http2: fix excessive CPU usage when using allowHTTP1=true
#52713
Conversation
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
When Http2SecureServer is configured with `allowHTTP1=true`, it calls `setupConnectionsTracking` to start monitoring for idle HTTP1 connections. `setupConnectionsTracking` expects to have `this.connectionsCheckingInterval` property defined, but it does not exist on `Http2SecureServer`. This `undefined` value is passed to `setInterval`, which results in `checkConnections` being called on every tick, creating significant additional load on the server CPU. The fix is to define `this.connectionsCheckingInterval` on the Http2SecureServer instance. Refs: nodejs#51569
|
Review requested:
|
nodejs-github-bot
added
http2
anonrig
added
author ready
github-actions
bot
removed
the
request-ci
ShogunPanda
approved these changes
Apr 27, 2024
marco-ippolito
approved these changes
Apr 27, 2024
lpinca
approved these changes
Apr 27, 2024
anonrig
added
the
commit-queue
RafaelGSS
approved these changes
Apr 28, 2024
MoLow
approved these changes
Apr 28, 2024
mcollina
added
commit-queue
nodejs-github-bot
removed
the
commit-queue
|
Landed in 2bdd670 |
aduh95
pushed a commit
that referenced
this pull request
Apr 29, 2024
When Http2SecureServer is configured with `allowHTTP1=true`, it calls `setupConnectionsTracking` to start monitoring for idle HTTP1 connections. `setupConnectionsTracking` expects to have `this.connectionsCheckingInterval` property defined, but it does not exist on `Http2SecureServer`. This `undefined` value is passed to `setInterval`, which results in `checkConnections` being called on every tick, creating significant additional load on the server CPU. The fix is to define `this.connectionsCheckingInterval` on the Http2SecureServer instance. Refs: #51569 PR-URL: #52713 Reviewed-By: Yagiz Nizipli <[email protected]> Reviewed-By: Paolo Insogna <[email protected]> Reviewed-By: Matteo Collina <[email protected]> Reviewed-By: Marco Ippolito <[email protected]> Reviewed-By: Luigi Pinca <[email protected]> Reviewed-By: Rafael Gonzaga <[email protected]> Reviewed-By: Moshe Atlow <[email protected]>
marco-ippolito
pushed a commit
that referenced
this pull request
May 2, 2024
When Http2SecureServer is configured with `allowHTTP1=true`, it calls `setupConnectionsTracking` to start monitoring for idle HTTP1 connections. `setupConnectionsTracking` expects to have `this.connectionsCheckingInterval` property defined, but it does not exist on `Http2SecureServer`. This `undefined` value is passed to `setInterval`, which results in `checkConnections` being called on every tick, creating significant additional load on the server CPU. The fix is to define `this.connectionsCheckingInterval` on the Http2SecureServer instance. Refs: #51569 PR-URL: #52713 Reviewed-By: Yagiz Nizipli <[email protected]> Reviewed-By: Paolo Insogna <[email protected]> Reviewed-By: Matteo Collina <[email protected]> Reviewed-By: Marco Ippolito <[email protected]> Reviewed-By: Luigi Pinca <[email protected]> Reviewed-By: Rafael Gonzaga <[email protected]> Reviewed-By: Moshe Atlow <[email protected]>
Merged
marco-ippolito
pushed a commit
that referenced
this pull request
May 3, 2024
When Http2SecureServer is configured with `allowHTTP1=true`, it calls `setupConnectionsTracking` to start monitoring for idle HTTP1 connections. `setupConnectionsTracking` expects to have `this.connectionsCheckingInterval` property defined, but it does not exist on `Http2SecureServer`. This `undefined` value is passed to `setInterval`, which results in `checkConnections` being called on every tick, creating significant additional load on the server CPU. The fix is to define `this.connectionsCheckingInterval` on the Http2SecureServer instance. Refs: #51569 PR-URL: #52713 Reviewed-By: Yagiz Nizipli <[email protected]> Reviewed-By: Paolo Insogna <[email protected]> Reviewed-By: Matteo Collina <[email protected]> Reviewed-By: Marco Ippolito <[email protected]> Reviewed-By: Luigi Pinca <[email protected]> Reviewed-By: Rafael Gonzaga <[email protected]> Reviewed-By: Moshe Atlow <[email protected]>
EliphazBouye
pushed a commit
to EliphazBouye/node
that referenced
this pull request
Jun 20, 2024
When Http2SecureServer is configured with `allowHTTP1=true`, it calls `setupConnectionsTracking` to start monitoring for idle HTTP1 connections. `setupConnectionsTracking` expects to have `this.connectionsCheckingInterval` property defined, but it does not exist on `Http2SecureServer`. This `undefined` value is passed to `setInterval`, which results in `checkConnections` being called on every tick, creating significant additional load on the server CPU. The fix is to define `this.connectionsCheckingInterval` on the Http2SecureServer instance. Refs: nodejs#51569 PR-URL: nodejs#52713 Reviewed-By: Yagiz Nizipli <[email protected]> Reviewed-By: Paolo Insogna <[email protected]> Reviewed-By: Matteo Collina <[email protected]> Reviewed-By: Marco Ippolito <[email protected]> Reviewed-By: Luigi Pinca <[email protected]> Reviewed-By: Rafael Gonzaga <[email protected]> Reviewed-By: Moshe Atlow <[email protected]>
bmeck
pushed a commit
to bmeck/node
that referenced
this pull request
Jun 22, 2024
When Http2SecureServer is configured with `allowHTTP1=true`, it calls `setupConnectionsTracking` to start monitoring for idle HTTP1 connections. `setupConnectionsTracking` expects to have `this.connectionsCheckingInterval` property defined, but it does not exist on `Http2SecureServer`. This `undefined` value is passed to `setInterval`, which results in `checkConnections` being called on every tick, creating significant additional load on the server CPU. The fix is to define `this.connectionsCheckingInterval` on the Http2SecureServer instance. Refs: nodejs#51569 PR-URL: nodejs#52713 Reviewed-By: Yagiz Nizipli <[email protected]> Reviewed-By: Paolo Insogna <[email protected]> Reviewed-By: Matteo Collina <[email protected]> Reviewed-By: Marco Ippolito <[email protected]> Reviewed-By: Luigi Pinca <[email protected]> Reviewed-By: Rafael Gonzaga <[email protected]> Reviewed-By: Moshe Atlow <[email protected]>
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment
Add this suggestion to a batch that can be applied as a single commit.
This suggestion is invalid because no changes were made to the code.
Suggestions cannot be applied while the pull request is closed.
Suggestions cannot be applied while viewing a subset of changes.
Only one suggestion per line can be applied in a batch.
Add this suggestion to a batch that can be applied as a single commit.
Applying suggestions on deleted lines is not supported.
You must change the existing code in this line in order to create a valid suggestion.
Outdated suggestions cannot be applied.
This suggestion has been applied or marked resolved.
Suggestions cannot be applied from pending reviews.
Suggestions cannot be applied on multi-line comments.
Suggestions cannot be applied while the pull request is queued to merge.
Suggestion cannot be applied right now. Please check back later.
In Node
v20.12a new feature was added for HTTP2 servers to close idle connections when allowHTTP1 is true. The implementation mirrors HTTP1 server behavior and leans on setupConnectionsTracking.setupConnectionsTrackingworks by callingsetIntervalusing thethis.connectionsCheckingIntervalvalue which does not exist onHttp2SecureServer. Therefore,undefinedis passed tosetInterval, which leads tocheckConnectionsbeing called on every tick. This creates a significant additional load on the server CPU. The fix is to definethis.connectionsCheckingIntervalon the Http2SecureServer instance.We run 10-20 app instances per server, and our CPU usage increased by ~20% when upgrading from
v20.11.1tov20.12.0due to this issue.Refs: #51569