what can i do when i see with topas that i have faults of 7000 and 0 in PsgpIn and PsgpOut with some activity on PageIn and PageOut.
Is it normal situation?
High paging faults is known as thrashing in UNIX enviroments and it's not a normal situation at all. In AIX there are some parameters you can set in order to prevent this behavior. Parameters like maxperm|minperm|maxclient in order to free real memory for specific use of file pages.
Before you go tuning anything, call IBM's AIX Support and talk to them regarding this.
Do post the output of below commands:-
And by the way whats your real memory size?
Here is a quick-and-dirty first estimation of a possible memory shortage:
Issue "svmon -G" and compare the numbers marked bold in the following example:
The memory is measured in 4k-pages here. The ~1.5 millions means 6GB real memory therefore. Then compare the "inuse" number with the "virtual" number and if the "virtual" number is significantly higher the difference is about the memory you are lacking. i.e 1.5 mio "inuse" versus 2 mio "virtual" means you need to add about 500k x 4k ~= 2GB memory.
Again, this is only a QUICK and ROUGH estimation, not an in-depth analysis. Such an analysis might well reveal a different number.
Another place to look is "vmstat -v", especially for machines with a high I/O-workload. Have a look at the lines marked bold in the following example:
These are totals therefore repeat that command every minute or so and observe the change in these numbers. If they grow at a very fast rate the system has not enough memory to spare for buffered disk-I/O. Probably you will notice a very bad filesystem performance because of this. Usually this is due to a very constrained memory situation and while you might somewhat deescalate the situation by some tuning you will probably need more memory to solve tis problem.
Hi & good day UNIX / Linux folks,
Some of my > 700 pages don't have this counter:
<!--#exec cgi="/cgi-bin/counter"-->
How would one use find (?!) to know which pages _don't have_ this counter, or - alternatively - which don't have the string:
exec cgi (=bec. probably easier, "exec\... (9 Replies)
Can anyone supply me with the man pages for:
omnidatalist
omnibarlist
omnisap.exe
I prefer the source man pages in nroff format.
A clue about the software bundles which supply these man pages is fine as well.
OS: HP-UX
TIA (11 Replies)
Hi everyone,
I have a small query, in solaris the man pages get displayed on half of the terminal , can i get a full terminal or full screen display ?:) (2 Replies)
Hi,
I am new to linux. I am using more command to view the contents of a file. If the file has many pages i am using f to move forward to the next page.
But when i press f it skips to two pages instead of one page. i checked the man more.
It shows the default is 1. Please share your... (1 Reply)
Hi all.
A friend of mine just recently gave me an old RISC 6000 machine to learn on for my AIX certification. I installed AIX 4.3.3 and everything seems to work fine, except there are no man pages. Is there a way to generate man pages on this machine?
Thanks alot in advance. (5 Replies)
okay.. have monitored that the page out/h max and avg have been 0 for one week. is this possible...? huge applications will have swap space being utilised ... so i am suprised that for one whole week, it has actually been zero
please advise
thanks (1 Reply)
When reading man pages, I notice that sometimes commands are follwed by a number enclosed in parenthesis. such as:
mkdir calls the mkdir(2) system call.
What exactly does this mean? (4 Replies)
Hi,
I've written now a man pages, but I don't knwo how to get 'man' to view them. Where have I to put this files, which directories are allowed??
THX Bensky (3 Replies)