vxdmptune, vxvoltune - display and change values of VxVM and DMP tunable parameters
vxdmptune [-H] [dmp_parameter]vxdmptune [-H] dmp_parameter value
vxvoltune [-H] [vxvm_parameter]
vxvoltune [-H] vxvm_parameter value
The vxvoltune and vxdmptune utilities can be used to display and change the values of Veritas Volume Manager (VxVM) and Dynamic Multipathing (DMP) tunable parameters. If no arguments are specified, the commands display the currently defined values of all tunables that have values specified in the configuration file. If the name of a tunable parameter is specified, only its value is displayed. If a value is specified as an additional argument, this is used to update the setting in the configuration file. Any changes to this file are not applied until the system is shut down and rebooted. The changes are persistent across reboots of the system.
-H Displays detailed help on the usage of the command.
Display the current value of the vol_maxkiocount VxVM parameter:vxvoltune vol_maxkiocount
Set the value of vol_maxkiocount to 8192:
vxvoltune vol_maxkiocount 8192
/etc/vx/vxdmp_tunables Configuration file for DMP tunables. /etc/vx/vxvm_tunables Configuration file for VxVM tunables.
The following tunables may be set using vxdmptune:
dmp_enable_restore_daemon
dmp_failed_io_threshold
dmp_pathshitch_blks_shift
dmp_restore_daemon_cycles
dmp_restore_daemon_interval
dmp_restore_daemon_policy
dmp_retry_count
The following tunables may be set using vxvoltune:
maxiosize
vol_checkpt_default vol_default_iodelay vol_fmr_logsz vol_max_nmpool_sz vol_max_rdback_sz vol_max_wrspool_sz vol_max_volumes vol_maxioctl vol_maxkiocount vol_maxparallelio vol_min_lowmem_sz vol_rvio_maxpool_sz volcvm_smartsync voldrl_max_drtregs voldrl_max_seq_dirty voldrl_min_regionsz voliomem_chunk_size voliomem_maxpool_sz voliot_errbuf_dflt voliot_iobuf_default voliot_iobuf_limit voliot_iobuf_max voliot_max_open volpagemod_max_memsz volraid_minpool_size | |
vxintro(1M)See the Veritas Volume Manager Administrators Guide and Veritas Volume Replicator Administrators Guide for a description of these tunables.
VxVM 6.0.1 | vxvoltune (1M) |