diff --git a/docs-2.0-en/5.configurations-and-logs/1.configurations/6.kernel-config.md b/docs-2.0-en/5.configurations-and-logs/1.configurations/6.kernel-config.md index 9d49dabb893..1d8bc369d36 100644 --- a/docs-2.0-en/5.configurations-and-logs/1.configurations/6.kernel-config.md +++ b/docs-2.0-en/5.configurations-and-logs/1.configurations/6.kernel-config.md @@ -4,33 +4,30 @@ This topic introduces the Kernel configurations in Nebula Graph. ## Resource control -### ulimit precautions - -The `ulimit` command specifies the resource threshold for the current shell session. The precautions are as follows: - -- The changes made by `ulimit` only take effect for the current session or child process. - -- The resource threshold (soft threshold) cannot exceed the hard threshold. - -- Common users cannot use commands to adjust the hard threshold, even with `sudo`. - -- To modify the system level or adjust the hard threshold, edit the file `/etc/security/limits.conf`. This method requires re-login to take effect. - -### ulimit -c - -`ulimit -c` limits the size of the core dumps. We recommend that you set it to `unlimited`. The command is: +You may run the `ulimit` command to control the resource threshold. However, the changes made only take effect for the current session or sub-process. To make permanent changes, edit file `/etc/security/limits.conf`. The configuration is as follows: ```bash -ulimit -c unlimited +# +* soft core unlimited +* hard core unlimited +* soft nofile 130000 +* hard nofile 130000 ``` -### ulimit -n +!!! note -`ulimit -n` limits the number of open files. We recommend that you set it to more than 100,000. For example: + The configuration modification takes effect for new sessions. -```bash -ulimit -n 130000 -``` +The parameter descriptions are as follows. + +|Parameter|Description| +|:--|:--| +|`domain`| Control Domain. This parameter can be a user name, a user group name (starting with `@`), or `*` to indicate all users.| +|`type`| Control type. This parameter can be `soft` or `hard`. `soft` indicates a soft threshold (the default threshold) for the resource and `hard` indicates a maximum value that can be set by the user. The `ulimit` command can be used to increase `soft`, but not to exceed `hard`.| +|`item`| Resource types. For example, `core` limits the size of the core dump file, and `nofile` limits the maximum number of file descriptors a process can open.| +|`value`| Resource limit value. This parameter can be a number, or `unlimited` to indicate that there is no limit.| + +You can run `man limits.conf` for more helpful information. ## Memory diff --git a/docs-2.0-zh/5.configurations-and-logs/1.configurations/6.kernel-config.md b/docs-2.0-zh/5.configurations-and-logs/1.configurations/6.kernel-config.md index 8e24474bae2..ddaab65e679 100644 --- a/docs-2.0-zh/5.configurations-and-logs/1.configurations/6.kernel-config.md +++ b/docs-2.0-zh/5.configurations-and-logs/1.configurations/6.kernel-config.md @@ -4,32 +4,30 @@ ## 资源控制 -### ulimit 注意事项 - -命令`ulimit`用于为当前 shell 会话设置资源阈值，注意事项如下： - -- `ulimit`所做的更改仅对当前会话或子进程生效。 - -- 资源的阈值（软阈值）不能超过硬阈值。 - -- 普通用户不能使用命令调整硬阈值，即使使用`sudo`也不能调整。 - -- 修改系统级别或调整硬性阈值，请编辑文件`/etc/security/limits.conf`。这种方式需要重新登录才生效。 -### ulimit -c - -`ulimit -c`用于限制 core 文件的大小，建议设置为`unlimited`，命令如下： +虽然可以用`ulimit`进行资源控制，但是所做的更改仅对当前会话或子进程生效。如果需要永久生效，请编辑文件`/etc/security/limits.conf`。配置如下： ```bash -ulimit -c unlimited +# +* soft core unlimited +* hard core unlimited +* soft nofile 130000 +* hard nofile 130000 ``` -### ulimit -n +!!! note -`ulimit -n`用于限制打开文件的数量，建议设置为超过 10 万，例如： + 配置修改后会对新的会话生效。 -```bash -ulimit -n 130000 -``` +参数说明如下。 + +|参数|说明| +|:--|:--| +|`domain`|控制域。可以是用户名称、用户组名称（以`@`开头），或者用`*`表示所有用户。| +|`type`|控制类型。可以是`soft`或`hard`。`soft`表示资源的软阈值（默认阈值），`hard`表示用户可以设置的最大值。可以使用`ulimit`命令提高`soft`，但不能超过`hard`。| +|`item`|资源类型。例如`core`限制核心转储文件的大小，`nofile`限制一个进程可以打开的最大文件描述符数量。| +|`value`|资源限制值。可以是一个数字，或者 unlimited 表示没有限制。| + +可以执行`man limits.conf`查看更多帮助信息。 ## 内存