out of memory exception on HP-UX 11.i - help needed

[SSG1]

Hi,
I am trying to execute a java program(JDK 1.3.1) on HP-UX 11.i(64 bit machine). Initially, it ran into an error where it was not able to create new threads. It was suggested that the kernel parameter max_thread_procs be increased to 1024. However,after this was changed the program starts up and after a little while exits with "out of memory exception - possible causes
- out of swap space
- too small MAXDSZ "

The swap space lloks fine to me and I increased the value of MAXDSZ too but it has not helped.

It will really helpful if someone can suggest how to fix this problem.

Thanks in advance

 

[SSG1]

Just an addition ..The exact error that I am getting is :

Exception in thread "CompileThread0" java.lang.OutOfMemoryError: requested 324567891 bytes
Possible causes:
- not enough swap space left, or
- kernel parameter MAXDSIZ is very small.


If anyone has seen this error and solved the problem, your help will be highly appreciated. Thanks

 

[unixqueen]

If you post the output of #swapinfo, the memoy info from #dmesg and the tunable kernel parameter settings we would be able to help further.

Kind Regards
Clare

 

[SSG1]

I am posting the requested information. I will appreciate if you can suggest anything that I can do to not get the "out of memory" error.

Thanks in advance.

Here is the output from swapinfo:

Kb Kb Kb PCT START/ Kb
TYPE AVAIL USED FREE USED LIMIT RESERVE PRI NAME
dev 1638400 996 1637404 0% 0 - 1 /dev/vg00/lvol2
dev 524288 1004 523284 0% 8367268 - 1 /dev/dsk/c2t2d0
reserve - 734108 -734108
memory 740824 42352 698472 6%
total 2903512 778460 2125052 27% - 0 -


Here is the output from dmesg:
gate64: sysvec_vaddr = 0xc0002000 for 2 pages
NOTICE: autofs_link(): File system was registered at index 3.
NOTICE: cachefs_link(): File system was registered at index 5.
NOTICE: nfs3_link(): File system was registered at index 6.
0 sba
0/0 lba
0/0/0/0 btlan
0/0/1/0 c720
0/0/1/0.7 tgt
0/0/1/0.7.0 sctl
0/0/1/1 c720
0/0/1/1.2 tgt
0/0/1/1.2.0 sdisk
0/0/1/1.7 tgt
0/0/1/1.7.0 sctl
0/0/2/0 c720
0/0/2/0.2 tgt
0/0/2/0.2.0 sdisk
0/0/2/0.7 tgt
0/0/2/0.7.0 sctl
0/0/2/1 c720
0/0/2/1.2 tgt
0/0/2/1.2.0 sdisk
0/0/2/1.7 tgt
0/0/2/1.7.0 sctl
0/0/4/0 asio0
0/0/5/0 asio0
0/1 lba
0/2 lba
0/3 lba
0/4 lba
0/4/0/0 c720
0/4/0/0.7 tgt
0/4/0/0.7.0 sctl
0/4/0/1 c720
0/4/0/1.7 tgt
0/4/0/1.7.0 sctl
0/5 lba
0/6 lba
0/7 lba
8 memory
160 processor
btlan: Initializing 10/100BASE-TX card at 0/0/0/0....

System Console is on the Built-In Serial Interface
Entering cifs_init...
Initialization finished successfully... slot is 9
Logical volume 64, 0x3 configured as ROOT
Logical volume 64, 0x2 configured as SWAP
Logical volume 64, 0x2 configured as DUMP
Swap device table: (start & size given in 512-byte blocks)
entry 0 - major is 64, minor is 0x2; start = 0, size = 3276800
Dump device table: (start & size given in 1-Kbyte blocks)
entry 0000000000000000 - major is 31, minor is 0x12000; start = 117600, size = 1638400
Starting the STREAMS daemons-phase 1
Create STCP device files
$Revision: vmunix: vw: -proj selectors: CUPI80_BL2000_1108 -c 'Vw for CUPI80_BL2000_1108 buil
d' -- cupi80_bl2000_1108 'CUPI80_BL2000_1108' Wed Nov 8 19:24:56 PST 2000 $
Memory Information:
physical page size = 4096 bytes, logical page size = 4096 bytes
Physical: 1048576 Kbytes, lockable: 740128 Kbytes, available: 857836 Kbytes


Some of the tunable kernel parameters are as follows:
max_thread_proc 3000
maxdsiz 1073741824
maxdsiz_64bit 1073741824
maxfiles 4096
maxfiles_lim 4096
maxssiz 8388608
maxssiz_64bit 8388608
maxuprc 512
maxusers 32
msgmap 1026
msgmax 65535
msgmnb 65535
msgmni 256
msgseg 32767
msgssz 16
msgtql 1024
nbuf 0
ncallout 6000
nfile 30000
nflocks 8192
ninode 3596
nkthread 6000
nproc 2068
semmni 512
shmmax 966367642
shmmni 300
shmseg 120

 

[unixqueen]

Hi SSG1,

I've done quite a lot of reading and found the following information for you to consider regarding your java error.

http://edocs.bea.com/wls/docs61/perform/JVMTuning.html#1106798

You might see the following java error if you are running out of heap space:

java.lang.OutOfMemoryError <<no stack trace available>>
java.lang.OutOfMemoryError <<no stack trace available>>
Exception in thread &quot;main&quot;

It descibes how to set heap size.

This information is echoed by a thread on the HP forums, but also gives you a tool to help. This is the link

http://bizforums.itrc.hp.com/cm/QuestionAnswer/0,,0x2d37eea29889d611abdb0090277a778c,00.html

Hope that this leads you in the right direction.

Kind Regards
Clare