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Enable TCP_NODELAY flag #1751

Merged
merged 1 commit into from
Dec 21, 2022
Merged

Enable TCP_NODELAY flag #1751

merged 1 commit into from
Dec 21, 2022

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dsech
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@dsech dsech commented Dec 19, 2022

This fixes the massive slowness I experienced on some machines (Amazon Linux 2 on AWS EC2), where each query was taking ~60ms. Running a script that executes 100 UPDATE queries in sequence takes ~6.5s before patch, and 0.3s after patch.

And somewhat less interestingly.. the setting doesn't make much difference if I execute the script on my local PC. I'm guessing there are settings at the OS level that can amplify this slowness.

I don't know much about the TCP_NODELAY flag, only that it should always be set for time sensitive network communications (like for a MySQL client). And forgetting to set this flag seems to be a common issue, for example this blog post has a nice explanation: https://vorner.github.io/2020/11/06/40-ms-bug.html

@sidorares
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small note - the stream can be any duplex Stream instance, so might worth adding a check if setNoDelay method exist on it ( and maybe earlier - same check for setKeepAlive )

@dsech
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dsech commented Dec 20, 2022

setNoDelay and setKeepAlive are called in the same code block where this.stream is a TCP socket created by Net.socket(port, host), so the methods should always exist here.

But I'm more than happy to make any changes needed to the PR, just let me know.

@sidorares sidorares merged commit 016900f into sidorares:master Dec 21, 2022
@dsech dsech deleted the tcp-nodelay branch December 23, 2022 12:20
daniellockyer added a commit to TryGhost/Ghost that referenced this pull request Jan 12, 2023
@daniellockyer
🐛 Fixed ECONNRESET error when connecting to Azure MySQL DB
9b38bd9 
fixes #14990

- there was a bug in `mysql2` [1] when connecting to Azure DBs, but this was
  subsequently fixed, so this commit bumps the package in Ghost and
  `knex-migrator`, where this was also bumped
- of note, this release includes sidorares/node-mysql2#1666 and
  sidorares/node-mysql2#1751, which are very interesting

[1]: sidorares/node-mysql2#1438
Vylpes pushed a commit to Vylpes/Droplet that referenced this pull request Sep 14, 2023
@Vylpes
Update dependency mysql2 to v3 (#128)
8423dbf 
This PR contains the following updates:

| Package | Type | Update | Change |
|---|---|---|---|
| [mysql2](https://github.com/sidorares/node-mysql2) | dependencies | major | [`^2.2.5` -> `^3.0.0`](https://renovatebot.com/diffs/npm/mysql2/2.2.5/3.2.4) |

---

### Release Notes

<details>
<summary>sidorares/node-mysql2</summary>

### [`v3.2.4`](https://github.com/sidorares/node-mysql2/blob/HEAD/Changelog.md#&#8203;324-httpsgithubcomsidoraresnode-mysql2comparev323v324-2023-04-25)

[Compare Source](sidorares/node-mysql2@v3.2.3...v3.2.4)

##### Bug Fixes

-   **server:** Added missing encoding argument to server-handshake ([#&#8203;1976](sidorares/node-mysql2#1976)) ([a4b6b22](sidorares/node-mysql2@a4b6b22))

### [`v3.2.3`](https://github.com/sidorares/node-mysql2/blob/HEAD/Changelog.md#&#8203;323-httpsgithubcomsidoraresnode-mysql2comparev322v323-2023-04-16)

[Compare Source](sidorares/node-mysql2@v3.2.2...v3.2.3)

##### Bug Fixes

-   **types:** add decimalNumbers to createConnection/createPool typings. fixes [#&#8203;1803](sidorares/node-mysql2#1803) ([#&#8203;1817](sidorares/node-mysql2#1817)) ([bb48462](sidorares/node-mysql2@bb48462))

### [`v3.2.2`](https://github.com/sidorares/node-mysql2/blob/HEAD/Changelog.md#&#8203;322-httpsgithubcomsidoraresnode-mysql2comparev321v322-2023-04-16)

[Compare Source](sidorares/node-mysql2@v3.2.1...v3.2.2)

##### Bug Fixes

-   `ConnectionOptions` conflict between `mysql` and `mysql/promise` ([#&#8203;1955](sidorares/node-mysql2#1955)) ([eca8bda](sidorares/node-mysql2@eca8bda))

### [`v3.2.1`](https://github.com/sidorares/node-mysql2/blob/HEAD/Changelog.md#&#8203;321-httpsgithubcomsidoraresnode-mysql2comparev320v321-2023-04-13)

[Compare Source](sidorares/node-mysql2@v3.2.0...v3.2.1)

##### Bug Fixes

-   Add typings for Connection.promise(). ([#&#8203;1949](sidorares/node-mysql2#1949)) ([e3ca310](sidorares/node-mysql2@e3ca310))
-   PoolConnection redundancy when extending Connection interface in TypeScript ([7c62d11](sidorares/node-mysql2@7c62d11))

### [`v3.2.0`](https://github.com/sidorares/node-mysql2/blob/HEAD/Changelog.md#&#8203;320-httpsgithubcomsidoraresnode-mysql2comparev312v320-2023-03-03)

[Compare Source](sidorares/node-mysql2@v3.1.2...v3.2.0)

##### Features

-   maxVersion ssl option to tls.createSecureContext ([0c40ef9](sidorares/node-mysql2@0c40ef9))

### [`v3.1.2`](https://github.com/sidorares/node-mysql2/blob/HEAD/Changelog.md#&#8203;312-httpsgithubcomsidoraresnode-mysql2comparev311v312-2023-02-08)

[Compare Source](sidorares/node-mysql2@v3.1.1...v3.1.2)

##### Bug Fixes

-   update `lru-cache` reset method to clear ([114f266](sidorares/node-mysql2@114f266))

### [`v3.1.1`](https://github.com/sidorares/node-mysql2/blob/HEAD/Changelog.md#&#8203;311-httpsgithubcomsidoraresnode-mysql2comparev310v311-2023-02-07)

[Compare Source](sidorares/node-mysql2@v3.1.0...v3.1.1)

##### Bug Fixes

-   remove accidental log in caching_sha2\_password.js ([c1202b6](sidorares/node-mysql2@c1202b6))

### [`v3.1.0`](https://github.com/sidorares/node-mysql2/blob/HEAD/Changelog.md#&#8203;310-httpsgithubcomsidoraresnode-mysql2comparev301v310-2023-01-30)

[Compare Source](sidorares/node-mysql2@v3.0.1...v3.1.0)

##### Features

-   cleanup buffer/string conversions in hashing/xor helpers that were failing in Bun ([a2392e2](sidorares/node-mysql2@a2392e2))

##### Bug Fixes

-   when port is pased as a string convert it to a number (Bun's net.connect does not automatically convert this) ([703ecb2](sidorares/node-mysql2@703ecb2))

### [`v3.0.1`](https://github.com/sidorares/node-mysql2/blob/HEAD/Changelog.md#&#8203;301-httpsgithubcomsidoraresnode-mysql2comparev300v301-2023-01-13)

[Compare Source](sidorares/node-mysql2@v3.0.0...v3.0.1)

##### Miscellaneous Chores

-   release 3.0.1 ([d5a6b2c](sidorares/node-mysql2@d5a6b2c))

### [`v3.0.0`](https://github.com/sidorares/node-mysql2/blob/HEAD/Changelog.md#&#8203;300-httpsgithubcomsidoraresnode-mysql2comparev300-rc1v300-2023-01-12)

[Compare Source](sidorares/node-mysql2@v2.3.3...v3.0.0)

-   named-placeholders library is updated to use newer `lru-cache` dependency, allowing it do dedupe and be shared between mysql2 and named-placeholders - sidorares/node-mysql2#1711, mysqljs/named-placeholders#19
-   `chai` and `mocha` moved to devDependencies [#&#8203;1774](sidorares/node-mysql2#1774)
-   Amazon RDS ssl certificates updated including AWS China [#&#8203;1754](sidorares/node-mysql2#1754)
-   `TCP_NODELAY` flag enabled, avoiding long connect timeout in some scenarios [#&#8203;1751](sidorares/node-mysql2#1751)
-   typing improvements: [#&#8203;1675](sidorares/node-mysql2#1675), [#&#8203;1674](sidorares/node-mysql2#1674)
-   fix:  ensure pooled connections get released [#&#8203;1666](sidorares/node-mysql2#1666)

##### Miscellaneous Chores

-   release 3.0.0 ([11692b2](sidorares/node-mysql2@11692b2))

### [`v2.3.3`](sidorares/node-mysql2@v2.3.2...v2.3.3)

[Compare Source](sidorares/node-mysql2@v2.3.2...v2.3.3)

### [`v2.3.2`](sidorares/node-mysql2@v2.3.1...v2.3.2)

[Compare Source](sidorares/node-mysql2@v2.3.1...v2.3.2)

### [`v2.3.1`](sidorares/node-mysql2@v2.3.0...v2.3.1)

[Compare Source](sidorares/node-mysql2@v2.3.0...v2.3.1)

### [`v2.3.0`](sidorares/node-mysql2@v2.2.5...v2.3.0)

[Compare Source](sidorares/node-mysql2@v2.2.5...v2.3.0)

</details>

---

### Configuration

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♻ **Rebasing**: Whenever PR becomes conflicted, or you tick the rebase/retry checkbox.

🔕 **Ignore**: Close this PR and you won't be reminded about this update again.

---

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---

This PR has been generated by [Renovate Bot](https://github.com/renovatebot/renovate).
<!--renovate-debug:eyJjcmVhdGVkSW5WZXIiOiIzNC43NC4yIiwidXBkYXRlZEluVmVyIjoiMzQuNzQuMiJ9-->

Co-authored-by: Renovate Bot <[email protected]>
Reviewed-on: https://gitea.vylpes.xyz/RabbitLabs/Droplet/pulls/128
Reviewed-by: Vylpes <[email protected]>
Co-authored-by: RenovateBot <[email protected]>
Co-committed-by: RenovateBot <[email protected]>
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@dsech @sidorares