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show-clockskew

show-clockskew#

Shows the status of clock skew between each BDR node pair.

Synopsis#

Shows the status of clock skew between each BDR node pair in the cluster.

Please note that the current implementation of clock skew may return an inaccurate skew value if the cluster is under high load while running this command or has large number of nodes in it.

Symbol

Meaning

*

ok

~

warning (skew > 2 seconds)

!

critical ( skew > 5 seconds)

x

down / unreachable

?

unknown

-

n/a

 
pgd show-clockskew [flags]

Options#

No specific command options. See Global Options for global options.

Examples#

Show clock skew with a node down#

In this example, there is a 3 node cluster, bdr-a1 and bdr-c1 are up, bdr-b1 is down.

$ pgd show-clockskew
__OUTPUT__
Node   bdr-a1 bdr-b1 bdr-c1 Current Time
- ---   ------ ------ ------ ------------
bdr-a1 *      ?      *      2022-03-30 07:02:21.334472
bdr-b1 x      *      x      x
bdr-c1 *      ?      *      2022-03-30 07:02:21.186809

Show clock skew with all nodes working correctly#

In this example, there is a 3 node cluster with all nodes are up and all clocks are in sync.

$ pgd show-clockskew
__OUTPUT__
Node   bdr-a1 bdr-b1 bdr-c1 Current Time
- ---   ------ ------ ------ ------------
bdr-a1 *      *      *      2022-03-30 07:04:54.147017
bdr-b1 *      *      *      2022-03-30 07:04:54.340543
bdr-c1 *      *      *      2022-03-30 07:04:53.90451
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