Difference between revisions of "Windows kstat"
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'''kstat''' is the utility used on illumos to query the kernel for various statistics and detailed information. | '''kstat''' is the utility used on illumos to query the kernel for various statistics and detailed information. | ||
| − | It performs more | + | It performs more or less the same responsibly as ''/proc/'' on Linux. |
Simply run the command to dump everything: | Simply run the command to dump everything: | ||
| Line 11: | Line 11: | ||
You can also use it to set certain tunables in the kernel, for example: | You can also use it to set certain tunables in the kernel, for example: | ||
| + | |||
| + | <hr> | ||
| + | |||
| + | ** kstat.exe ** is no longer the recommended way to change tunables. All tunables | ||
| + | are now written to the Registry, and are updated dynamically when changed. | ||
| + | |||
| + | The following information is no longer relevant! | ||
| + | |||
| + | <hr> | ||
| + | |||
=== Arc Max === | === Arc Max === | ||
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kstat.exe -w zfs:0:tunable:hw_hostid=11223344 | kstat.exe -w zfs:0:tunable:hw_hostid=11223344 | ||
| + | |||
| + | === ZFSin debug === | ||
| + | |||
| + | You can also ask the kernel to save the debug print buffer to disk. | ||
| + | |||
| + | kstat.exe -w zfs:0:tunable:vnop_debug=1337 | ||
| + | |||
| + | Will write the buffer to '''C:/Windows/debug/ZFSin.txt''' - if the directory exists. | ||
| + | |||
| + | See [[Windows_BSOD#Debug_Print_Buffer|Debug]] for more information on the debug buffer. | ||
Latest revision as of 16:50, 5 May 2024
Windows kstat[edit]
kstat is the utility used on illumos to query the kernel for various statistics and detailed information. It performs more or less the same responsibly as /proc/ on Linux.
Simply run the command to dump everything:
kstat.exe (output is large)
You can also use it to set certain tunables in the kernel, for example:
** kstat.exe ** is no longer the recommended way to change tunables. All tunables are now written to the Registry, and are updated dynamically when changed. The following information is no longer relevant!
Arc Max[edit]
It is now recommended that you use the Registry to set the ZFS tunables.
To set max ARC size to 512 MiB: kstat.exe -w zfs:0:tunable:zfs_arc_max=536870912
Dump the "zfs:0:tunable" sub-section to list the available knobs to fiddle with.
A setting is not retained over reboot, and will need to be set each boot. (In the future, there will be something to handle this automatically)
HostID[edit]
The HostID on Windows is generated from the Software/Microsoft/Cryptography/MachineGuid and generally most users do not need to change it. However, should you want to set the HostID that ZFS uses, you can do so by running;
kstat.exe -w zfs:0:tunable:hw_hostid=11223344
ZFSin debug[edit]
You can also ask the kernel to save the debug print buffer to disk.
kstat.exe -w zfs:0:tunable:vnop_debug=1337
Will write the buffer to C:/Windows/debug/ZFSin.txt - if the directory exists.
See Debug for more information on the debug buffer.
