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chore: update change logs

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Shawn 2023-04-11 00:10:22 +08:00
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11
changes/v4.4.17-en.md
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[error] Accept error on 0.0.0.0:1883: EMFILE (Too many open files) [error] Accept error on 0.0.0.0:1883: EMFILE (Too many open files)
``` ```
- Improve the performance of the rule engine when there are many rules [#10283](https://github.com/emqx/emqx/pull/10283) - Improve the performance of the rule engine when there are a large number of rules [#10283](https://github.com/emqx/emqx/pull/10283)
Before this change, when there were many rules, the execution of the rule engine became a bottleneck, it consumed a lot of CPU time on rule queries and matches. Before this change, when there were a large number of rules, the execution of the rule engine became a bottleneck, as the rule engine consumed a lot of CPU time on rule queries and matching.
In this optimization, the efficiency of rule execution in this scenario was greatly improved by simply adding a cache to the rule list. In this optimization, we simply added a cache to the rule list, which greatly improved the efficiency of rule execution in this scenario.
In our tests (with over 700 rules), the rule engine achieved a performance improvement of about 5 times after applying this optimization. In our tests, we created 700 rules that did not perform any actions (bound to the "do_nothing" debugging action) on a 32-core, 32GB virtual machine,
and sent MQTT messages to EMQX at a rate of 1000 messages per second (i.e. a rule trigger frequency of 700 * 1000 times per second).
After applying this optimization, the CPU usage of the rule engine dropped to 55% to 60% of its original level.
## Bug fixes ## Bug fixes

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changes/v4.4.17-zh.md
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- 提升规则数量较多时规则引擎的执行性能 [#10283](https://github.com/emqx/emqx/pull/10283) - 提升规则数量较多时规则引擎的执行性能 [#10283](https://github.com/emqx/emqx/pull/10283)
在此改动之前，当规则数量比较多的时候，规则引擎的执行会成为瓶颈，规则引擎将耗费大量 CPU 在规则的查询和匹配上。 在此改动之前，当规则数量比较多的时候，规则引擎的执行会成为瓶颈，规则引擎将耗费大量 CPU 在规则的查询和匹配上。
本次优化中，通过简单地给规则列表添加一个缓存，大幅提升了此场景下的规则执行效率。 本次优化中，通过简单地给规则列表添加一个缓存，大幅提升了此场景下的规则执行效率。
在我们的测试中（700多条规则），应用此优化后规则引擎获得了 5 倍左右的性能提升。 在我们的测试中，在一个 32 核 32G 的虚拟机上，我们创建了 700 条不执行任何动作的规则（绑定了 "do_nothing" 调试动作），
并以 1000 条每秒的速度向 EMQX 发送 MQTT 消息（即，规则触发频率为 700 * 1000 次每秒），
在应用此优化后，规则引擎的 CPU 使用率下降到了原来的 55% ~ 60%。
## 修复 ## 修复