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[OpenStack Infra <1977831@xxxxxxxxxxxxxxxxxx>]

Reviewed:  https://review.opendev.org/c/openstack/neutron/+/844959
Committed: https://opendev.org/openstack/neutron/commit/c25097b0b0da2af9021699036a69cd10e66533b1
Submitter: "Zuul (22348)"
Branch:    master

commit c25097b0b0da2af9021699036a69cd10e66533b1
Author: Fernando Royo <froyo@xxxxxxxxxx>
Date:   Tue Jun 7 13:51:51 2022 +0200

    Optimize queries for port operations
    
    Port create/update are most time-consuming operations
    on subnet creation. As example, in those cases where
    several subnets are created over the same network the
    response time for those port operations is linearly
    increased as the total subnets increases.
    
    This patch improves the number of queries required on port
    operations in order to reduce the response time.
    
    Closes-Bug: #1977831
    Change-Id: I0fccf36a2035e8f6c2fa8dab0307358da600c8f7


** Changed in: neutron
       Status: In Progress => Fix Released

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https://bugs.launchpad.net/bugs/1977831

Title:
  Response time increasing on new subnets over same network

Status in neutron:
  Fix Released

Bug description:
  After some subnets created over same network, response time for new
  ones is incresase linearly, if number of subnet is elevated (over
  1000) timeout is triggered.

  The issue can be easily reproduced by creating subnets in a loop and
  capture the time it takes to create as the total count increases.

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