Hi All,
I have high memory utilization occurring intermittently on multiple 2950 switches running IOS 12.1(22)EA14. The memory utilization is oscillating between 90% to 92%, with an average usage of 90%. One common thing noticed among all switches is the high number of buffer failures. Please find the logs below. Could anyone advise if these are some Cisco IOS bugs or a cause of concern ? Also let me know, if more information is required.
Switch 1# show buffers
Buffer elements:
498 in free list (500 max allowed)
356897384 hits, 0 misses, 0 created
Public buffer pools:
Small buffers, 104 bytes (total 38, permanent 25, peak 181 @ 7w0d):
37 in free list (20 min, 60 max allowed)
588818807 hits, 12160 misses, 21642 trims, 21655 created
3 failures (0 no memory)
Middle buffers, 600 bytes (total 18, permanent 15, peak 63 @ 7w0d):
18 in free list (10 min, 30 max allowed)
49100667 hits, 7158 misses, 8925 trims, 8928 created
25 failures (0 no memory)
Big buffers, 1524 bytes (total 10, permanent 5, peak 34 @ 7w0d):
10 in free list (5 min, 10 max allowed)
19195022 hits, 5339542 misses, 2016176 trims, 2016181 created
3429258 failures (0 no memory)
VeryBig buffers, 4520 bytes (total 10, permanent 0, peak 14 @ 7w0d):
10 in free list (0 min, 10 max allowed)
3334320 hits, 1731912 misses, 85896 trims, 85906 created
1731910 failures (0 no memory)
Large buffers, 5024 bytes (total 5, permanent 0, peak 8 @ 7w0d):
5 in free list (0 min, 5 max allowed)
--More-- 430335 hits, 1301575 misses, 73322 trims, 73327 created
1301575 failures (0 no memory)
Huge buffers, 18024 bytes (total 2, permanent 0, peak 4 @ 7w0d):
2 in free list (0 min, 2 max allowed)
146906 hits, 1154669 misses, 67408 trims, 67410 created
1154669 failures (0 no memory)
Interface buffer pools:
Calhoun Packet Receive Pool buffers, 1560 bytes (total 512, permanent 512):
336 in free list (0 min, 512 max allowed)
1299462975 hits, 0 misses
Switch 1# show buffers failures
Caller Pool Size When
0x802D84C4 Big 710 00:21:04
0x802D84C4 Big 1498 00:21:02
0x802D84C4 Big 610 00:20:52
0x802D84C4 Big 610 00:20:52
0x802D84C4 Big 1498 00:18:56
0x802D84C4 Big 1498 00:18:56
0x802D84C4 Big 1498 00:18:53
0x802D84C4 Big 1498 00:18:53
0x802D84C4 Big 1498 00:16:55
0x802D84C4 Big 658 00:16:55
*****************************************************************************************************************************
Switch 2# show buffers
Buffer elements:
498 in free list (500 max allowed)
589527798 hits, 0 misses, 0 created
Public buffer pools:
Small buffers, 104 bytes (total 31, permanent 25, peak 181 @ 7w0d):
30 in free list (20 min, 60 max allowed)
531359757 hits, 4784 misses, 11658 trims, 11664 created
0 failures (0 no memory)
Middle buffers, 600 bytes (total 30, permanent 15, peak 63 @ 7w0d):
30 in free list (10 min, 30 max allowed)
36137453 hits, 1040 misses, 2659 trims, 2674 created
0 failures (0 no memory)
Big buffers, 1524 bytes (total 10, permanent 5, peak 33 @ 7w0d):
10 in free list (5 min, 10 max allowed)
14110487 hits, 1494898 misses, 629152 trims, 629157 created
933968 failures (0 no memory)
VeryBig buffers, 4520 bytes (total 10, permanent 0, peak 13 @ 7w0d):
10 in free list (0 min, 10 max allowed)
1852511 hits, 362391 misses, 34560 trims, 34570 created
362389 failures (0 no memory)
Large buffers, 5024 bytes (total 1, permanent 0, peak 7 @ 7w0d):
1 in free list (0 min, 5 max allowed)
--More-- 160403 hits, 201986 misses, 26861 trims, 26862 created
201986 failures (0 no memory)
Huge buffers, 18024 bytes (total 1, permanent 0, peak 4 @ 7w0d):
1 in free list (0 min, 2 max allowed)
48906 hits, 153080 misses, 22701 trims, 22702 created
153080 failures (0 no memory)
Interface buffer pools:
Calhoun Packet Receive Pool buffers, 1560 bytes (total 512, permanent 512):
334 in free list (0 min, 512 max allowed)
664800281 hits, 0 misses
Switch 2#show buffer failures
Caller Pool Size When
0x802D84C4 Big 610 16:33:54
0x802D84C4 Big 610 16:33:54
0x802D84C4 Big 610 16:33:54
0x802D84C4 Big 610 16:33:54
0x802D84C4 Big 610 16:33:54
0x802D84C4 Big 610 16:33:54
0x802D84C4 Big 610 16:33:54
0x802D84C4 Big 610 16:33:53
0x802D84C4 Big 610 16:33:53
0x802D84C4 Big 610 16:33:53
Regards,
Kishan
