--help, -? --help, -?

显示帮助信息并退出。Display a help message and exit.

--bind-address=ip_address --bind-address=ip_address

在具有多个网络接口的计算机上，使用此选项选择用于连接到 MySQL 服务器的接口。On a computer having multiple network interfaces, use this option to select which interface to use for connecting to the MySQL server.

--character-sets-dir=dir_name --character-sets-dir=dir_name

安装字符集的目录。请参见第 12.15 节，“字符集配置”。The directory where character sets are installed. See Section 12.15, “Character Set Configuration”.

--columns=column_list, -c column_list --columns=column_list, -c column_list

此选项将以逗号分隔的列名称列表作为其值。列名称的顺序表示如何将数据文件列与表列匹配。This option takes a list of comma-separated column names as its value. The order of the column names indicates how to match data file columns with table columns.

--compress, -C

如果可能，压缩客户端与服务器之间发送的所有信息。参见 第 6.2.8 节，“连接压缩控制”。Compress all information sent between the client and the server if possible. See Section 6.2.8, “Connection Compression Control”.

此选项已被弃用。预计将在 MySQL 的未来版本中移除。请参阅 配置遗留连接压缩。This option is deprecated. Expect it to be removed in a future version of MySQL. See Configuring Legacy Connection Compression.

--compression-algorithms=value --compression-algorithms=value

允许用于与服务器连接的压缩算法。可用算法与 protocol_compression_algorithms 系统变量的算法相同。默认值为 uncompressed。The permitted compression algorithms for connections to the server. The available algorithms are the same as for the protocol_compression_algorithms system variable. The default value is uncompressed.

更多信息，请参阅 第 6.2.8 节，“连接压缩控制”。For more information, see Section 6.2.8, “Connection Compression Control”.

--debug[=debug_options], -# [debug_options] --debug[=debug_options], -# [debug_options]

写入调试日志。典型的 debug_options 字符串是 d:t:o,file_name。默认值是 d:t:o。Write a debugging log. A typical debug_options string is d:t:o,file_name. The default is d:t:o.

此选项仅在 MySQL 使用 WITH_DEBUG 构建时可用。Oracle 提供的 MySQL 发行版二进制文件 未 使用此选项构建。This option is available only if MySQL was built using WITH_DEBUG. MySQL release binaries provided by Oracle are not built using this option.

--debug-check

程序退出时打印一些调试信息。Print some debugging information when the program exits.

此选项仅在 MySQL 使用 WITH_DEBUG 构建时可用。Oracle 提供的 MySQL 发行版二进制文件 未 使用此选项构建。This option is available only if MySQL was built using WITH_DEBUG. MySQL release binaries provided by Oracle are not built using this option.

--debug-info

在程序退出时打印调试信息以及内存和 CPU 使用情况统计。Print debugging information and memory and CPU usage statistics when the program exits.

此选项仅在 MySQL 使用 WITH_DEBUG 构建时可用。Oracle 提供的 MySQL 发行版二进制文件 未 使用此选项构建。This option is available only if MySQL was built using WITH_DEBUG. MySQL release binaries provided by Oracle are not built using this option.

--default-character-set=charset_name --default-character-set=charset_name

使用 charset_name 作为默认字符集。请参见 第 12.15 节，“字符集配置”。Use charset_name as the default character set. See Section 12.15, “Character Set Configuration”.

--default-auth=plugin --default-auth=plugin

关于使用哪种客户端身份验证插件的提示。请参见 第 8.2.17 节，“可插拔身份验证”。A hint about which client-side authentication plugin to use. See Section 8.2.17, “Pluggable Authentication”.

--defaults-extra-file=file_name --defaults-extra-file=file_name

在全局选项文件之后读取此选项文件，但（在 Unix 系统上）在用户选项文件之前。如果该文件不存在或无法访问，将发生错误。如果 file_name 不是绝对路径名，则相对于当前目录解释。Read this option file after the global option file but (on Unix) before the user option file. If the file does not exist or is otherwise inaccessible, an error occurs. If file_name is not an absolute path name, it is interpreted relative to the current directory.

有关此选项文件选项及其他选项文件选项的更多信息，请参见 第 6.2.2.3 节，“影响选项文件处理的命令行选项”。For additional information about this and other option-file options, see Section 6.2.2.3, “Command-Line Options that Affect Option-File Handling”.

--defaults-file=file_name --defaults-file=file_name

仅使用指定的选项文件。如果文件不存在或无法访问，将会发生错误。如果file_name不是绝对路径名，则将其相对于当前目录解释。Use only the given option file. If the file does not exist or is otherwise inaccessible, an error occurs. If file_name is not an absolute path name, it is interpreted relative to the current directory.

例外：即使使用--defaults-file，客户端程序仍会读取.mylogin.cnf。Exception: Even with --defaults-file, client programs read .mylogin.cnf.

有关此选项文件选项及其他选项文件选项的更多信息，请参见 第 6.2.2.3 节，“影响选项文件处理的命令行选项”。For additional information about this and other option-file options, see Section 6.2.2.3, “Command-Line Options that Affect Option-File Handling”.

--defaults-group-suffix=str --defaults-group-suffix=str

不仅要读取常规的选项组，还要读取带有常规名称并附有 str 后缀的组。例如，mysqlimport 通常读取 [client] 和 [mysqlimport] 组。如果该选项被指定为 --defaults-group-suffix=_other，mysqlimport 还会读取 [client_other] 和 [mysqlimport_other] 组。Read not only the usual option groups, but also groups with the usual names and a suffix of str. For example, mysqlimport normally reads the [client] and [mysqlimport] groups. If this option is given as --defaults-group-suffix=_other, mysqlimport also reads the [client_other] and [mysqlimport_other] groups.

有关此选项文件选项及其他选项文件选项的更多信息，请参见 第 6.2.2.3 节，“影响选项文件处理的命令行选项”。For additional information about this and other option-file options, see Section 6.2.2.3, “Command-Line Options that Affect Option-File Handling”.

--delete, -D

在导入文本文件之前请清空表格。Empty the table before importing the text file.

--enable-cleartext-plugin

启用 mysql_clear_password 明文身份验证插件。（参见 第 8.4.1.4 节，“客户端明文可插拔身份验证”。）Enable the mysql_clear_password cleartext authentication plugin. (See Section 8.4.1.4, “Client-Side Cleartext Pluggable Authentication”.)

--fields-terminated-by=..., --fields-enclosed-by=..., --fields-optionally-enclosed-by=..., --fields-escaped-by=...

这些选项的含义与 LOAD DATA 的相应子句相同。请参见 第 15.2.9 节，“LOAD DATA 语句”。These options have the same meaning as the corresponding clauses for LOAD DATA. See Section 15.2.9, “LOAD DATA Statement”.

--force, -f

忽略错误。例如，如果文本文件的表不存在，则继续处理剩余的文件。如果没有 --force，mysqlimport 会在表不存在时退出。Ignore errors. For example, if a table for a text file does not exist, continue processing any remaining files. Without --force, mysqlimport exits if a table does not exist.

--get-server-public-key

向服务器请求用于基于 RSA 密钥对的密码交换所需的公钥。此选项适用于使用 caching_sha2_password 身份验证插件进行身份验证的客户端。对于该插件，服务器不会发送公钥，除非被请求。对于未使用该插件进行身份验证的账户，此选项将被忽略。当未使用基于 RSA 的密码交换时（例如客户端使用安全连接连接服务器时），此选项也将被忽略。Request from the server the public key required for RSA key pair-based password exchange. This option applies to clients that authenticate with the caching_sha2_password authentication plugin. For that plugin, the server does not send the public key unless requested. This option is ignored for accounts that do not authenticate with that plugin. It is also ignored if RSA-based password exchange is not used, as is the case when the client connects to the server using a secure connection.

如果提供了 --server-public-key-path=file_name 并指定了有效的公钥文件，它将优先于 --get-server-public-key。If --server-public-key-path=file_name is given and specifies a valid public key file, it takes precedence over --get-server-public-key.

有关 caching_sha2_password 插件的信息，请参见 第 8.4.1.2 节，“缓存 SHA-2 可插拔认证”。For information about the caching_sha2_password plugin, see Section 8.4.1.2, “Caching SHA-2 Pluggable Authentication”.

--host=host_name, -h host_name

将数据导入到指定主机上的 MySQL 服务器。默认主机为 localhost。Import data to the MySQL server on the given host. The default host is localhost.

--ignore, -i

参见 --replace 选项的描述。See the description for the --replace option.

--ignore-lines=N

忽略数据文件的前 N 行。Ignore the first N lines of the data file.

--lines-terminated-by=...

此选项与 LOAD DATA 对应子句的含义相同。例如，要导入以回车/换行符结尾的 Windows 文件，请使用 --lines-terminated-by="\r\n"。（根据命令解释器的转义规则，可能需要将反斜杠加倍。）请参阅 第 15.2.9 节，“LOAD DATA 语句”。This option has the same meaning as the corresponding clause for LOAD DATA. For example, to import Windows files that have lines terminated with carriage return/linefeed pairs, use --lines-terminated-by="\r\n". (You might have to double the backslashes, depending on the escaping conventions of your command interpreter.) See Section 15.2.9, “LOAD DATA Statement”.

--local, -L

默认情况下，文件由服务器在服务器主机上读取。使用此选项，mysqlimport 在客户端主机上本地读取输入文件。By default, files are read by the server on the server host. With this option, mysqlimport reads input files locally on the client host.

在 mysqlimport 中成功使用 LOCAL 加载操作还需要服务器允许本地加载；请参见 第 8.1.6 节，“LOAD DATA LOCAL 的安全性考虑”Successful use of LOCAL load operations within mysqlimport also requires that the server permits local loading; see Section 8.1.6, “Security Considerations for LOAD DATA LOCAL”

--lock-tables, -l

在处理任何文本文件之前锁定所有表以进行写操作。这确保了服务器上所有表的同步。Lock all tables for writing before processing any text files. This ensures that all tables are synchronized on the server.

--login-path=name --login-path=name

从名为登录路径的 .mylogin.cnf 登录路径文件中读取选项。“登录路径” 是一个选项组，包含指定要连接哪个 MySQL 服务器以及以哪个帐户进行身份验证的选项。要创建或修改登录路径文件，请使用 mysql_config_editor 工具。参见 第 6.6.7 节，“mysql_config_editor — MySQL 配置工具”。Read options from the named login path in the .mylogin.cnf login path file. A “login path” is an option group containing options that specify which MySQL server to connect to and which account to authenticate as. To create or modify a login path file, use the mysql_config_editor utility. See Section 6.6.7, “mysql_config_editor — MySQL Configuration Utility”.

有关此选项文件选项及其他选项文件选项的更多信息，请参见 第 6.2.2.3 节，“影响选项文件处理的命令行选项”。For additional information about this and other option-file options, see Section 6.2.2.3, “Command-Line Options that Affect Option-File Handling”.

--no-login-paths

跳过从登录路径文件读取选项。Skips reading options from the login path file.

参见 --login-path 以获取相关信息。See --login-path for related information.

有关此选项文件选项及其他选项文件选项的更多信息，请参见 第 6.2.2.3 节，“影响选项文件处理的命令行选项”。For additional information about this and other option-file options, see Section 6.2.2.3, “Command-Line Options that Affect Option-File Handling”.

--low-priority --low-priority

在加载表时使用LOW_PRIORITY。这仅影响仅使用表级锁定的存储引擎（例如MyISAM、MEMORY和MERGE）。Use LOW_PRIORITY when loading the table. This affects only storage engines that use only table-level locking (such as MyISAM, MEMORY, and MERGE).

--no-defaults --no-defaults

不要读取任何选项文件。如果程序启动因从选项文件读取未知选项而失败，可以使用 --no-defaults 来防止读取这些选项。Do not read any option files. If program startup fails due to reading unknown options from an option file, --no-defaults can be used to prevent them from being read.

例外情况是，如果存在，.mylogin.cnf 文件在所有情况下都会被读取。这允许以比命令行更安全的方式指定密码，即使使用了 --no-defaults。要创建 .mylogin.cnf，请使用 mysql_config_editor 工具。请参阅 第 6.6.7 节，“mysql_config_editor — MySQL 配置工具”。The exception is that the .mylogin.cnf file is read in all cases, if it exists. This permits passwords to be specified in a safer way than on the command line even when --no-defaults is used. To create .mylogin.cnf, use the mysql_config_editor utility. See Section 6.6.7, “mysql_config_editor — MySQL Configuration Utility”.

有关此选项文件选项及其他选项文件选项的更多信息，请参见 第 6.2.2.3 节，“影响选项文件处理的命令行选项”。For additional information about this and other option-file options, see Section 6.2.2.3, “Command-Line Options that Affect Option-File Handling”.

--password[=password], -p[password] --password[=password], -p[password]

用于连接服务器的 MySQL 帐户的密码。密码值是可选的。如果未提供，mysqlimport 会提示输入密码。如果提供了密码，--password= 或 -p 后面与密码之间不得有空格。如果未指定密码选项，默认不发送密码。The password of the MySQL account used for connecting to the server. The password value is optional. If not given, mysqlimport prompts for one. If given, there must be no space between --password= or -p and the password following it. If no password option is specified, the default is to send no password.

在命令行中指定密码应被视为不安全。为了避免在命令行中输入密码，请使用选项文件。请参阅 第 8.1.2.1 节，“终端用户密码安全指南”。Specifying a password on the command line should be considered insecure. To avoid giving the password on the command line, use an option file. See Section 8.1.2.1, “End-User Guidelines for Password Security”.

要明确指定没有密码，并且 mysqlimport 不应提示输入密码，请使用 --skip-password 选项。To explicitly specify that there is no password and that mysqlimport should not prompt for one, use the --skip-password option.

--password1[=pass_val] --password1[=pass_val]

用于连接服务器的 MySQL 帐户多因素认证因素 1 的密码。密码值是可选的。如果未提供，mysqlimport 会提示输入密码。如果提供，则 --password1= 和随后的密码之间 不能有空格。如果未指定密码选项，默认是不发送密码。The password for multifactor authentication factor 1 of the MySQL account used for connecting to the server. The password value is optional. If not given, mysqlimport prompts for one. If given, there must be no space between --password1= and the password following it. If no password option is specified, the default is to send no password.

在命令行中指定密码应被视为不安全。为了避免在命令行中输入密码，请使用选项文件。请参阅 第 8.1.2.1 节，“终端用户密码安全指南”。Specifying a password on the command line should be considered insecure. To avoid giving the password on the command line, use an option file. See Section 8.1.2.1, “End-User Guidelines for Password Security”.

要明确指定没有密码，并且 mysqlimport 不应提示输入密码，请使用 --skip-password1 选项。To explicitly specify that there is no password and that mysqlimport should not prompt for one, use the --skip-password1 option.

--password1 和 --password 是同义的，--skip-password1 和 --skip-password 也是同义的。--password1 and --password are synonymous, as are --skip-password1 and --skip-password.

--password2[=pass_val] --password2[=pass_val]

用于连接服务器的 MySQL 账户的多因素认证第二因子的密码。此选项的语义与 --password1 的语义类似；详情请参见该选项的描述。The password for multifactor authentication factor 2 of the MySQL account used for connecting to the server. The semantics of this option are similar to the semantics for --password1; see the description of that option for details.

--password3[=pass_val] --password3[=pass_val]

用于连接服务器的 MySQL 帐户的多因素认证第 3 因子的密码。此选项的语义类似于 --password1 的语义；详细信息请参见该选项的描述。The password for multifactor authentication factor 3 of the MySQL account used for connecting to the server. The semantics of this option are similar to the semantics for --password1; see the description of that option for details.

--pipe, -W

在 Windows 上，通过命名管道连接到服务器。此选项仅在服务器启动时已启用 named_pipe 系统变量以支持命名管道连接的情况下适用。此外，进行连接的用户必须是由 named_pipe_full_access_group 系统变量指定的 Windows 组的成员。On Windows, connect to the server using a named pipe. This option applies only if the server was started with the named_pipe system variable enabled to support named-pipe connections. In addition, the user making the connection must be a member of the Windows group specified by the named_pipe_full_access_group system variable.

--plugin-dir=dir_name --plugin-dir=dir_name

查找插件的目录。如果使用 --default-auth 选项来指定认证插件，但 mysqlimport 未找到它，则请指定此选项。参见 第 8.2.17 节，“可插拔认证”。The directory in which to look for plugins. Specify this option if the --default-auth option is used to specify an authentication plugin but mysqlimport does not find it. See Section 8.2.17, “Pluggable Authentication”.

--port=port_num, -P port_num --port=port_num, -P port_num

对于 TCP/IP 连接，要使用的端口号。For TCP/IP connections, the port number to use.

--print-defaults

打印程序名称以及它从选项文件中获取的所有选项。Print the program name and all options that it gets from option files.

有关此选项文件选项及其他选项文件选项的更多信息，请参见 第 6.2.2.3 节，“影响选项文件处理的命令行选项”。For additional information about this and other option-file options, see Section 6.2.2.3, “Command-Line Options that Affect Option-File Handling”.

--protocol={TCP|SOCKET|PIPE|MEMORY}

用于连接服务器的传输协议。当其他连接参数通常导致使用的协议不是您想要的协议时，这很有用。有关允许值的详细信息，请参阅第 6.2.7 节，“连接传输协议”。The transport protocol to use for connecting to the server. It is useful when the other connection parameters normally result in use of a protocol other than the one you want. For details on the permissible values, see Section 6.2.7, “Connection Transport Protocols”.

--replace, -r

--replace 和 --ignore 选项用于控制处理在唯一键值上与现有行重复的输入行。如果指定 --replace，新行将替换具有相同唯一键值的现有行。如果指定 --ignore，与现有行在唯一键值上重复的输入行将被跳过。如果没有指定任何选项，在发现重复键值时会发生错误，并且文本文件的其余部分将被忽略。The --replace and --ignore options control handling of input rows that duplicate existing rows on unique key values. If you specify --replace, new rows replace existing rows that have the same unique key value. If you specify --ignore, input rows that duplicate an existing row on a unique key value are skipped. If you do not specify either option, an error occurs when a duplicate key value is found, and the rest of the text file is ignored.

--server-public-key-path=file_name --server-public-key-path=file_name

包含服务器所需的 RSA 密钥对密码交换的客户端副本公钥的 PEM 格式文件的路径名。此选项适用于使用 sha256_password（已弃用）或 caching_sha2_password 身份验证插件进行身份验证的客户端。对于不使用这些插件之一进行身份验证的帐户，将忽略此选项。如果未使用基于 RSA 的密码交换（例如客户端使用安全连接连接到服务器的情况），此选项也将被忽略。The path name to a file in PEM format containing a client-side copy of the public key required by the server for RSA key pair-based password exchange. This option applies to clients that authenticate with the sha256_password (deprecated) or caching_sha2_password authentication plugin. This option is ignored for accounts that do not authenticate with one of those plugins. It is also ignored if RSA-based password exchange is not used, as is the case when the client connects to the server using a secure connection.

如果提供了 --server-public-key-path=file_name 并指定了有效的公钥文件，它将优先于 --get-server-public-key。If --server-public-key-path=file_name is given and specifies a valid public key file, it takes precedence over --get-server-public-key.

对于 sha256_password（已弃用），此选项仅在 MySQL 使用 OpenSSL 构建时才适用。For sha256_password (deprecated), this option applies only if MySQL was built using OpenSSL.

有关 sha256_password 和 caching_sha2_password 插件的信息，请参见 第 8.4.1.3 节，“SHA-256 可插拔认证” 和 第 8.4.1.2 节，“缓存 SHA-2 可插拔认证”。For information about the sha256_password and caching_sha2_password plugins, see Section 8.4.1.3, “SHA-256 Pluggable Authentication”, and Section 8.4.1.2, “Caching SHA-2 Pluggable Authentication”.

--shared-memory-base-name=name --shared-memory-base-name=name

在 Windows 上，通过共享内存连接到本地服务器时使用的共享内存名称。默认值是 MYSQL。共享内存名称区分大小写。On Windows, the shared-memory name to use for connections made using shared memory to a local server. The default value is MYSQL. The shared-memory name is case-sensitive.

此选项仅在服务器启用了 shared_memory 系统变量以支持共享内存连接时适用。This option applies only if the server was started with the shared_memory system variable enabled to support shared-memory connections.

--silent, -s

静音模式。仅在发生错误时输出。Silent mode. Produce output only when errors occur.

--socket=path, -S path --socket=path, -S path

用于连接localhost时，使用的 Unix 套接字文件，或者在 Windows 上使用的命名管道的名称。For connections to localhost, the Unix socket file to use, or, on Windows, the name of the named pipe to use.

在 Windows 上，此选项仅在服务器启用支持命名管道连接的 named_pipe 系统变量启动时才适用。此外，进行连接的用户必须是由 named_pipe_full_access_group 系统变量指定的 Windows 组的成员。On Windows, this option applies only if the server was started with the named_pipe system variable enabled to support named-pipe connections. In addition, the user making the connection must be a member of the Windows group specified by the named_pipe_full_access_group system variable.

--ssl*

以--ssl开头的选项指定是否使用加密连接到服务器，并指示在哪里可以找到 SSL 密钥和证书。请参阅 加密连接的命令选项。Options that begin with --ssl specify whether to connect to the server using encryption and indicate where to find SSL keys and certificates. See Command Options for Encrypted Connections.

--ssl-fips-mode={OFF|ON|STRICT} --ssl-fips-mode={OFF|ON|STRICT}

控制是否在客户端启用 FIPS 模式。--ssl-fips-mode 选项不同于其他 --ssl-xxx 选项，因为它并不是用于建立加密连接，而是用于影响允许哪些加密操作。请参见 第 8.8 节，“FIPS 支持”。Controls whether to enable FIPS mode on the client side. The --ssl-fips-mode option differs from other --ssl-xxx options in that it is not used to establish encrypted connections, but rather to affect which cryptographic operations to permit. See Section 8.8, “FIPS Support”.

以下 --ssl-fips-mode 值是允许的：These --ssl-fips-mode values are permitted:

此选项已弃用。预计将在未来的 MySQL 版本中移除。This option is deprecated. Expect it to be removed in a future version of MySQL.

--tls-ciphersuites=ciphersuite_list

用于 TLSv1.3 加密连接的允许密码套件。该值是一个或多个用冒号分隔的密码套件名称的列表。此选项可指定的密码套件取决于用于编译 MySQL 的 SSL 库。有关详细信息，请参见 第 8.3.2 节，“加密连接的 TLS 协议和密码”。The permissible ciphersuites for encrypted connections that use TLSv1.3. The value is a list of one or more colon-separated ciphersuite names. The ciphersuites that can be named for this option depend on the SSL library used to compile MySQL. For details, see Section 8.3.2, “Encrypted Connection TLS Protocols and Ciphers”.

--tls-sni-servername=server_name --tls-sni-servername=server_name

如果指定了名称，该名称将通过 mysql_options() 的 MYSQL_OPT_TLS_SNI_SERVERNAME 选项传递给 libmysqlclient C API 库。服务器名称不区分大小写。要显示客户端为当前会话指定的服务器名称（如果有），请检查 Tls_sni_server_name 状态变量。When specified, the name is passed to the libmysqlclient C API library using the MYSQL_OPT_TLS_SNI_SERVERNAME option of mysql_options(). The server name is not case-sensitive. To show which server name the client specified for the current session, if any, check the Tls_sni_server_name status variable.

服务器名称指示（SNI）是 TLS 协议的一个扩展（必须使用支持 TLS 扩展的 OpenSSL 编译此选项才能生效）。MySQL 对 SNI 的实现仅代表客户端。Server Name Indication (SNI) is an extension to the TLS protocol (OpenSSL must be compiled using TLS extensions for this option to function). The MySQL implementation of SNI represents the client-side only.

--tls-version=protocol_list --tls-version=protocol_list

用于加密连接的允许 TLS 协议。值是一个或多个以逗号分隔的协议名称列表。此选项可指定的协议取决于用于编译 MySQL 的 SSL 库。详情请参见 第 8.3.2 节，“加密连接 TLS 协议和密码”。The permissible TLS protocols for encrypted connections. The value is a list of one or more comma-separated protocol names. The protocols that can be named for this option depend on the SSL library used to compile MySQL. For details, see Section 8.3.2, “Encrypted Connection TLS Protocols and Ciphers”.

--user=user_name, -u user_name --user=user_name, -u user_name

用于连接服务器的 MySQL 帐户用户名。The user name of the MySQL account to use for connecting to the server.

--use-threads=N

使用 N 个线程并行加载文件。Load files in parallel using N threads.

--verbose, -v

详细模式。打印有关程序执行内容的更多信息。Verbose mode. Print more information about what the program does.

--version, -V

显示版本信息并退出。Display version information and exit.

--zstd-compression-level=level --zstd-compression-level=level

用于与服务器连接时使用 zstd 压缩算法的压缩级别。允许的级别从 1 到 22，数值越大表示压缩级别越高。默认的 zstd 压缩级别为 3。对于不使用 zstd 压缩的连接，压缩级别设置没有效果。The compression level to use for connections to the server that use the zstd compression algorithm. The permitted levels are from 1 to 22, with larger values indicating increasing levels of compression. The default zstd compression level is 3. The compression level setting has no effect on connections that do not use zstd compression.

更多信息，请参阅 第 6.2.8 节，“连接压缩控制”。For more information, see Section 6.2.8, “Connection Compression Control”.