12-03-2007 06:58 AM - edited 03-05-2019 07:47 PM
Does anyone have a link or reference for tweaking buffers? I have a 3825 that is serving as my internet gateway and looking into what seems to be a growing sluggisness on the internet I discovered the following. It seems that there is an excessive amount of misses but want to make sure that I do not overbalance memory or starve other processes.
suggestions / recommendation ??
Buffer elements:
1117 in free list (500 max allowed)
86962944 hits, 0 misses, 1119 created
Public buffer pools:
Small buffers, 104 bytes (total 126, permanent 50, peak 145 @ 7w0d):
95 in free list (20 min, 150 max allowed)
31481036 hits, 30288 misses, 30010 trims, 30086 created
3521 failures (0 no memory)
Middle buffers, 600 bytes (total 88, permanent 25, peak 119 @ 7w0d):
80 in free list (10 min, 150 max allowed)
6580495 hits, 108121 misses, 10580 trims, 10643 created
28939 failures (0 no memory)
Big buffers, 1536 bytes (total 50, permanent 50, peak 172 @ 7w0d):
50 in free list (5 min, 150 max allowed)
16519559 hits, 1433 misses, 829 trims, 829 created
376 failures (0 no memory)
VeryBig buffers, 4520 bytes (total 10, permanent 10, peak 12 @ 7w0d):
10 in free list (0 min, 100 max allowed)
249237 hits, 51 misses, 6 trims, 6 created
51 failures (0 no memory)
Large buffers, 5024 bytes (total 1, permanent 0, peak 2 @ 7w0d):
1 in free list (0 min, 10 max allowed)
5 hits, 46 misses, 854 trims, 855 created
46 failures (0 no memory)
Huge buffers, 18024 bytes (total 1, permanent 0, peak 2 @ 7w0d):
1 in free list (0 min, 4 max allowed)
2 hits, 44 misses, 854 trims, 855 created
44 failures (0 no memory)
Interface buffer pools:
CD2430 I/O buffers, 1536 bytes (total 0, permanent 0):
0 in free list (0 min, 0 max allowed)
0 hits, 0 fallbacks
IPC buffers, 4096 bytes (total 2, permanent 2):
2 in free list (1 min, 8 max allowed)
0 hits, 0 fallbacks, 0 trims, 0 created
0 failures (0 no memory)
Header pools:
Header buffers, 0 bytes (total 768, permanent 768):
256 in free list (128 min, 1024 max allowed)
512 hits, 0 misses, 0 trims, 0 created
0 failures (0 no memory)
512 max cache size, 512 in cache
99858 hits in cache, 0 misses in cache
Particle Clones:
1024 clones, 0 hits, 0 misses
Public particle pools:
F/S buffers, 256 bytes (total 768, permanent 768):
256 in free list (128 min, 1024 max allowed)
512 hits, 0 misses, 0 trims, 0 created
0 failures (0 no memory)
512 max cache size, 512 in cache
0 hits in cache, 0 misses in cache
CRYPTO_HW buffers, 1548 bytes (total 1536, permanent 1536):
0 in free list (0 min, 1536 max allowed)
1536 hits, 0 misses
1536 max cache size, 1024 in cache
512 hits in cache, 0 misses in cache
Normal buffers, 1676 bytes (total 3840, permanent 3840):
3840 in free list (128 min, 4096 max allowed)
0 hits, 0 misses, 0 trims, 0 created
0 failures (0 no memory)
12-03-2007 08:46 AM
Have a look at this link. thoug hit does not talk about 3825, it shoudl give an idea
http://www.cisco.com/warp/public/63/buffertuning.html
Also it is advisable to speak to TAC before doing any chnages to the buffer
HTH
Narayan
12-03-2007 10:35 AM
I concur, don't F* with the buffers unless you have a really good reason to do so and really know what you're doing - and the impact of this. TAC is the way to go - 100%.
-brad
(please rate the post!)
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