Public bug reported:
SRU Justification
[Impact]
TCP pingpong threshold is 1 by default. But some applications, like SQL DB
may prefer a higher pingpong threshold to activate delayed acks in quick
ack mode for better performance.
There is no single value that fits all applications.
Add net.ipv4.tcp_pingpong_thresh sysctl tunable, so it can be tuned for
optimal performance based on the application needs.
[Test Case]
Microsoft tested
[Regression Potential]
Should be zero since default behavior is unchanged.
[Other Info]
SF: #00357415
** Affects: linux-azure (Ubuntu)
Importance: Undecided
Status: Fix Released
** Affects: linux-azure (Ubuntu Jammy)
Importance: Medium
Assignee: Tim Gardner (timg-tpi)
Status: In Progress
** Affects: linux-azure (Ubuntu Lunar)
Importance: Medium
Assignee: Tim Gardner (timg-tpi)
Status: In Progress
** Affects: linux-azure (Ubuntu Mantic)
Importance: Medium
Assignee: Tim Gardner (timg-tpi)
Status: In Progress
** Also affects: linux (Ubuntu Lunar)
Importance: Undecided
Status: New
** Also affects: linux (Ubuntu Jammy)
Importance: Undecided
Status: New
** Also affects: linux (Ubuntu Mantic)
Importance: Undecided
Status: New
** Changed in: linux (Ubuntu)
Status: New => Fix Released
** Package changed: linux (Ubuntu) => linux-azure (Ubuntu)
** Changed in: linux-azure (Ubuntu Jammy)
Importance: Undecided => Medium
** Changed in: linux-azure (Ubuntu Jammy)
Status: New => In Progress
** Changed in: linux-azure (Ubuntu Jammy)
Assignee: (unassigned) => Tim Gardner (timg-tpi)
** Changed in: linux-azure (Ubuntu Lunar)
Importance: Undecided => Medium
** Changed in: linux-azure (Ubuntu Lunar)
Status: New => In Progress
** Changed in: linux-azure (Ubuntu Lunar)
Assignee: (unassigned) => Tim Gardner (timg-tpi)
** Changed in: linux-azure (Ubuntu Mantic)
Importance: Undecided => Medium
** Changed in: linux-azure (Ubuntu Mantic)
Status: New => In Progress
** Changed in: linux-azure (Ubuntu Mantic)
Assignee: (unassigned) => Tim Gardner (timg-tpi)
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https://bugs.launchpad.net/bugs/2040300
Title:
Azure: Improve SQL DB latency
Status in linux-azure package in Ubuntu:
Fix Released
Status in linux-azure source package in Jammy:
In Progress
Status in linux-azure source package in Lunar:
In Progress
Status in linux-azure source package in Mantic:
In Progress
Bug description:
SRU Justification
[Impact]
TCP pingpong threshold is 1 by default. But some applications, like SQL DB
may prefer a higher pingpong threshold to activate delayed acks in quick
ack mode for better performance.
There is no single value that fits all applications.
Add net.ipv4.tcp_pingpong_thresh sysctl tunable, so it can be tuned for
optimal performance based on the application needs.
[Test Case]
Microsoft tested
[Regression Potential]
Should be zero since default behavior is unchanged.
[Other Info]
SF: #00357415
To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/linux-azure/+bug/2040300/+subscriptions
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