Delta Sync Statistics

Sync status: OK

Drops:

Lost updates................................. 0

Lost bulk update events...................... 0

Oversized updates not sent................... 0

Sync at risk:

Sent reject notifications.................... 0

Received reject notifications................ 0

Sent updates:

Total generated sync messages................ 12316

Sent retransmission requests................. 0

Sent retransmission updates.................. 0

Peak fragments per update.................... 1

Received updates:

Total received updates....................... 12

Received retransmission requests............. 0

Queue sizes (num of updates):

Sending queue size........................... 512

Receiving queue size......................... 256

Fragments queue size......................... 50

Timers:

Delta Sync interval (ms)..................... 100

Reset on Sun Jun 3 14:37:26 2018 (triggered by fullsync).

Lost updates

Shows how many Delta Sync updates this Cluster Member considers as lost (based on sequence numbers in CCP packets).

If this counter shows a value greater than 0, this Cluster Member lost Delta Sync updates.

Possible mitigation:

Increase the size of the Sending Queue and the size of the Receiving Queue:

• Increase the size of the Sending Queue, if the counter Received reject notification is increasing.
• Increase the size of the Receiving Queue, if the counter Received reject notification is not increasing.

Lost bulk update events

Shows how many times this Cluster Member missed Delta Sync updates.

(bulk update = twice the size of the local receiving queue)

This counter increases when this Cluster Member receives a Delta Sync update with a sequence number much greater than expected. This probably indicates some networking issues that cause massive packet drops.

This counter increases when the amount of missed Delta Sync updates is more than twice the local Receiving Queue Size.

Possible mitigation:

• If the counter's value is steady, this might indicate a one-time synchronization problem that can be resolved by running manual Full Sync. See sk37029.
• If the counter's value keeps increasing, probable there are some networking issues. Increase the sizes of both the Receiving Queue and Sending Queue.

Oversized updates not sent

Shows how many oversized Delta Sync updates were discarded before sending them.

This counter increases when Delta Sync update is larger than the local Fragments Queue Size.

Possible mitigation:

• If the counter's value is steady, increase the size of the Sending Queue.
• If the counter's value keeps increasing, contact Check Point Support.

Sent reject notifications

Shows how many times this Cluster Member rejected Delta Sync retransmission requests from its peer Cluster Members, because this Cluster Member does not hold the requested Delta Sync update anymore.

Received reject notification

Shows how many reject notifications this Cluster Member received from its peer Cluster Members.

Total generated sync messages

Shows how many Delta Sync updates were generated. This counts the Delta Sync updates, Retransmission Requests, Retransmission Acknowledgments, and so on).

Sent retransmission requests

Shows how many times this Cluster Member asked its peer Cluster Members to retransmit specific Delta Sync update(s).

Retransmission requests are sent when certain Delta Sync updates (with a specified sequence number) are missing, while the sending Cluster Member already received Delta Sync updates with advanced sequences.

Note - Compare the number of Sent retransmission requests to the Total generated sync messages of the other Cluster Members.

A large counter's value can imply connectivity problems. If the counter's value is unreasonably high (more than 30% of the Total generated sync messages of other Cluster Members), contact Check Point Support equipped with the entire output and a detailed description of the network topology and configuration.

Sent retransmission updates

Shows how many times this Cluster Member retransmitted specific Delta Sync update(s) at the requests from its peer Cluster Members.

Peak fragments per update

Shows the peak amount of fragments in the Fragments Queue on this Cluster Member (usually, should be 1).

Total received updates

Shows the total number of Delta Sync updates this Cluster Member received from its peer Cluster Members.

This counts only Delta Sync updates (not Retransmission Requests, Retransmission Acknowledgments, and others).

Received retransmission requests

Shows how many retransmission requests this Cluster Member received from its peer Cluster Members.

A large counter's value can imply connectivity problems. If the counter's value is unreasonably high (more than 30% of the Total generated sync messages on this Cluster Member), contact Check Point Support equipped with the entire output and a detailed description of the network topology and configuration.

Sending queue size

Shows the size of the cyclic queue, which buffers all the Delta Sync updates that were already sent until it receives an acknowledgment from the peer Cluster Members.

This queue is needed for retransmitting the requested Delta Sync updates.

Each Cluster Member has one Sending Queue.

Default: 512 Delta Sync updates, which is also the minimal value.

Receiving queue size

Shows the size of the cyclic queue, which buffers the received Delta Sync updates in two cases:

• When Delta Sync updates are missing, this queue is used to hold the remaining received Delta Sync updates until the lost Delta Sync updates are retransmitted (Cluster Members must keep the order, in which they save the Delta Sync updates in the kernel tables).
• This queue is used to re-assemble a fragmented Delta Sync update.

Each Cluster Member has one Receiving Queue.

Default: 256 Delta Sync updates, which is also the minimal value.

Fragments queue size

Shows the size of the queue, which is used to prepare a Delta Sync update before moving it to the Sending Queue.

Notes:

• This queue must be smaller than the Sending Queue.
• This queue must be significantly smaller than the Receiving Queue.

Default: 50 Delta Sync updates, which is also the minimal value.

Delta Sync interval (ms)

Shows the interval at which this Cluster Member sends the Delta Sync updates from its Sending Queue.

The base time unit is 100ms (or 1 tick).

Default: 100 ms, which is also the minimum value.

See Increasing the Sync Timer.