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This repository is ONLY used to solve problems related to DOCS-CN. For other issues (TiDB, TiKV, etc), please move to other repositories.
Please answer the following questions before submitting your issue. Thanks!
原文:
此处提到了 NUMA 架构,但未限制单进程的内存用量,这有可能会导致跨 NUMA Node 访问内存。跨 NUMA Node 访问内存,会极大地降低性能(早期服务器 7 倍,后期 1.3 倍)。 仅限制了:
进程数
NUMA CPU 的个数
NUMA Node 数
物理 CPU 数
单个 NUMA Node 中 CPU 的核心数
max-procs
那么在使用过程中,肯定会有部分 TiDB 申请额外的 NUMA Node 外的内存,因为进程并非绝对平分内存。应额外添加:
单个 TiDB 进程可使用的内存上限
单个 NUMA Node 内的内存容量
限制进程内存使用。
The text was updated successfully, but these errors were encountered:
@Icemap 谢谢反馈。@qqqdan 请帮忙确认下可以吗?
Sorry, something went wrong.
性能测试的相关内容我不太熟悉,请问 @dbsid 焕生老师这边有没有建议?
shichun-0415
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Error 报告
This repository is ONLY used to solve problems related to DOCS-CN.
For other issues (TiDB, TiKV, etc), please move to other repositories.
Please answer the following questions before submitting your issue. Thanks!
原文:
此处提到了 NUMA 架构,但未限制单进程的内存用量,这有可能会导致跨 NUMA Node 访问内存。跨 NUMA Node 访问内存,会极大地降低性能(早期服务器 7 倍,后期 1.3 倍)。
仅限制了:
进程数
=NUMA CPU 的个数
(其实此处是否应该使用NUMA Node 数
或物理 CPU 数
替代NUMA CPU 的个数
来消除歧义?)单个 NUMA Node 中 CPU 的核心数
=max-procs
那么在使用过程中,肯定会有部分 TiDB 申请额外的 NUMA Node 外的内存,因为进程并非绝对平分内存。应额外添加:
单个 TiDB 进程可使用的内存上限
=单个 NUMA Node 内的内存容量
(即:单路内存容量)限制进程内存使用。
The text was updated successfully, but these errors were encountered: