Hi,
I received an alarm "Free memory too low" from Zabbix for WLC 5508.
The product version is:
Product Version.................................. 8.0.152.0
(Cisco Controller) >show memory summary
-------------------------- System Memory Summary -------------------------
System Name:WC1 Primary SW Ver:8.0.152.0
Current Time:Mon Jul 18 08:58:00 2022 System UP Time:483 days 0 hrs 6 mins 23 secs
NAME: "Chassis" , DESCR: "Cisco 5500 Series Wireless LAN Controller"
PID: AIR-CT5508-K9, VID: V02, SN: F**5****B2
Total System Memory.............................. (1003000 KB) 979 MB
Total System Free Memory......................... (12104 KB) 11 MB (1 %)
Total Memory in Buffers.......................... (380 KB)
Total Memory in Cache............................ (119312 KB) 116 MB
Total Active Memory.............................. (879444 KB) 858 MB
Total InActive Memory............................ (38612 KB) 37 MB
Total Memory in Anon Pages....................... (798364 KB) 779 MB
Total Memory in Slab............................. (44600 KB) 43 MB
Total Memory in Page Tables...................... (2656 KB) 2 MB
WLC Peak Memory.................................. (1249364 KB) 1220 MB
WLC Virtual Memory Size.......................... (1247256 KB) 1218 MB
WLC Resident Memory.............................. (831004 KB) 811 MB
WLC Data Segment Memory.......................... (1179348 KB) 1151 MB
Total Heap Including Mapped Pages................ (263492 KB) 257 MB
Total Memory in Pmalloc Pools.................... (634935 KB) 620 MB
Total Used Memory in Pmalloc Pools............... (613843 KB) 599 MB
Total Free Memory in Pmalloc Pools............... (21089 KB) 20 MB
--More-- or (q)uit
------------------------- Pmalloc Pools Information --------------------
Index Pool-Size Chunks-In-Pool Chunks-In-Use Memory(Size/Used/Free)KB
0 16 50000 23645 3320 /2908 /411
1 64 50300 50012 5698 /5680 /18
2 128 22300 22097 3919 /3894 /25
3 256 1357200 1357126 408220 /408201 /18
4 384 6000 333 2554 /429 /2125
5 512 24900 20017 13714 /11272 /2441
6 1024 3500 591 3677 /768 /2909
7 2048 7100 2223 14560 /4806 /9754
8 4096 1000 153 4050 /662 /3388
9 Raw-Pool 0 401 175203 /175203 /0
(Cisco Controller) >show system meminfo
MemTotal: 1003000 kB
MemFree: 11692 kB
Buffers: 380 kB
Cached: 119312 kB
SwapCached: 0 kB
Active: 878648 kB
Inactive: 38612 kB
SwapTotal: 0 kB
SwapFree: 0 kB
Dirty: 0 kB
Writeback: 0 kB
AnonPages: 797568 kB
Mapped: 38596 kB
Slab: 44668 kB
SReclaimable: 3436 kB
SUnreclaim: 41232 kB
PageTables: 2656 kB
NFS_Unstable: 0 kB
Bounce: 0 kB
CommitLimit: 501500 kB
Committed_AS: 1218312 kB
(Cisco Controller) >show memory allocations
SlNo Memory Magic0 Magic1 PoolSz Length PID Module Loc Time Metadata
-------------------------------------------------------------------------------------------------------------------------
1 0x2b88c974 0xbe90be90 0xbe91be91 16 8 1514 sisf_shim_utils 641 41731169 0x00002305 0x0c93bd89
2 0x2b88f36c 0xbe90be90 0xbe91be91 16 8 1514 sisf_shim_utils 641 41731169 0x00000c0e 0x0c93bd88
3 0x2b88fba8 0xbe90be90 0xbe91be91 16 8 1514 sisf_shim_utils 641 41731168 0x000023f2 0x0c93bd75
4 0x2b89541c 0xbe90be90 0xbe91be91 16 8 1514 sisf_shim_utils 641 41731161 0x000015dd 0x0c93bce8
5 0x2b8924d4 0xbe90be90 0xbe91be91 16 8 1514 sisf_shim_utils 641 41731155 0x00001219 0x0c93bc68
6 0x2b88f9cc 0xbe90be90 0xbe91be91 16 8 1514 sisf_shim_utils 641 41731150 0x00000df2 0x0c93bbf9
7 0x2b9633b8 0xbe90be90 0xbe91be91 16 8 1514 sisf_shim_utils 641 41731145 0x00001bdd 0x0c93bba3
8 0x2b8901c4 0xbe90be90 0xbe91be91 16 8 1514 sisf_shim_utils 641 41731141 0x00001c6b 0x0c93bb66
9 0x2b96719c 0xbe90be90 0xbe91be91 16 11 1349 k_mib_bsnwras 2964 41731119 0x2b9671d4 0x00000003
10 0x2b8932a4 0xbe90be90 0xbe91be91 16 8 1349 k_mib_bsnwras 2947 41731119 0x2b8932dc 0x00000000
11 0x2b8c5af0 0xbe90be90 0xbe91be91 16 14 1349 k_mib_bsnwras 2889 41731119 0x2b8c5b28 0x00000006
12 0x2b88db84 0xbe90be90 0xbe91be91 16 14 1349 k_mib_bsnwras 2883 41731119 0x2b88dbbc 0x00000006
13 0x2b898e8c 0xbe90be90 0xbe91be91 16 14 1349 k_mib_bsnwras 3300 41731119 0x2b898ec4 0x00000006
14 0x2b8c9f34 0xbe90be90 0xbe91be91 16 16 1532 ew_buffer 387 41731116 0x2b8caa04 0x2b890e2c
15 0x2b890dfc 0xbe90be90 0xbe91be91 16 8 1532 ew_buffer 458 41731116 0x2b902f48 0x00000100
16 0x2b8916c0 0xbe90be90 0xbe91be91 16 8 1514 sisf_shim_utils 641 41731108 0x000021a9 0x0c93b923
17 0x2b8957d4 0xbe90be90 0xbe91be91 16 8 1514 sisf_shim_utils 641 41731106 0x000023e0 0x0c93b8fe
18 0x2b890318 0xbe90be90 0xbe91be91 16 8 1514 sisf_shim_utils 641 41731106 0x0000166e 0x0c93b8fd
19 0x2b89772c 0xbe90be90 0xbe91be91 16 8 1514 sisf_shim_utils 641 41731097 0x00001a88 0x0c93b86f
--More-- or (q)uit
20 0x2b89354c 0xbe90be90 0xbe91be91 16 8 1514 sisf_shim_utils 641 41731070 0x00001496 0x0c93b681
21 0x2b977cd4 0xbe90be90 0xbe91be91 16 8 1514 sisf_shim_utils 641 41731065 0x00001a0c 0x0c93b646
22 0x2b8da560 0xbe90be90 0xbe91be91 16 8 1514 sisf_shim_utils 641 41731058 0x000023aa 0x0c93b5b4
23 0x2b8c63b4 0xbe90be90 0xbe91be91 16 8 1514 sisf_shim_utils 641 41731056 0x00001e58 0x0c93b582
24 0x2b88f3b0 0xbe90be90 0xbe91be91 16 8 1514 sisf_shim_utils 641 41731053 0x000023f1 0x0c93b56a
25 0x2b8b510c 0xbe90be90 0xbe91be91 16 12 1349 k_mib_bsnwras 838 41731051 0x2b8b5144 0x00000004
26 0x2b8943a4 0xbe90be90 0xbe91be91 16 12 1349 k_mib_bsnwras 829 41731051 0x2b8943dc 0x00000004
27 0x2b890428 0xbe90be90 0xbe91be91 16 12 1349 k_mib_bsnwras 820 41731051 0x2b890460 0x00000004
28 0x2b893508 0xbe90be90 0xbe91be91 16 12 1349 k_mib_bsnwras 811 41731051 0x2b893540 0x00000004
29 0x2b88f25c 0xbe90be90 0xbe91be91 16 12 1349 k_mib_bsnwras 802 41731051 0x2b88f294 0x00000004
30 0x2b8940b8 0xbe90be90 0xbe91be91 16 12 1349 k_mib_bsnwras 793 41731051 0x2b8940f0 0x00000004
31 0x2b890d30 0xbe90be90 0xbe91be91 16 12 1349 k_mib_bsnwras 733 41731051 0x2b890d68 0x00000004
32 0x2b88f504 0xbe90be90 0xbe91be91 16 8 1349 k_mib_bsnwras 682 41731051 0x2b88f53c 0x00000000
33 0x2b88cfd4 0xbe90be90 0xbe91be91 16 8 1349 k_mib_bsnwras 671 41731051 0x2b88d00c 0x00000000
34 0x2b8b4eec 0xbe90be90 0xbe91be91 16 12 1349 k_mib_bsnwras 616 41731051 0x2b8b4f24 0x00000004
35 0x2b88de2c 0xbe90be90 0xbe91be91 16 12 1349 k_mib_bsnwras 557 41731051 0x2b88de64 0x00000004
36 0x2b892490 0xbe90be90 0xbe91be91 16 14 1349 k_mib_bsnwras 8661 41731051 0x2b8924c8 0x00000006
37 0x2b8e03ac 0xbe90be90 0xbe91be91 16 8 1514 sisf_shim_utils 641 41731051 0x00001870 0x0c93b534
38 0x2b898188 0xbe90be90 0xbe91be91 16 8 1514 sisf_shim_utils 641 41731050 0x00000d37 0x0c93b521
39 0x2b88e888 0xbe90be90 0xbe91be91 16 8 1514 sisf_shim_utils 641 41731040 0x00000d35 0x0c93b470
40 0x2b890648 0xbe90be90 0xbe91be91 16 8 1514 sisf_shim_utils 641 41731039 0x000013c4 0x0c93b451
Fetched total 40 entries. Skipped 0 entries.
(Cisco Controller) >show memory mbuf summary
Maximum number of Mbufs.......................... 4608
Number of Mbufs Free............................. 4593
Number of Mbufs In Use........................... 15
(Cisco Controller) >show memory monitor
Memory Leak Monitor Status:
low_threshold(10000), high_threshold(30000), current status(disabled)
-------------------------------------------
Memory Error Monitor Status:
Crash-on-error flag currently set to (enabled)
No memory error detected.
(Cisco Controller) >show memory statistics
System Memory Statistics:
Total System Memory............: 1027072000 bytes (979.56 MB)
Used System Memory.............: 888586240 bytes (847.48 MB)
Free System Memory.............: 138485760 bytes (132.07 MB)
Bytes allocated from RTOS......: 75318076 bytes (71.83 MB)
Chunks Free....................: 30 bytes
Number of mmapped regions......: 52
Total space in mmapped regions.: 194498560 bytes (185.50 MB)
Total allocated space..........: 74181188 bytes (70.74 MB)
Total non-inuse space..........: 1136888 bytes (1.08 MB)
Top-most releasable space......: 866824 bytes (846.50 KB)
Total allocated (incl mmap)....: 269816636 bytes (257.33 MB)
Total used (incl mmap).........: 268679748 bytes (256.25 MB)
Total free (incl mmap).........: 1136888 bytes (1.08 MB)
(Cisco Controller) >show sysinfo
Manufacturer's Name.............................. Cisco Systems Inc.
Product Name..................................... Cisco Controller
Product Version.................................. 8.0.152.0
Bootloader Version............................... 1.0.20
Field Recovery Image Version..................... 6.0.182.0
Firmware Version................................. FPGA 1.7, Env 1.8, USB console 2.2
Build Type....................................... DATA + WPS
System Name...................................... WC1
System Location..................................
System Contact...................................
System ObjectID.................................. 1.3.6.1.4.1.9.1.1069
Redundancy Mode.................................. Disabled
IP Address....................................... 192.168.1.99
IPv6 Address..................................... ::
Last Reset....................................... Software reset
System Up Time................................... 483 days 0 hrs 7 mins 58 secs
System Timezone Location......................... (GMT +2:00) Jerusalem
System Stats Realtime Interval................... 5
System Stats Normal Interval..................... 180
Configured Country............................... BG - Bulgaria
--More-- or (q)uit
Operating Environment............................ Commercial (0 to 40 C)
Internal Temp Alarm Limits....................... 0 to 65 C
Internal Temperature............................. +37 C
External Temperature............................. +23 C
Fan Status....................................... OK
State of 802.11b Network......................... Enabled
State of 802.11a Network......................... Enabled
Number of WLANs.................................. 7
Number of Active Clients......................... 100
Burned-in MAC Address............................ 30:E4:DB:1B:BB:60
Power Supply 1................................... Present, OK
Power Supply 2................................... Absent
Maximum number of APs supported.................. 500
System Nas-Id....................................
WLC MIC Certificate Types........................ SHA1/SHA2
Do you have an idea how to handle with high memory usage?
Should I plan reboot of the WLC?
Thank you in advance.
Best Regards.
