Using
memcached
1356
• Protocol and socket errors, including exhausting available connections
• Each registered client connection, including the socket descriptor number and the protocol used.
For example:
32: Client using the ascii protocol
33: Client using the ascii protocol
Note that the socket descriptor is only valid while the client remains connected. Non-persistent
connections may not be effectively represented.
Examples of the error messages output at this level include:
<%d send buffer was %d, now %d
Can't listen for events on fd %d
Can't read from libevent pipe
Catastrophic: event fd doesn't match conn fd!
Couldn't build response
Couldn't realloc input buffer
Couldn't update event
Failed to build UDP headers
Failed to read, and not due to blocking
Too many open connections
Unexpected state %d
• Output when using
-vv
When using the second level of verbosity, you get more detailed information about protocol
operations, keys updated, chunk and network operatings and details.
During the initial start-up of
memcached
with this level of verbosity, you are shown the sizes of the
individual slab classes, the chunk sizes, and the number of entries per slab. These do not show the
allocation of the slabs, just the slabs that would be created when data is added. You are also given
information about the listen queues and buffers used to send information. A sample of the output
generated for a TCP/IP based system with the default memory and growth factors is given below:
shell> memcached -vv
slab class 1: chunk size 80 perslab 13107
slab class 2: chunk size 104 perslab 10082
slab class 3: chunk size 136 perslab 7710
slab class 4: chunk size 176 perslab 5957
slab class 5: chunk size 224 perslab 4681
slab class 6: chunk size 280 perslab 3744
slab class 7: chunk size 352 perslab 2978
slab class 8: chunk size 440 perslab 2383
slab class 9: chunk size 552 perslab 1899
slab class 10: chunk size 696 perslab 1506
slab class 11: chunk size 872 perslab 1202
slab class 12: chunk size 1096 perslab 956
slab class 13: chunk size 1376 perslab 762
slab class 14: chunk size 1720 perslab 609
slab class 15: chunk size 2152 perslab 487
slab class 16: chunk size 2696 perslab 388
slab class 17: chunk size 3376 perslab 310
slab class 18: chunk size 4224 perslab 248
slab class 19: chunk size 5280 perslab 198
slab class 20: chunk size 6600 perslab 158
slab class 21: chunk size 8256 perslab 127
slab class 22: chunk size 10320 perslab 101
slab class 23: chunk size 12904 perslab 81
slab class 24: chunk size 16136 perslab 64
slab class 25: chunk size 20176 perslab 51
slab class 26: chunk size 25224 perslab 41
slab class 27: chunk size 31536 perslab 33
slab class 28: chunk size 39424 perslab 26
slab class 29: chunk size 49280 perslab 21
slab class 30: chunk size 61600 perslab 17
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