From 5c9a23aaf1e3dfde3a94f76ca3de64ed9d8cd88b Mon Sep 17 00:00:00 2001 From: bb7133 Date: Thu, 22 Sep 2022 23:07:32 +0800 Subject: [PATCH 1/3] system-variables: add documents for `error_count` and `max_connections` --- system-variables.md | 22 +++++++++++++++++++--- 1 file changed, 19 insertions(+), 3 deletions(-) diff --git a/system-variables.md b/system-variables.md index b82a3dff2a1c0..0cc1740442828 100644 --- a/system-variables.md +++ b/system-variables.md @@ -223,6 +223,12 @@ For more possible values of this variable, see [Authentication plugin status](/s - Range: `[0, 7]` - Sets the week format used by the `WEEK()` function. +### error_count + +- Scope: NONE +- Type: Integer +- A read-only variable that indicates the number of errors that resulted from the last statement that generated messages. + ### foreign_key_checks - Scope: SESSION | GLOBAL @@ -333,6 +339,16 @@ This variable is an alias for `last_insert_id`. - Unit: Bytes - The maximum size of a packet for the MySQL protocol. +### max_connections + +- Scope: GLOBAL +- Persists to cluster: No +- Type: Integer +- Default value: `0` +- Range: `[0, 100000]` +- The maximum number of connections for a single TiDB instance. +- The value of `0` means no limit. + ### max_execution_time - Scope: SESSION | GLOBAL @@ -499,19 +515,19 @@ mysql> SHOW GLOBAL VARIABLES LIKE 'max_prepared_stmt_count'; - Scope: NONE - Default value: "" -- The location of the certificate authority file (if there is one). +- The location of the certificate authority file (if there is one), the value of this variable is defined by [`ssl-ca` configuration](https://docs.pingcap.com/tidb/dev/tidb-configuration-file#ssl-ca). ### ssl_cert - Scope: NONE - Default value: "" -- The location of the certificate file (if there is a file) that is used for SSL/TLS connections. +- The location of the certificate file (if there is a file) that is used for SSL/TLS connections, the value of this variable is defined by [`ssl-cert` configuration](https://docs.pingcap.com/tidb/dev/tidb-configuration-file#ssl-cert). ### ssl_key - Scope: NONE - Default value: "" -- The location of the private key file (if there is one) that is used for SSL/TLS connections. +- The location of the private key file (if there is one) that is used for SSL/TLS connections, the value of this variable is defined by [`ssl-key` configuration](https://docs.pingcap.com/tidb/dev/tidb-configuration-file#ssl-cert). ### system_time_zone From 0ee49c8227065813b7e0ddfe56c643357d0fbd86 Mon Sep 17 00:00:00 2001 From: TomShawn <41534398+TomShawn@users.noreply.github.com> Date: Sat, 8 Oct 2022 14:27:52 +0800 Subject: [PATCH 2/3] Apply suggestions from code review --- system-variables.md | 8 ++++---- 1 file changed, 4 insertions(+), 4 deletions(-) diff --git a/system-variables.md b/system-variables.md index 0cc1740442828..a6cc5c190bc3a 100644 --- a/system-variables.md +++ b/system-variables.md @@ -346,7 +346,7 @@ This variable is an alias for `last_insert_id`. - Type: Integer - Default value: `0` - Range: `[0, 100000]` -- The maximum number of connections for a single TiDB instance. +- The maximum number of connections permitted for a single TiDB instance. - The value of `0` means no limit. ### max_execution_time @@ -515,19 +515,19 @@ mysql> SHOW GLOBAL VARIABLES LIKE 'max_prepared_stmt_count'; - Scope: NONE - Default value: "" -- The location of the certificate authority file (if there is one), the value of this variable is defined by [`ssl-ca` configuration](https://docs.pingcap.com/tidb/dev/tidb-configuration-file#ssl-ca). +- The location of the certificate authority file (if there is one), the value of this variable is defined by the TiDB configuration item [`ssl-ca`](/tidb-configuration-file.md#ssl-ca). ### ssl_cert - Scope: NONE - Default value: "" -- The location of the certificate file (if there is a file) that is used for SSL/TLS connections, the value of this variable is defined by [`ssl-cert` configuration](https://docs.pingcap.com/tidb/dev/tidb-configuration-file#ssl-cert). +- The location of the certificate file (if there is a file) that is used for SSL/TLS connections, the value of this variable is defined by the TiDB configuration item [`ssl-cert`](/tidb-configuration-file.md#ssl-cert). ### ssl_key - Scope: NONE - Default value: "" -- The location of the private key file (if there is one) that is used for SSL/TLS connections, the value of this variable is defined by [`ssl-key` configuration](https://docs.pingcap.com/tidb/dev/tidb-configuration-file#ssl-cert). +- The location of the private key file (if there is one) that is used for SSL/TLS connections, the value of this variable is defined by TiDB configuration item [`ssl-key`](/tidb-configuration-file.md#ssl-cert). ### system_time_zone From ca5983db468ee39a7d4342dc90db5aa5312a67b0 Mon Sep 17 00:00:00 2001 From: TomShawn <41534398+TomShawn@users.noreply.github.com> Date: Sat, 8 Oct 2022 14:43:40 +0800 Subject: [PATCH 3/3] add custom content --- system-variables.md | 42 +++++++++++++++++++++++++++++++++++++++--- 1 file changed, 39 insertions(+), 3 deletions(-) diff --git a/system-variables.md b/system-variables.md index a6cc5c190bc3a..f5834221febb4 100644 --- a/system-variables.md +++ b/system-variables.md @@ -513,21 +513,57 @@ mysql> SHOW GLOBAL VARIABLES LIKE 'max_prepared_stmt_count'; ### ssl_ca + + - Scope: NONE - Default value: "" -- The location of the certificate authority file (if there is one), the value of this variable is defined by the TiDB configuration item [`ssl-ca`](/tidb-configuration-file.md#ssl-ca). +- The location of the certificate authority file (if there is one). The value of this variable is defined by the TiDB configuration item [`ssl-ca`](/tidb-configuration-file.md#ssl-ca). + + + + + +- Scope: NONE +- Default value: "" +- The location of the certificate authority file (if there is one). The value of this variable is defined by the TiDB configuration item [`ssl-ca`](https://docs.pingcap.com/tidb/stable/tidb-configuration-file#ssl-ca). + + ### ssl_cert + + - Scope: NONE - Default value: "" -- The location of the certificate file (if there is a file) that is used for SSL/TLS connections, the value of this variable is defined by the TiDB configuration item [`ssl-cert`](/tidb-configuration-file.md#ssl-cert). +- The location of the certificate file (if there is a file) that is used for SSL/TLS connections. The value of this variable is defined by the TiDB configuration item [`ssl-cert`](/tidb-configuration-file.md#ssl-cert). + + + + + +- Scope: NONE +- Default value: "" +- The location of the certificate file (if there is a file) that is used for SSL/TLS connections. The value of this variable is defined by the TiDB configuration item [`ssl-cert`](https://docs.pingcap.com/tidb/stable/tidb-configuration-file#ssl-cert). + + ### ssl_key + + +- Scope: NONE +- Default value: "" +- The location of the private key file (if there is one) that is used for SSL/TLS connections. The value of this variable is defined by TiDB configuration item [`ssl-key`](/tidb-configuration-file.md#ssl-cert). + + + + + - Scope: NONE - Default value: "" -- The location of the private key file (if there is one) that is used for SSL/TLS connections, the value of this variable is defined by TiDB configuration item [`ssl-key`](/tidb-configuration-file.md#ssl-cert). +- The location of the private key file (if there is one) that is used for SSL/TLS connections. The value of this variable is defined by TiDB configuration item [`ssl-key`](https://docs.pingcap.com/tidb/stable/tidb-configuration-file#ssl-key). + + ### system_time_zone