Topas is performance monitoring tool in AIX, so that i ask you how to capture the % Comp and % noncomp from topas command.
Yes, but "topas" is designed for interactive use only. If you want to skim the values from some output stream you should use "vmstat" rather than "topas" because "vmstat"s output is a character stream whereas "topas"s output is full of control characters necessary for the screen control.
First: what is computational and non-computational memory? Memory is allocated controlled by some "vmo" (see "man vmo") tunables: "minperm%", "maxperm%", "minclient", "maxclient", "lrud_file_repage", ... Basically the AIX kernel tries to put otherwise unused memory to some use dedicating some part (the tunables control how big this part is) of it to the file cache. "Computational memory" is the part of the memory in use given to running processes. "Non-Computational memory" is the memory used for file cache (and a few other buffers of minor significance). Together, computational and non-computational memory is "used memory".
"minperm%" and "maxperm%" control when and under which circumsteances non-computational memory is changed to computational memory and vice versa (which is done by the lrud-daemon), "numperm%" tells you, where - in between minperm and maxperm - you are right now.
After this rather lengthy explanations, here is a sample output of "vmstat -v" (AIX 7.1, idle system):
I have marked the relevant lines bold: numperm percentage is the (%) amount of memory currently used by the file cache. Compare this to the number of totally allocated pages and you get the sizes of computational and non-computational memory. Note, that some numbers are percentages, some numbers are memory pages! Memory pages can be various sizes in AIX, but the most common are 4k. So, for instance, "2500" is roughly 10M.
hi,
how can i diplay:
- the ammount RAM used /free
- ammount of ram used from a pid or prozess
we have the problem, that malloc is returing a NULL pointer errno = 12 ( not enough space).
but i think there is still ram free.
nmon : shows all memory used ?
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Hi,
I have two files say file 1 file 2
File1
1
2
4
5
File 2
asdf
adf
How to get the ouput something like
asdf1
adf1
asdf2
adf2
asdf4
adf4
asdf5 (5 Replies)
Hello Gurus,
I am using AIX 5 and on running topas command. I can see the computational memory is 93.3% with Swap Paging memory at 2.2%. Could you please advise if there is any impact by the growth of computational memory?
Below is the stat:
MEMORY
Real,MB 22528
% Comp 93.3
%... (12 Replies)
Hi,
I'm planning to write a script to monitor the memory utilization and so decided to use topas. i'm not familiar with this command
Could anyone help me with an idea on how to display the Memory section alone in the topas... :)
It will be very helpful if you could specify the command... (2 Replies)
Dear,
How to calculate %computational memory and %non computational memory from AIX server.
What command used to find out %computational memory and % non computational memory except topas.
Regards
Nowshath (1 Reply)