[DOCS-12784] Docs for SERVER-41287: Add count of instances when flow control is engaged Created: 07/Jun/19  Updated: 13/Nov/23  Resolved: 02/Aug/19

Status: Closed
Project: Documentation
Component/s: manual, Server
Affects Version/s: None
Fix Version/s: 4.3.1, 4.2.0-rc1, Server_Docs_20231030, Server_Docs_20231106, Server_Docs_20231105, Server_Docs_20231113

Type: Task Priority: Major - P3
Reporter: Kay Kim (Inactive) Assignee: Kay Kim (Inactive)
Resolution: Fixed Votes: 0
Labels: docs-4.2-flow-control, docs-4.2-replication
Remaining Estimate: Not Specified
Time Spent: Not Specified
Original Estimate: Not Specified

Issue Links:
Documented
documents SERVER-41287 Add count of instances when flow cont... Closed
Duplicate
Related
is related to DOCS-12630 Docs for SERVER-39848: Determine and ... Closed
is related to DOCS-12670 Document Flow Control feature Closed
Participants:
Days since reply: 4 years, 27 weeks, 5 days ago
Epic Link: DOCS: 4.2 Server/Tools

 Description   

Description

Description:

This ticket adds fields to serverStatus output.

Engineering Ticket Description:

It will be useful for identifying mongod instances where flow control has been engaged to have cumulative metrics about the number of times flow control has been engaged on a mongod instance since startup, and the cumulative time for which flow control has been engaged. For the purposes of this ticket, flow control being "engaged" means the isLagged metric is 1, i.e., the current majority committed lag is greater than some established threshold percentage of the configured target maximum lag. These new metrics would be based on the isLagged metric, so maybe these could be named

  • isLaggedCount - incremented every time isLagged goes from 0 to 1
  • isLaggedTimeMicros - incremented every time isLagged goes to 0 by the elapsed time since it last went to 1.

Scope of changes

Impact to Other Docs

MVP (Work and Date)

Resources (Scope or Design Docs, Invision, etc.)



 Comments   
Comment by Githook User [ 02/Aug/19 ]

Author:

{'name': 'Kay Kim', 'email': 'kay.kim@10gen.com', 'username': 'kay-kim'}

Message: DOCS-12670, DOCS-12630, DOCS-12784: Flow control
Branch: master
https://github.com/mongodb/docs/commit/f98659560e76699a43bb2e229a6e82723121152d

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