I have checked other servers having the same OS,hardware and almost having same workload.Their buffer cache values are as below. Their utilizations are < 40%. So I hope this buffer cache may be the culprit for displaying high utilization.
Thanks for everyone for your help in this. I cant say this was closed but hope that this may help to close this problem. Let's see what happens if these values are changed.
Hi am facing high cpu utilization on my sybase server.
I have P550
Number Of Processors: 4
Processor Clock Speed: 1656 MHz
CPU Type: 64-bit
Kernel Type: 32-bit
LPAR Info: 1 65-D837E
Memory Size: 7840 MB
in topas it shows
Name PID CPU% PgSp Owner
dataserv 565264 ... (1 Reply)
Hi Unix Gurus i am somewhat new to unix scripting so need your help to
create a script as below.
# This script would find the process consuming memory beyond a certain #limit. if the meemory consumption is more than 100% for a period of 1
# minute for the specific process. the script would... (0 Replies)
Hi,
i have two oracle instances running on my server with 7.5G RAM but it is showing almost 99% memory is full as you can see bellow.
# svmon
size inuse free pin virtual
memory 1974272 1954270 20002 336595 1800652
pg space 4194304 ... (7 Replies)
How to find the memory utilization of AIX server using svmon -G output.
Sample output for svmon -G command from my AIX test server,
size inuse free pin virtual
memory 4014080 3995443 18637 575916 1876393
pg space 1179648 ... (3 Replies)
Hello All,
We have a jave server running on both linux and Solaris environments.
On solaris,it consumes only 600-700MB whereas it goes upto 21G in Linux.
I am monitoring the memory consumption through top command.
Is this high memory consumption expected in Linux? (1 Reply)
Hi Experts,
Our servers running Solaris 10 with SAP Application. The memory utilization always >90%, but the process on SAP is too less even nothing.
Why memory utilization on solaris always looks high?
I have statement about memory on solaris, is this true:
Memory in solaris is used for... (4 Replies)
Hello Guys,
I have one Solaris server with high memory utilization >90%. As per checking, below is the output for memory usage.
bash-3.00# ps -efo pmem,uid,pid,ppid,pcpu,comm | sort -r
%MEM UID PID PPID %CPU COMMAND
1.7 29496 20668 1 0.0 /opt/app/iw-home/tools/java/bin/java
1.5... (1 Reply)
Hi All,
I have a java process which is showing high virtual memory utilization in client server. But the same process is showing comparitively lesser virtual memory consumption. I understand that virtual memory shown is not of much importance for the general user in normal condition, my client... (2 Replies)
Hi,
i am new to linux/RHEL 6.0 and i have two questions.
1) How to get the CPU utilization and Memory Utilization of all Services running currently?
2) How to get the CPU utilization and Memory Utilization of all Applications running currently?
Please help me to find the script.
... (2 Replies)
Hi Fellas,
Not sure how I can dig in even further but we notice that one of our DB servers is showing high Sys% CPU usage even though when I execute the following command :
I can see that postgres is the only one using the CPU. So if anyone can advise me what would be the best way to... (3 Replies)
Discussion started by: arizah
3 Replies
LEARN ABOUT HPUX
fcache_seqlimit_file
fcache_seqlimit_file(5) File Formats Manual fcache_seqlimit_file(5)NAME
fcache_seqlimit_file - percent of file cache that can be consumed by sequential accesses, per-file limit
VALUES
Failsafe
Default
Allowed values
The minimum value allowed is The maximum value allowed is
Specify a positive integer value.
DESCRIPTION
This parameter places a per-file limit on how much memory can be consumed in the file cache by sequential accesses. It is important to
note the relationship between this tunable and the system-wide limit tunable, These two tunables, in conjunction, control how much memory
in the file cache can be consumed by sequential accesses.
When sequential accesses to a file has exceeded the per-file limit AND the system-wide limit, the excess file cache pages are paged out.
Note that both limits have to be reached in order for page stealing to occur. For example, a file can exceed its limit if the limit has
not been reached. Similarly, no page stealing occurs if none of the files on the system has exceeded the per-file limit, even if the sys-
tem-wide limit has been hit. The page stealing feature is specific to improving sequential I/O performance for large files.
Limiting the file cache memory consumption helps alleviate memory pressure in the file cache. It also prevents cache wiping -- a single
thread sequentially accessing a large file can wipe out the existing contents of the file cache.
Who is Expected to Change This Tunable?
System administrators that run applications which do large sequential file I/O's. Typically, these files are larger than the size of phys-
ical memory on the system.
Restrictions on Changing
Changes to this tunable take effect immediately.
When Should the Value of This Tunable Be Raised?
When you wish to allow greater file cache consumption due to sequential accesses. Setting and to 100 effectively disables the sequential
access page stealing feature.
What Are the Side Effects of Raising the Value?
Setting the tunable too high may yield poor performance for large sequential I/O's for large files (larger than physical memory size). and
should be tuned appropriately for the anticipated workload.
When Should the Value of This Tunable Be Lowered?
When you wish to limit file cache consumption due to sequential accesses. Setting and to 0 forces sequential access page stealing to
always occur.
What Are the Side Effects of Lowering the Value?
Could cause more pageouts to occur in an attempt to limit the file cache consumption.
What Other Tunable Values Should Be Changed at the Same Time?
and should be changed at the same time.
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.
SEE ALSO fcache_seqlimit_system(5).
Tunable Kernel Parameters fcache_seqlimit_file(5)