Show buffers Command

The show buffers command displays information (statistics) on buffer elements, public buffer pools, and interface buffer pools. Buffer elements are small data structures that are used for internal operating system queues or when a buffer must be associated with more than one queue. The public buffer pools are presented in the second section of the show buffers output and each buffer size (small, middle, and so on) is presented with its own statistics. The last section of the show buffers command output displays the buffer statistics for each of the router's interfaces. Example 4-8 presents a sample output (partial) from the show buffers exec command.

Example 4-8 A Sample Output of the show buffers Exec Command

A_StubR#show buffers Buffer elements:

500 in free list (500 max allowed) 3846 hits, 0 misses, 0 created

Public buffer pools:

Small buffers, 104 bytes (total 50, permanent 50): 49 in free list (20 min, 150 max allowed) 1440 hits, 0 misses, 0 trims, 0 created 0 failures (0 no memory) Middle buffers, 600 bytes (total 25, permanent 25): 25 in free list (10 min, 150 max allowed) 703 hits, 0 misses, 0 trims, 0 created 0 failures (0 no memory) Big buffers, 1524 bytes (total 50, permanent 50):

Example 4-8 A Sample Output of the show buffers Exec Command (Continued)

50 in free list (5 min, 150 max allowed)

150 hits, 0 misses, 0 trims, 0 created

0 failures (0 no memory)

VeryBig buffers, 4520 bytes (total 10, permanent 10):

10 in free list (0 min, 100 max allowed)

0 hits, 0 misses, 0 trims, 0 created

0 failures (0 no memory)

Large buffers, 5024 bytes (total 0, permanent

0):

0 in free list (0 min, 10 max allowed)

0 hits, 0 misses, 0 trims, 0 created

0 failures (0 no memory)

Huge buffers, 18024 bytes (total 0, permanent

0):

0 in free list (0 min, 4 max allowed)

0 hits, 0 misses, 0 trims, 0 created

0 failures (0 no memory)

Interface buffer pools:

Ethernet0 buffers, 1524 bytes (total 32, permanent 32):

8 in free list (0 min, 32 max allowed)

24 hits, 0 fallbacks

8 max cache size, 8 in cache

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