Tunable Kernel Parameters
Table Of Contents
- Tunable Kernel Parameters
- Legal Notices
- Revision History
- Conventions
- 1 Overview
- 2 Accounting Subsystem
- 3 Asynchronous I/O Subsystem
- 4 File System Subsystem
- 5 Interprocess Communication (IPC) Subsystem
- 6 Kernel Crash Dump Subsystem
- 7 Memory Paging Subsystem
- 8 Process Management Subsystem
- 9 Spinlock Pool
- 10 Streams Subsystem
- 11 Miscellaneous Parameters
- Miscellaneous Parameter Summary
- CD-ROM Parameter Summary
- System Clock Parameter Summary
- Disk I/O Parameter Summary
- Intrusion Detection System/9000
- Fast Symbolic Link Traversal Parameter Summary
- Reserved System Memory Parameter Summary
- Network Parameter Summary
- Queued Signals Parameter Summary
- Real-Time Priority Parameter Summary
- Terminal Parameter Summary
- Maximum Users Parameter Summary
- Web Server Parameter Summary
- Miscellaneous Parameter Summary
- A Table of Tunable Kernel Parameters

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).