ufs:ufs_WRITES

Description

If ufs_WRITES is non-zero, the number of bytes outstanding for writes on a file is checked. See ufs_HW subsequently to determine whether the write should be issued or should be deferred until only ufs_LW bytes are outstanding. The total number of bytes outstanding is tracked on a per-file basis so that if the limit is passed for one file, it won't affect writes to other files.

Data Type

Signed integer

Default

1 (enabled)

Range

0 (disabled), 1 (enabled)

Units

Toggle (on/off)

Dynamic?

Yes

Validation

None

When to Change

When you want UFS write throttling turned off entirely. If sufficient I/O capacity does not exist, disabling this parameter can result in long service queues for disks.

Commitment Level

Unstable