Huge Memory Consumption

Hello Everyone,

I have been checking a maxdb system and can see huge memory consumption occurring:

top - 12:29:10 up 842 days,  2:59,  5 users,  load average: 18.59, 17.80, 11.77

Tasks: 728 total,   2 running, 723 sleeping,   0 stopped,   3 zombie

Cpu(s):  8.5%us,  0.7%sy,  0.0%ni, 88.8%id,  0.3%wa,  0.0%hi,  0.3%si,  1.4%st

Mem:     47509M total,    47129M used,      379M free,      210M buffers

Swap:    20479M total,     1475M used,    19004M free,     5386M cached

  PID USER      PR  NI  VIRT  RES  SHR S %CPU %MEM    TIME+  COMMAND

26644 sdb       20   0 39.8g  38g 306m S  126 82.3  52654:06 kernel

7136 sdb       20   0 77304  16m 4692 S    8  0.0   1:12.69 dbmsrv

2860 root      20   0     0    0    0 S    3  0.0   2837:24 nfsiod

  208 root      20   0     0    0    0 S    2  0.0   2448:01 rpciod/2

I could not see any long running db transactions, background jobs, deadlocks

Please provide any valuable inputs on how to check the issue further

Regards,

Vinay