SWAP 100% FULL

[B. Hulst]

Hi,

If the system is running full over time here is a memory leak in one of your applications.

Quite often it is in a self made application, since Off the shelf applications should be tested against memory leaks. ;-)

These tools can be used to measure the amount of swapping in your system.
iostat (for the swap volume)
vmstat (for swap stats)

man iostat or man vmstat give you the options.

Regards,
Bob

[Ritter Philippe]

Ok, here is my sysdef :
NAME VALUE BOOT MIN-MAX UNITS FLAGS
acctresume 4 - -100-100 -
acctsuspend 2 - -100-100 -
allocate_fs_swapmap 0 - - -
bufpages 131072 - 0- Pages -
create_fastlinks 0 - - -
dbc_max_pct 50 - - -
dbc_min_pct 5 - - -
default_disk_ir 0 - - -
dskless_node 0 - 0-1 -
eisa_io_estimate 768 - - -
eqmemsize 46 - - -
file_pad 10 - 0- -
fs_async 0 - 0-1 -
hpux_aes_override 0 - - -
maxdsiz 65536 - 0-503866 Pages -
maxdsiz_64bit 262144 - 1024-1073479679 Pages -
maxfiles 2048 - 30-2048 -
maxfiles_lim 2048 - 30-2048 -
maxssiz 2048 - 0-98048 Pages -
maxssiz_64bit 2048 - 4-262144 Pages -
maxswapchunks 8192 - 1-16384 -
maxtsiz 16384 - 0-503859 Pages -
maxtsiz_64bit 262144 - 1024-1073741823 Pages -
maxuprc 256 - 3- -
maxvgs 10 - - -
msgmap 39 - 3- -
nbuf 68646 - 0- -
ncallout 2064 - 6- -
ncdnode 150 - - -
ndilbuffers 30 - 1- -
netisr_priority -1 - -1-127 -
netmemmax 0 - - -
nfile 2302 - 14- -
nflocks 512 - 2- -
ninode 1340 - 14- -
no_lvm_disks 0 - - -
nproc 1044 - 10- -
npty 60 - 1- -
nstrpty 60 - - -
nswapdev 10 - 1-25 -
nswapfs 10 - 1-25 -
public_shlibs 1 - - -
remote_nfs_swap 0 - - -
rtsched_numpri 32 - - -
sema 0 - 0-1 -
semmap 63 - 4- -
shmem 0 - 0-1 -
shmmni 200 - 3-1024 -
streampipes 0 - 0- -
swapmem_on 1 - - -
swchunk 2048 - 2048-16384 kBytes -
timeslice 10 - -1-2147483648 Ticks -
unlockable_mem 32768 - 0- Pages -

[bhavin asokan · Accepted solution]

hi,

see on the line.
dbc_max_pct 50 - - -

dbc_max_pct 50 means it can take up to 50% of your physical memory for buffer cache.for your system(8GB) it can be up to 4GB which is a waste.

memory of 600-800MB willbe much enough for buffer cache.

reduce the value of dbc_max_pct parameter in kernel to a value of 10 . it will free a lot of space in your system.

note: it is a ststic parameter.you must have to rebuild the kernel for changing it.use sam.it is safe.

regds,