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CPU% Of Kswapd0 Is Excessively High, Which Is Over 1999% (Doc ID 2691829.1)

Last updated on JULY 17, 2020

Applies to:

Linux OS - Version Oracle Linux 6.0 and later
Information in this document applies to any platform.

Symptoms

√ It was observed that the kswapd0 is a process which is in loop

1 S grid 55876 1 99 80 0 - 618768 ep_pol Jun23 ? 39-05:20:48 ./kswapd0
1 S root 303 2 0 80 0 - 0 kswapd Jun16 ? 00:00:00 [kswapd0]
1 S grid 55876 1 99 80 0 - 618768 ep_pol Jun23 ? 39-05:44:23 ./kswapd0
1 S root 303 2 0 80 0 - 0 kswapd Jun16 ? 00:00:00 [kswapd0]
1 S grid 55876 1 99 80 0 - 618768 ep_pol Jun23 ? 39-06:04:28 ./kswapd0
1 S root 303 2 0 80 0 - 0 kswapd Jun16 ? 00:00:00 [kswapd0]
1 S grid 55876 1 99 80 0 - 618768 ep_pol Jun23 ? 39-06:25:32 ./kswapd0
1 S root 303 2 0 80 0 - 0 kswapd Jun16 ? 00:00:00 [kswapd0]
1 S grid 55876 1 99 80 0 - 618768 ep_pol Jun23 ? 39-06:43:22 ./kswapd0
1 S root 303 2 0 80 0 - 0 kswapd Jun16 ? 00:00:00 [kswapd0]
1 S grid 55876 1 99 80 0 - 618768 ep_pol Jun23 ? 39-07:01:08 ./kswapd0
1 S root 303 2 0 80 0 - 0 kswapd Jun16 ? 00:00:00 [kswapd0]
1 S grid 55876 1 99 80 0 - 618768 ep_pol Jun23 ? 39-07:22:31 ./kswapd0
1 S root 303 2 0 80 0 - 0 kswapd Jun16 ? 00:00:00 [kswapd0]
1 S grid 55876 1 99 80 0 - 618768 ep_pol Jun23 ? 39-07:42:36 ./kswapd0
1 S root 303 2 0 80 0 - 0 kswapd Jun16 ? 00:00:00 [kswapd0]
1 S grid 55876 1 99 80 0 - 618768 ep_pol Jun23 ? 39-08:05:39 ./kswapd0

√ /proc/PID Kswapd/maps what is showing linked libs and the loop?

$ cat 50777/maps

5563697e0000-5563697f6000 r--p 00000000 fb:00 270408 /home/grid/.configrc/a/kswapd0
5563697f6000-5563699b2000 r-xp 00016000 fb:00 270408 /home/grid/.configrc/a/kswapd0
5563699b2000-556369a20000 r--p 001d2000 fb:00 270408 /home/grid/.configrc/a/kswapd0
556369a20000-556369a2b000 rw-p 0023f000 fb:00 270408 /home/grid/.configrc/a/kswapd0
556369a2b000-556369a39000 rw-p 00000000 00:00 0
55636a9ec000-55636aa30000 rw-p 00000000 00:00 0 [heap]
55636aa30000-55636abeb000 rw-p 00000000 00:00 0 [heap]
7f3f30e00000-7f3f31000000 rw-p 00000000 00:0f 156532832 /anon_hugepage (deleted)
7f3f31000000-7f3f31200000 rw-p 00000000 00:0f 156532058 /anon_hugepage (deleted)
7f3f31200000-7f3f31400000 rw-p 00000000 00:0f 156520331 /anon_hugepage (deleted)
7f3f31400000-7f3f31600000 rw-p 00000000 00:0f 156494736 /anon_hugepage (deleted)
7f3f31600000-7f3f31800000 rw-p 00000000 00:0f 156543189 /anon_hugepage (deleted)
7f3f31800000-7f3f31a00000 rw-p 00000000 00:0f 156542272 /anon_hugepage (deleted)
7f3f31a00000-7f3f31c00000 rw-p 00000000 00:0f 156511187 /anon_hugepage (deleted)

√ The running kswapd0 is having a binary execution?

Directory in  /home/grid/.configrc/a
$ ls -alrt

-rwxrwxrwx 1 grid oinstall 599 Jun 30 02:32 stop
-rwxrwxrwx 1 grid oinstall 227 Jun 30 02:32 run
-rwxrwxrwx 1 grid oinstall 2401096 Jun 30 02:32 kswapd0
-rwxrwxrwx 1 grid oinstall 9371 Jun 30 02:32 init0
-rwxrwxrwx 1 grid oinstall 876 Jun 30 02:32 a
-rw-r--r-- 1 grid oinstall 11 Jun 30 02:32 .procs
-rwxrwxrwx 1 grid oinstall 202 Jun 30 02:32 upd
drwxr-xr-x 4 grid oinstall 4096 Jun 30 02:32 ..
drwxr-xr-x 2 grid oinstall 4096 Jul 7 01:01 .
-rwxrwxrwx 1 grid oinstall 23 Jul 7 01:01 dir.dir
-rw-r--r-- 1 grid oinstall 1 Jul 7 01:01 bash.pid

Cause

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In this Document
Symptoms
Cause
Solution
References


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