chore: update change logs

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Shawn 2023-04-11 00:10:22 +08:00
parent 0801c130b0
commit f17d2fe9c4
2 changed files with 10 additions and 5 deletions

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[error] Accept error on 0.0.0.0:1883: EMFILE (Too many open files)
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- Improve the performance of the rule engine when there are many 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.
In this optimization, the efficiency of rule execution in this scenario was greatly improved by simply adding a cache to the rule list.
In our tests (with over 700 rules), the rule engine achieved a performance improvement of about 5 times after applying this optimization.
- 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 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, we simply added a cache to the rule list, which greatly improved the efficiency of rule execution in this scenario.
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

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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)
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。
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