Tunable Kernel Parameters

Table Of Contents
File System Subsystem
File System Parameter Summary
Chapter 4
26
SCSI Devices Parameter Summary
Control SCSI device access.
Asynchronous Writes Parameter Summary
Control asynchronous writes to file system.
File System:
Read
vxfs_max_ra_kbytes Maximum amount of read-ahead data, in KB, that the
kernel may have outstanding for a single VxFS file
system. Manpage: vxfs_max_ra_kbytes (5).
File System:
Read
vxfs_ra_per_disk Maximum amount of VxFS file system read-ahead per
disk, in KB. Manpage: vxfs_ra_per_disk (5).
File System:
SCSI
scsi_maxphys Maximum record size for the SCSI I/O subsystem, in
bytes. Manpage: scsi_maxphys (5).
File System:
SCSI
scsi_max_qdepth Maximum number of SCSI commands queued up for SCSI
devices. Manpage: scsi_max_qdepth (5).
File System:
SCSI
st_ats_enabled Flag whether to reserve a tape device on open. Manpage:
st_ats_enabled (5).
File System:
SCSI
st_fail_overruns SCSI tape read resulting in data overrun causes failure.
Manpage: st_fail_overruns (5).
File System:
SCSI
st_large_recs Enable large record support for SCSI tape. Manpage:
st_large_recs (5).
File System:
Write
fs_async Enable/disable asynchronous writes of file system data
structures to disk. Manpage: fs_async (5).