cbstats tool

cbstats tool

The cbstats tool is used to get node and cluster-level statistics about performance and items in storage.

Description

The cbstats tool is a per-node, per-bucket operation. That means that the IP address of a node in the cluster and a named bucket must be specified. If a named bucket is not provided, the server applies the setting to any default bucket that exists at the specified node. To perform this operation for an entire cluster, perform the command for every node/bucket combination that exists for that cluster.

The tool is found in the following locations:

Platform Location
Linux /opt/couchbase/bin/cbstats
Windows C:\Program Files\Couchbase\Server\bin\cbstats.exe
Mac OS X /Applications/Couchbase Server.app/Contents/Resources/couchbase-core/bin/cbstats

CLI command and parameters

This tool is used to get the couchbase node statistics. The general format for this command is:


cbstats [host]:11210 [command] -b [bucket-name] -p [bucket-password]
			

The following are commands. The all and timings commands are used to understand cluster or node performance. The majority of these commands are predominately used by Couchbase internally and to help resolve customer support incidents.

all
allocator
checkpoint [vbid]
config
dcp
dcp-takeover vb name
dcpagg
diskinfo [detail]
dispatcher [logs]
failovers [vbid]
hash [detail]
items (memcached bucket only)
key keyname vbid
kvstore
kvtimings
memory
prev-vbucket
raw argument
reset
runtimes
scheduler
slabs (memcached bucket only)
tap [username password]
tap-takeover vb name
tapagg
timings
vbucket
vbucket-detail [vbid]
vbucket-seqno [vbid]
vkey keyname vbid
warmup
workload

The following are command options:

Options Description
-h, --help Shows the help message and exits.
-b [bucket-name] The bucket to get the status from. Default: default
-p [password] The password for the bucket, if one exists.

Syntax

Request syntax:


cbstats [host]:11210 [command]
			

Example: Timings

To get statistics, for example, timings on host 10.5.2.117:

cbstats 10.5.2.117:11210 timings

Response:


 disk_commit (1024 total)
    0 - 1s : (100.00%) 1024 ###################################################
    Avg    : (     1s)
 get_stats_cmd (30663276 total)
    0 - 1us       : (  0.05%)    14827 
    1us - 2us     : (  6.56%)  1995778 ##
    2us - 4us     : ( 41.79%) 10804626 ##############
    4us - 8us     : ( 45.20%)  1044043 #
    8us - 16us    : ( 45.49%)    89929 
    16us - 32us   : ( 45.90%)   124472 
    32us - 64us   : ( 46.38%)   148935 
    64us - 128us  : ( 56.17%)  2999690 ###
    128us - 256us : ( 68.57%)  3804009 ####
    256us - 512us : ( 69.91%)   411281 
    512us - 1ms   : ( 78.77%)  2717402 ###
    1ms - 2ms     : ( 96.36%)  5391526 #######
    2ms - 4ms     : ( 99.05%)   826345 #
    4ms - 8ms     : ( 99.96%)   278727 
    8ms - 16ms    : (100.00%)    11443 
    16ms - 32ms   : (100.00%)      217 
    32ms - 65ms   : (100.00%)       19 
    65ms - 131ms  : (100.00%)        7 
    Avg           : (  347us)
 disk_vbstate_snapshot (93280 total)
    32us - 64us   : ( 15.34%) 14308 ######
    64us - 128us  : ( 74.74%) 55413 #########################
    128us - 256us : ( 91.39%) 15532 #######
    256us - 512us : ( 95.69%)  4007 #
    512us - 1ms   : ( 99.49%)  3546 #
    1ms - 2ms     : ( 99.95%)   423 
    2ms - 4ms     : ( 99.99%)    43 
    4ms - 8ms     : (100.00%)     4 
    2s - 4s       : (100.00%)     4 
    Avg           : (  190us)
 notify_io (4 total)
    4us - 8us   : ( 25.00%) 1 ############
    16us - 32us : ( 75.00%) 2 ########################
    32us - 64us : (100.00%) 1 ############
    Avg         : (   17us)
			

Example: Using with other CLI tools

The cbstats output can be used with other command-line tools to sort and filter the data, for example, the watch command.

watch --diff "cbstats \
    ip-10-12-19-81:11210 -b bucket_name -p bucket_password all | egrep 'item|mem|flusher|ep_queue|bg|eje|resi|warm'"