Tune batcher EC2 Describe* delays #2029
Merged
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
k8s-ci-robot
added
the
cncf-cla: yes
k8s-ci-robot
added
the
size/S
Code Coverage DiffThis PR does not change the code coverage |
AndrewSirenko
force-pushed
the
tuneBatch2
branch
4 times, most recently
from
1bc125b to
458701d
Compare
AndrewSirenko
changed the title
k8s-ci-robot
added
do-not-merge/work-in-progress
k8s-ci-robot
added
size/S
AndrewSirenko
changed the title
k8s-ci-robot
removed
the
do-not-merge/work-in-progress
k8s-ci-robot
added
the
lgtm
|
/approve |
|
[APPROVALNOTIFIER] This PR is APPROVED This pull-request has been approved by: ConnorJC3 The full list of commands accepted by this bot can be found here. The pull request process is described here
Needs approval from an approver in each of these files:
Approvers can indicate their approval by writing |
k8s-ci-robot
added
the
approved
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Outdated suggestions cannot be applied.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.
Is this a bug fix or adding new feature?
Improvement
What is this PR about? / Why do we need it?
Given that no throttling is observed for DescribeVolumes with 7k volume scalability tests, we reduced the current 1 second max batch delay to 500ms, and set that as the standard batcher delay.
This PR makes sure each RPC takes ~0.25s of batch latency per EC2 Describe call on average (and worst case extra delay of 0.5s).
This PR also makes sure each batcher will execute twice per second. In the rare case that each batcher is executing at once, the combined 12 requests per second is under the default EC2 Non-Mutating Action Bucket Refill Rate of 20.
What testing is done?
Scalability tests with batcher delays of 1, 0.5, 0.3, and 0.2 seconds for DescribeVolumes and DescribeInstances.
Final 5000 pod scalability test on default limits account.