = 8192
qio_cache_enable = 1
write_throttle = 0
max_diskq = 1048576
initial_extent_size = 8
max_seqio_extent_size = 2048
max_buf_data_size = 8192
hsm_write_prealloc = 0
read_ahead = 1
inode_aging_size = 0
inode_aging_count = 0
fcl_maxalloc = 130150400
fcl_keeptime = 0
fcl_winterval = 3600
The vxtunefs(1) manual pages contain a complete description of vxtunefs parameters and the tuning instructions.