So seems like there is around 3G free memory which does match with the vmstat o/p
I am concerned about this issue as we did face memory contingency on this node when the other node failed over resulting in around 5000 sessions using this node.
Sessions were failing constantly due to memory issues, the issue was sorted only after fixing the other node. There was huge amount of swapping going on too.
sga max is set to 5G which is 1/6th of total RAM size. So this would mean more than 25G is consumed by PGA when failover occurs but when I check the PGA usage on both the instances it is around 6G per instance, so the combined usage is less than 12G and thats the reason I am confused.
So I am not sure whether there is some other clusterware process or java process that is consuming all the memory. From the ps -ef OS command I see around 300 each of these connections.
So I am not sure how to check the total memory consumption of these processes as I cannot sum them as this might give me a false value due to child processes involved. Is there any way for me to identify the actual memory usage of these processes?
Last edited by radoulov; 09-29-2010 at 05:14 AM..
Reason: Added code tags.
Hello:
Environment is: Oracle 817 on IBM RS/6000 AIX 433
I have 4GB RAM on the box and Page/Swap is about the same.
Presently I am using close to 1GB of RAM towards 5 instances of ORACLE production environments.
How can I know, how much of memory/RAM is used for :
Oracle Processes , I... (2 Replies)
Hi all,
Without oracle tunning I understand that oracle processes always run on a single CPU at a time (the prstat output always show 1 CPU number) even on multi-processor hardware.
Is it correct?
Regards, (1 Reply)
Hello,
I'm looking for a command or script that could permit me to know what is memory usage group by HP-UX kernel, oracle processes and other users (specific software).
A command like 'top' but for all processes and not only for 12 max could be very useful
Thanks in advance (4 Replies)
how can I find cpu usage memory usage swap usage and
I want to know CPU usage above X% and contiue Y times and memory usage above X % and contiue Y times
my final destination is monitor process
logical volume usage above X % and number of Logical voluage above
can I not to... (3 Replies)
Hi,
I'm running a multi-process software system on a Solaris 8 machine. When I monitor the memory usage, I see that the free memory is dropping rapidly, but I can't detect a process that uses this memory.
I'm using "top" to get the free memory and the memory usage of processes.
Thanks. (3 Replies)
Hi All,
We have a server with Solaris 10 installed. The total memory of the server is 64GB. In order to check the memory info of the server I use "top" utility that gives me total and free memory in real-time.
I have also installed a Sun container (non-global zone) on top of parent operating... (4 Replies)
Hello Gurus,
In Office, I have unix Solaris Server. Oracle and Java is installed on Solaris Server.
Oracle when starts then oracle loads SGA, PGA memory and graps solaris server memory. In the same manner java and other applications grabs memory for them.
I want memory distribution of... (4 Replies)
One of my Solaris Unix server has total RAM 128G . top & vmstat command shows free memory is 86G and usage is 42G.
ps -eo pid,rss,commshows memory usage by process. when i sum all the memory usage by the process, it shows 1.9TB as shown below.
$ ps -eo pid,pmem,vsz,rss,comm | sort -rnk2 |... (5 Replies)
Hi All,
In one of the solaris box aslert got triggered as ...
(Used_Real_Mem_Pct=93.0 Used_Swap_Space_Pct=75.0 )]
when i see the usage by vmstat and sar i am not able to relate the alert with the free memory and swap memory
please help to understand the vmstat output as below..
kthr ... (4 Replies)
Discussion started by: Riverstone
4 Replies
LEARN ABOUT PLAN9
vmstat
vmstat(1M) System Administration Commands vmstat(1M)NAME
vmstat - report virtual memory statistics
SYNOPSIS
vmstat [-cipqsS] [disks] [ interval [count]]
DESCRIPTION
vmstat reports virtual memory statistics regarding kernel thread, virtual memory, disk, trap, and CPU activity.
On MP (multi-processor) systems, vmstat averages the number of CPUs into the output. For per-processor statistics, see mpstat(1M).
vmstat only supports statistics for certain devices. For more general system statistics, use sar(1), iostat(1M), or sar(1M).
Without options, vmstat displays a one-line summary of the virtual memory activity since the system was booted.
During execution of the kernel status command, the state of the system can change. If relevant, a state change message is included in the
vmstat output, in one of the following forms:
<<device added: sd0>>
<<device removed: sd0>>
<<processors added: 1, 3>>
<<processors removed: 1, 3>>
See System Administration Guide: Advanced Administration for device naming conventions for disks.
OPTIONS
The following options are supported:
-c Report cache flushing statistics. This option is obsolete, and no longer meaningful. This option might be removed in a future
version of Solaris.
-i Report the number of interrupts per device. count and interval does not apply to the -i option.
-p Report paging activity in details. This option will display the following, respectively:
epi Executable page-ins.
epo Executable page-outs.
epf Executable page-frees.
api Anonymous page-ins.
apo Anonymous page-outs.
apf Anonymous page-frees.
fpi File system page-ins.
fpo File system page-outs.
fpf File system page-frees.
When executed in a zone and if the pools facility is active, all of the above only report actitivity on the processors in the pro-
cessor set of the zone's pool.
-q Suppress messages related to state changes.
-s Display the total number of various system events since boot. count and interval does not apply to the -s option.
-S Report on swapping rather than paging activity. This option will change two fields in vmstat's ``paging'' display: rather than the
``re'' and ``mf'' fields, vmstat will report ``si'' (swap-ins) and ``so'' (swap-outs).
OPERANDS
The following operands are supported:
count Specifies the number of times that the statistics are repeated. count does not apply to the -i and -s options.
disks Specifies which disks are to be given priority in the output (only four disks fit on a line). Common disk names are id, sd,
xd, or xy, followed by a number (for example, sd2, xd0, and so forth).
interval Specifies the last number of seconds over which vmstat summarizes activity. This number of seconds repeats forever. inter-
val does not apply to the -i and -s options.
EXAMPLES
Example 1: Using vmstat
The following command displays a summary of what the system is doing every five seconds.
example% vmstat 5
kthr memory page disk faults cpu
r b w swap free re mf pi p fr de sr s0 s1 s2 s3 in sy cs us sy id
0 0 0 11456 4120 1 41 19 1 3 0 2 0 4 0 0 48 112 130 4 14 82
0 0 1 10132 4280 0 4 44 0 0 0 0 0 23 0 0 211 230 144 3 35 62
0 0 1 10132 4616 0 0 20 0 0 0 0 0 19 0 0 150 172 146 3 33 64
0 0 1 10132 5292 0 0 9 0 0 0 0 0 21 0 0 165 105 130 1 21 78
1 1 1 10132 5496 0 0 5 0 0 0 0 0 23 0 0 183 92 134 1 20 79
1 0 1 10132 5564 0 0 25 0 0 0 0 0 18 0 0 131 231 116 4 34 62
1 0 1 10124 5412 0 0 37 0 0 0 0 0 22 0 0 166 179 118 1 33 67
1 0 1 10124 5236 0 0 24 0 0 0 0 0 14 0 0 109 243 113 4 56 39
^C
example%
The fields of vmstat's display are
kthr Report the number of kernel threads in each of the three following states:
r the number of kernel threads in run queue
b the number of blocked kernel threads that are waiting for resources I/O, paging, and so forth
w the number of swapped out lightweight processes (LWPs) that are waiting for processing resources to finish.
memory Report on usage of virtual and real memory.
swap available swap space (Kbytes)
free size of the free list (Kbytes)
page Report information about page faults and paging activity. The information on each of the following activities is given in
units per second.
re page reclaims -- but see the -S option for how this field is modified.
mf minor faults -- but see the -S option for how this field is modified.
pi kilobytes paged in
po kilobytes paged out
fr kilobytes freed
de anticipated short-term memory shortfall (Kbytes)
sr pages scanned by clock algorithm
When executed in a zone and if the pools facility is active, all of the above (except for "de") only report activity on the
processors in the processor set of the zone's pool.
disk Report the number of disk operations per second. There are slots for up to four disks, labeled with a single letter and
number. The letter indicates the type of disk (s = SCSI, i = IPI, and so forth); the number is the logical unit number.
faults Report the trap/interrupt rates (per second).
in interrupts
sy system calls
cs CPU context switches
When executed in a zone and if the pools facility is active, all of the above only report actitivity on the processors in
the processor set of the zone's pool.
cpu Give a breakdown of percentage usage of CPU time. On MP systems, this is an average across all processors.
us user time
sy system time
id idle time
When executed in a zone and if the pools facility is active, all of the above only report actitivity on the processors in
the processor set of the zone's pool.
ATTRIBUTES
See attributes(5) for descriptions of the following attributes:
+-----------------------------+-----------------------------+
| ATTRIBUTE TYPE | ATTRIBUTE VALUE |
+-----------------------------+-----------------------------+
|Availability |SUNWcsu |
+-----------------------------+-----------------------------+
|Interface Stability |See below. |
+-----------------------------+-----------------------------+
Invocation is evolving. Human readable output is unstable.
SEE ALSO sar(1), iostat(1M), mpstat(1M), sar(1M), attributes(5)
System Administration Guide: Basic Administration
System Administration Guide: Advanced Administration
NOTES
The sum of CPU utilization might vary slightly from 100 because of rounding errors in the production of a percentage figure.
The -c option (Report cache flushing statistics) is not supported in this release.
SunOS 5.10 20 Dec 2004 vmstat(1M)