physical_io_buffers(5) File Formats Manual physical_io_buffers(5)NAME
physical_io_buffers - total buffers for physical I/O operations
DESCRIPTION
This tunable was used in HP-UX 11i Versions 1.6 and 2.0 to size a shared pool of buffers for physical I/O operations in the kernel.
As of HP-UX 11i Version 3.0 and later, the kernel automatically manages the pool size. This tunable is no longer needed and is obsolete as
of HP-UX 11i Version 3.0.
WARNINGS
All HP-UX kernel tunable parameters are release specific.
Installation of optional kernel software, from HP or other vendors, may cause changes to tunable parameter values. After installation,
some tunable parameters may no longer be at the default or recommended values. For information about the effects of installation on tun-
able values, consult the documentation for the kernel software being installed. For information about optional kernel software that was
factory installed on your system, see at
AUTHOR
was developed by HP.
OBSOLETE Tunable Kernel Parameters physical_io_buffers(5)
Check Out this Related Man Page
pfdat_hash_locks(5) OBSOLETE pfdat_hash_locks(5)NAME
pfdat_hash_locks - OBSOLETE kernel tunable parameter
DESCRIPTION
The tunable is obsolete and has been removed. HP-UX will automatically calculate the value based on the system configuration.
Global kernel structures containing information on a running process or memory usage are frequently accessed or modified by several threads
concurrently. To prevent race conditions, these structures are protected by spinlocks (kernel data used for synchronization) which allow
only the spinlock "holder" to proceed, while all others attempting to access the structure must wait.
Hashed spinlocks are used when each instance of such a data structure is to be protected, and there are several instances. Using a single
spinlock for all instances would cause too much contention, but using one spinlock per structure wastes memory while the majority of the
locks are unused at any given time.
By allocating a pool of hashed locks, a hash function picks one lock per group of structures, reducing contention while conserving memory.
The system-calculated value of sets the size of such a pool for the pfdat data structure spinlocks.
WARNINGS
All HP-UX kernel tunable parameters are release specific. This parameter may be removed or have its meaning changed in future releases of
HP-UX.
Installation of optional kernel software, from HP or other vendors, may cause changes to tunable parameter values. After installation,
some tunable parameters may no longer be at the default or recommended values. For information about the effects of installation on tun-
able values, consult the documentation for the kernel software being installed. For information about optional kernel software that was
factory installed on your system, see at
AUTHOR
was developed by HP.
Tunable Kernel Parameters pfdat_hash_locks(5)
Introduction
I have seen some misinformation regarding Unix file permissions. I will try to set the record straight. Take a look at this example of some output from ls:
$ ls -ld /usr/bin /usr/bin/cat
drwxrwxr-x 3 root bin 8704 Sep 23 2004 /usr/bin
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Hi everyone,
I know the following questions are noobish questions but I am asking them because I am confused about the basics of history behind UNIX and LINUX.
Ok onto business, my questions are-:
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Hello guys,
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SOH
bla bla bla
bla bla bla
ETX SOH
bla bla bla
ETX
SOH
bla bla bla
ETX
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Hi,
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>GL3482.1
GAACTTGAGATCCGGGGA
GCAGTGGATCTCCACCAG
CGGCCAGAACTGGTGCAC
CTCCAGGCCAGCCTCGTC
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I require Hpux 11iv3 administration document if anyone could assist with the same it would be a great help. The Hp site does not have any consolidated document that could be referred to. I require something in line that could assist with network configuration and more. I require the same for Build... (3 Replies)
Got a raise and a formal position of 'unix system engineer' in 2016.
I would like to thank you members and admins.
This would not be possible without you.
I will mention some..
Thank you Don, for making me learn and understand the importance of standards, which i try to apply as much as i... (3 Replies)
Greetings Experts,
As part of automating the sql generation, I have the source table name, target table name, join condition stored in a file join_conditions.txt which is a delimited file (I can edit the file if for any reason). The reason I needed to store is I have built SELECT list without... (5 Replies)
Hi ,
I have to use HP-unix OS to get difference between 2 files.while i tried a piece of code in other OS(linux/unix) as below, it worked fine & the output is desired one.
diff --suppress-common-lines -y file_1 file_2 >d.txt
The same doesn't works in HP -unix. Any help shall be... (6 Replies)
hi folks,
how to using tar with exclude directory and compress it using tar.Z
i only know how to exclude dir only with this command below:
tar -cvf /varios/restore/test.tar -X excludefile.txt /jfma/test1/
how to compress it using 1 command?
Thanx
Please use CODE tags as... (6 Replies)
Back in my early days, just starting at my first job where I was doing 100% UNIX...
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Hello!
Yesterday we added over 10,000 PHP man pages to our man page section.
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# When the shell exits, append to the history file instead of overwriting it
shopt -s histappend (3 Replies)