topic Re: maxtsiz in Operating System - HP-UX

maxtsiz

dhanish — Wed, 03 Jul 2002 09:43:08 GMT

i am geting the follwoing error ..when i say java -version

/usr/lib/dld.sl: Call to mmap() failed - TEXT /opt/java1.3/bin/../jre/lib/PA_RIS
C2.0/server/libjvm.sl
/usr/lib/dld.sl: Not enough space

any clues ????

Re: maxtsiz

Stefan Farrelly — Wed, 03 Jul 2002 09:47:29 GMT

youre right, its probably a kernel parameter. More likely maxdsiz (or maxdsiz_64bit if your system is running 64bit OS). I would increase all these 3 to be safe;

maxtsiz
maxssiz
maxdsiz

and reboot and retry.

Re: maxtsiz

T G Manikandan — Wed, 03 Jul 2002 10:05:16 GMT

I probably assume that there is a shortage of memory on the machine.

Try stopping the processes which are not required and try running it again.

you can use
UNIX95= ps -e -o ruser,pid,vsz=Kbytes|more

to find out the memory usage of each process.

Even you can try increasing your swap space.

Also check you have enough values for

maxdsiz
parameter

Re: maxtsiz

dhanish — Wed, 03 Jul 2002 10:09:27 GMT

Hi , is there any command to find out the usage of these parameters in OS.

thnks

Re: maxtsiz

steven Burgess_2 — Wed, 03 Jul 2002 10:20:12 GMT

Hi

To get your current values (depending on OS)

sysdef | grep maxtsiz
kmtune | grep maxtsiz

glance -t

will show current running values, though can't remember whever maxt values are shown.Don't think they are

HTH

Steve

Re: maxtsiz

dhanish — Wed, 03 Jul 2002 11:04:16 GMT

hi,
i am referring to the comands ...sar or vmstat or iostat...can i see text segment usage ..with any of these commands

Re: maxtsiz

Bill Hassell — Wed, 03 Jul 2002 12:02:16 GMT

sar -v 1
will show you nproc and nfile. However, you don't have a problem with maxtsiz unless your program has several MILLION lines of code. maxtsiz is the maximum size of the text area, the quadrant containing unchanging instructions and this area is closely proportional to the number of lines of real code (or more accurately, the number of instructions generated by the compiler).

The default for maxtsiz is 64 megs which is good for all but massively large programs. Now maxdsiz is likely the problem. It is the data area size and the default (64 megs) is way too low for today's big programs. Change the kernel parameter maxdsiz to about 500-900 megs. The value is unimportant as maxdsiz is just a fence to protect from bad programs using up lots of RAM. The above error message indicates that a shared library (the .sl file) doesn't have enough room to be loaded or run.

You could set it to the max for standard 32bit programs (940 megs) and then impose a soft limit on each user in /etc/profile by specifying:

ulimit -Sd 100000

which means everyone is limited to 100megs of data area maximum, but by putting:

ulimit -Sc 300000

in a startup script or in .profile, the subsequent processes can grow to 300 megs.

Another likely problem with the above error message is that you are out of swap space. Use swapinfo -tm to see what the device swap looks like. If it is a high percentage (>80%) then you can add more swap but you're probably have less than 1/3 of the required RAM to provide reasonable performance. Use vmstat to determine the po (Page Out) rate when the system is busy. Anything larger than a single digit indicates lack of RAM and therefore, very slow execution speeds.

Re: maxtsiz

dhanish — Thu, 04 Jul 2002 06:50:10 GMT

Hi,
I see the cpu usage of 100 % in the machine. ..is that can be the reason ..??
...........................................
Bill you wrote ....

The above error message indicates that a shared library (the .sl file) doesn't have enough room to be loaded or run.

You could set it to the max for standard 32bit programs (940 megs) and then impose a soft limit on each user in /etc/profile by specifying

ulimit -Sd 100000

which means everyone is limited to 100megs of data area maximum, but by putting:

ulimit -Sc 300000

...............................................

so to provide enough room for the did.sl to run , i should specify
ulimit -Sd 100000 ...is it correct ??