Hi all. The below output is from a RHEL 4.5 node running a single Oracle instance. I am looking to increase the SGA shortly and am curious about the effects given the current utilization information above. I understand that this system has 770mb of "free" memory and roughly 20gb allocated in buffers & cache. My question is, if I were to increase the SGA by about 4gb, this would take away from available memory that
can be used for buffers and cache, do i run a risk of having some IO issues given the amount of cache that i am currently usiing?
Thank you in advance for any feedback you can provide!
Moderator's Comments:
Please use code tags when posting data and code samples!
Last edited by Franklin52; 01-14-2011 at 05:33 AM..
Using HP-UX v11
Need to monitor cpu and memory usage, total for system and separately for each user in command-line mode.
Found out next ways to monitor total cpu usage under hp-ux:
1) vmstat, also shows free memory
2) sar -M
ps -eo user,pcpu - does not work, means 'user-defined format'... (4 Replies)
What's the best way to find out how much memory is being used/available? I tried using free, but I didn't quite understand the output. Can someone explain it?
$ free
total used free shared buffers cached
Mem: 16304536 16256376 48160 0 ... (6 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 ,
As I am new to Linux server, I am facing some doubts like: On linux server virtual memory usage goes to 99%, but I have Threshold limit of 95%. So it crossed the threshold limit and alarmd.
Yesterday I moniterd the server using TOP command, and found some of Tibco process was consuming... (1 Reply)
Hi ,
As I am new to Linux server, I am facing some doubts like: On linux server virtual memory usage goes to 99%, but I have Threshold limit of 95%. So it crossed the threshold limit and alarmd.
Yesterday I moniterd the server using TOP command, and found some of Tibco process was consuming... (4 Replies)
Hi,
By using time command we can determine the execution time of a process or command.
bash-2.04$ time ls -l
total 0
-rw-r--r-- 1 admin tac 0 Oct 6 04:46 file1
-rw-r--r-- 1 admin tac 0 Oct 6 04:46 file2
real 0m0.002s
user 0m0.000s
sys 0m0.001s... (5 Replies)
/proc/net/sockstat has mem value, Is it memory used for network buffers?
Is it KB or MB?
$ cat /proc/net/sockstat
sockets: used 8278
TCP: inuse 1090 orphan 2 tw 18 alloc 1380 mem 851
UDP: inuse 6574
RAW: inuse 1
FRAG: inuse 0 memory 0
or any other command to montior network... (3 Replies)
i wish to clear memory cache on a production box and i was wondering what is the worst that can happen if i do?
i already tested this on a backup server and everything seemed fine.
but i need to know from you experts what are the worst things that can happen when i run it on a real server:
... (5 Replies)
Hi,
I am new to AIX, Can someone please help me how to know the swap space, total physical memory and system cache?
We are using AIX 5.3.
Thanks! (3 Replies)
Hello
We are in the process of migrating few of our applications in our linux boxes to new linux box to streamline our applications . In this context , i would like to know how we can calculate a particular application is used .?
This data will then be used to select which applications need... (7 Replies)
Discussion started by: ron5174
7 Replies
LEARN ABOUT REDHAT
free
FREE(1) Linux User's Manual FREE(1)NAME
free - display information about free and used memory on the system
SYNOPSIS
free [-b|-k|-m|-g] [-l] [-o] [-t] [-s delay ] [-c count ]
DESCRIPTION free(1) displays the total amount of free and used physical memory and swap space in the system, as well as the buffers and cache consumed
by the kernel.
OPTIONS
Normal invocation of free(1) does not require any options. The output, however, can be fine-tuned by specifying one or more of the follow-
ing flags:
-b, --bytes
Display output in bytes.
-k, --kb
Display output in kilobytes (KB). This is the default.
-m, --mb
Display output in megabytes (MB).
-g, --gb
Display output in gigabytes (GB).
-l, --lowhigh
Display detailed information about low vs. high memory usage.
-o, --old
Use old format. Specifically, do not display -/+ buffers/cache.
-t, --total
Display total summary for physical memory + swap space.
-c n, --count=n
Display statistics n times, then exit. Used in conjunction with the -s flag. Default is to display only once, unless -s was speci-
fied, in which case default is to repeat until interrupted.
-s n, --repeat=n
Repeat, pausing every n seconds in-between.
-V, --version
Display version information and exit.
--help Display usage information and exit
FILES
/proc/meminfo -- memory information
SEE ALSO ps(1), top(1), vmstat(1)AUTHORS
Written by Robert Love.
The procps package is maintained by Rik van Riel and Robert Love and was created by Michael Johnson.
Send bug reports to <procps-list@redhat.com>.
Linux 18 Nov 2002 FREE(1)