Why connect tidb more and more slowly when app start？

[kylezhang]

Please answer these questions before submitting your issue. Thanks!

1. What did you do?
   Why connect tidb more and more slowly when app(nodejs/sequelizejs, sequel Pro) start, often there will be a timeout, the solution is to acquireConnectionTimeout increase.

2. What did you expect to see?

3. What did you see instead?

4. What version of TiDB are you using (tidb-server -V or run select tidb_version(); on TiDB)?

[shenli]

@kylezhang Thanks for your feedback! Please try the latest master or release 1.0.7. We just fixed a related issue in the last week.

[kylezhang]

@shenli Thanks, 1.0.7 can solve my problem?
And could you give me a commit id to solve this problem?

[shenli]

@kylezhang Please take a look at this PR: #5679
There is a benchmark result in this PR: #5677

[kolbe]

Hi @kylezhang, did you have a chance to re-test this scenario after upgrading? Did you see any improvement in performance?

[ghost]

I am going to close this issue as stale. Please feel free to re-open if you have additional questions. Thanks!