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