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checkpoint

Provides detailed information on per-vBucket checkpoint data structure.

Syntax

Request syntax:

cbstats host:11210 [common options] checkpoint

Description

This command provides detailed information on per-vBucket checkpoint data structure.

Requesting checkpoint stats impacts the performance and should not be used frequently.

The identifier for each vBucket statistic begins with the string vb_ followed by the vBucket ID and a colon.

Table 1. cbstats checkpoint values
Stat Description

cursor_name:cursor_checkpoint_id

Checkpoint ID at which the cursor cursor_name is pointing now.

cursor_name:cursor_seqno

The seqno at which the cursor cursor_name is pointing now.

cursor_name:num_visits

Number of times a batch of items have been drained from a checkpoint of cursor_name.

cursor_name:num_items_for_cursor

Number of items remaining for the cursor cursor_name.

open_checkpoint_id

ID of the current open checkpoint.

num_conn_cursors

Number of referencing DCP cursors.

num_checkpoint_items

Number of total items in a checkpoint data structure.

num_open_checkpoint_items

Number of items in the open checkpoint.

num_checkpoints

Number of checkpoints in a checkpoint data structure.

num_items_for_persistence

Number of items remaining for persistence.

state

The state of the vBucket for which this checkpoint contains data.

last_closed_checkpoint_id

The last closed checkpoint number.

persisted_checkpoint_id

The last persisted checkpoint number.

mem_usage

Total memory taken up by items in all checkpoints under given manager.

Options

There are no options for this command. For common cbstats options, see cbstats.

Example

Request

cbstats localhost:11210 -u Administrator -p password -b beer-sample checkpoint

Response:

 vb_0:last_closed_checkpoint_id:           4
 vb_0:mem_usage:                           121
 vb_0:num_checkpoint_items:                2
 vb_0:num_checkpoints:                     1
 vb_0:num_conn_cursors:                    1
 vb_0:num_items_for_persistence:           0
 vb_0:num_open_checkpoint_items:           0
 vb_0:open_checkpoint_id:                  5
 vb_0:persisted_checkpoint_id:             4
 vb_0:persistence:cursor_checkpoint_id:    5
 vb_0:persistence:cursor_seqno:            10
 vb_0:persistence:num_visits:              6
 vb_0:state:                               active
 ...
 vb_9:last_closed_checkpoint_id:           3
 vb_9:mem_usage:                           121
 vb_9:num_checkpoint_items:                2
 vb_9:num_checkpoints:                     1
 vb_9:num_conn_cursors:                    1
 vb_9:num_items_for_persistence:           0
 vb_9:num_open_checkpoint_items:           0
 vb_9:open_checkpoint_id:                  4
 vb_9:persisted_checkpoint_id:             3
 vb_9:persistence:cursor_checkpoint_id:    4
 vb_9:persistence:cursor_seqno:            6
 vb_9:persistence:num_visits:              6
 vb_9:state:                               active