Hello All,
I have oracle running on Solaris 5.10 SPARC 64bit.
Physical memory is 16Gb.
NPROC USERNAME SWAP RSS MEMORY TIME CPU
114 oraprd 13G 13G 82% 513:25:53 0.4%
46 root 180M 225M 1.4% 149:13:33 0.1%
6 daemon 42M 45M 0.3% 14:01:59 0.0%
the above prstat -t shows the usage is 13g+225m+45m ~= 14g
So, there should be 2Gb left free isn't it ?
But top command says only 888m is free.
top
CPU states: 97.3% idle, 1.3% user, 1.4% kernel, 0.0% iowait, 0.0% swap
Memory: 16G phys mem, 888M free mem, 16G swap, 16G free swap
vmstat
0 0 0 15267768 907448 389 1304 0 4 4 0 0 0 0 0 0 1791 6466 2342 1 1 98
Could someone help me figure out where the memory has gone ?
Are there some memory consuming processes which are not shown in prstat ?
TIA,
John
Hi,
kstat -n system_pages
module: unix instance: 0
name: system_pages class: pages
availrmem 461413
crtime 66.127922396
desfree 15917
desscan 25
econtig 71303168
fastscan 139873
freemem 113888
kernelbase 16777216
lotsfree 31834
minfree 7958
nalloc 35809032
nalloc_calls 14227
nfree 25497809
nfree_calls 9262
nscan 0
pagesfree 113888
pageslocked 1541317
pagestotal 2037418
physmem 2042666
pp_kernel 297263
slowscan 100
snaptime 11914951.224096
TIA,
John
2.2 GB (pp_kernel =297263) is used by the kernel. Is isn't shown by prstat as the kernel isn't a process.
Is pp_kernel in Kbytes ? How did you come to the conclusion that the kernel takes 2.2 Gb ?
TIA,
John
These values represent a number of pages. On x86, page size is 4K while on SPARC, it is 8K.
sboots
7
if you are using zfs then that is where its at. zfs caches the memory. download the arcstat.pl script from here if you are.