I've come across some oracle servers were I/O was a problem causing CPU problems.
I would high suggest as well to setup nmon reports and monitor these for a day or two, to really give you an idea of what your system is really doing. the 1.3 seems odd, and defiantly uncapped is best if allowed, but keep in mind as well if there is some config problem going on uncapping the server is going to be a pain for your other lpars.
First i'd adjust the CPU to maybe 1.6 or personally i would go for a min of 2 on a oracle server.
Ensure nmon is installed on your server and add this line to the crontab:
I'd set this up and review it for I/O, CPU, Mem and ensure everything is working correctly first before uncapping.
ps. I'm sure your aware but be sure not to send the nmon file as that contains sensitive data.
Hi, new here and need some help. Sometimes my site is extremely slow, if when there aren't too many people on, whereas when there are over 300 online members the site may be very fast. We use CentOS, PHP 5.26. The server has 4GB and Plesk usually shows about 2 or 3 GB free.
I believe I can see... (4 Replies)
I am running a Dell PE R815 with 4 x AMD 12 core CPUs with 128GB of RAM and a RAID 5 array of 6 SAS disks. This is an HPC application and is definitely CPU bound, however once I run 16 of these processes (thus pinning 16 cores) the work performed slows down dramatically, to maybe 5 or 10% of what... (2 Replies)
Hi Guys,
I need to write a script capable of identifying when a high cpu utilitzation process. It sounds simple but we are on a AIX 5.3 environment with Virtual CPU's (VP's) and logical CPU's. Please any ideas or tips would be highly appreciated. Thanks.
Harby. (6 Replies)
Hi All,
Yesterday my Linux server went panic and even a small command took a lot of time to run.
When i monitored pl find the below output
Cpu(s): 0.1%us, 98.4%sy, 0.0%ni, 1.5%id, 0.0%wa, 0.0%hi, 0.0%si, 0.0%st
the time spent on kernel mode is 98 % and also idle time is around 1.5 %...... (4 Replies)
Hi,
I can't seem to make sense of this. My wait time is showing really high but vmstat's and topas are showing normal usage.
ps aux
USER PID %CPU %MEM SZ RSS TTY STAT STIME TIME COMMAND
root 9961810 5680.7 0.0 448 384 - A Dec 16 6703072:12 wait
... (2 Replies)
I have created one script and i have added it into cron to run after 10 mins. However I have noted that whenever that script runs, It causes CPU utilization of server to increase about 10-20 %
I have rechecked script and there is no way i can make changes, Script contain only 2-3 commands. So... (4 Replies)
HI
In my M5000 , one of domain is having SAp installed. from today onwards we are facing some stange issue.
when we start SAP application, that particular user is taking 95 % of system CP and renaming 5 % is taken by system . because of this reason application is slow.
i have 4 CPU(32... (4 Replies)
Hello.
In an informix context, on AIX 5.3 TL 12, we encounter this problem :
Sometimes in the day (probably when users exits from their session), a child process lose its parent (PPID is now "1") and this child is consumming lot of CPU "USER".
I tried, on different cases, "truss -p... (4 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 OSX
dapptrace
dapptrace(1m) USER COMMANDS dapptrace(1m)NAME
dapptrace - trace user and library function usage. Uses DTrace.
SYNOPSIS
dapptrace [-acdeFlhoU] [-u lib] { -p PID | command }
DESCRIPTION
dapptrace prints details on user and library function calls. By default it traces user functions only, options can be used to trace library
activity.
Of particular interest is the elapsed times and on cpu times, which can identify both function calls that are slow to complete, and those
which are consuming CPU cycles.
Since this uses DTrace, only users with root privileges can run this command.
OPTIONS -a print all details
-b bufsize
dynamic variable buffer size. Increase this if you notice dynamic variable drop errors. The default is "4m" for 4 megabytes per CPU.
-c print function call counts
-d print relative timestamps, us
-e print elapsed times, us
-F print flow indentation
-l force printing of pid/lwpid per line
-o print on-cpu times, us
-p PID examine this PID
-u lib trace this library instead
-U trace all library and user functions
EXAMPLES
run and examine the "df -h" command,
# dapptrace df -h
examine PID 1871,
# dapptrace -p 1871
print using flow indents,
# dapptrace -Fp 1871
print elapsed and CPU times,
# dapptrace -eop 1871
FIELDS
PID/LWPID
Process ID / Lightweight Process ID
RELATIVE
relative timestamps to the start of the thread, us (microseconds)
ELAPSD elapsed time for this system call, us
CPU on-cpu time for this system call, us
CALL(args)
function call name, with some arguments in hexadecimal
DOCUMENTATION
See the DTraceToolkit for further documentation under the Docs directory. The DTraceToolkit docs may include full worked examples with ver-
bose descriptions explaining the output.
EXIT
dapptrace will run forever until Ctrl-C is hit, or if a command was executed dapptrace will finish when the command ends.
AUTHOR
Brendan Gregg [Sydney, Australia]
SEE ALSO dappprof(1M), dtrace(1M), apptrace(1)version 1.10 May 14, 2005 dapptrace(1m)