MySQL Variables net_buffer_length 数据库 参数变量解释及正确配置使用
本站中文解释
net_buffer_length变量是MySQL用来控制网络连接缓冲区大小的变量，它会影响MySQL服务器与客户端之间发送和接收数据的效率。如果网络缓冲区大小不足以满足要求，会显著影响MySQL性能和数据传输速度。
net_buffer_length的参数默认大小是16384 bytes，如果想要调整这个参数的大小，只需要使用MySQL的SET语句更新下面的变量：
变量：
SET GLOBAL net_buffer_length=;
其中是您想要设置的实际大小，数值以字节为单位，范围从1到16777215字节。但是，要注意的是，如果这个参数太大，服务器会耗尽内存资源，最终导致性能下降或者宕机。因此，请确保在配置此参数时谨慎考虑。
官方英文解释
net_buffer_length
| Command-Line Format | --net-buffer-length=# |
|---|---|
| System Variable | net_buffer_length |
| Scope | Global, Session |
| Dynamic | Yes |
| Type | Integer |
| Default Value | 16384 |
| Minimum Value | 1024 |
| Maximum Value | 1048576 |
| Unit | bytes |
| Block Size | 1024 |
Each client thread is associated with a connection buffer and
result buffer. Both begin with a size given by
net_buffer_length but are
dynamically enlarged up to
max_allowed_packet bytes as
needed. The result buffer shrinks to
net_buffer_length after each
SQL statement.
This variable should not normally be changed, but if you have
very little memory, you can set it to the expected length of
statements sent by clients. If statements exceed this length,
the connection buffer is automatically enlarged. The maximum
value to which
net_buffer_length can be set
is 1MB.
The session value of this variable is read only.
