![]() Mysql> set global global_connection_memory_limit=250000000 Mysql> set global global_connection_memory_tracking=ON ![]() Type '\c' to clear the current input statement. Other names may be trademarks of their respective Oracle is a registered trademark of Oracle Corporation and/or itsĪffiliates. Server version: 8.0.32 MySQL Community Server - GPLĬopyright (c) 2000, 2023, Oracle and/or its affiliates. Mysql: Using a password on the command line interface can be insecure. SELECT LENGTH(GROUP_CONCAT(f1 ORDER BY f2)) FROM test.t1 INSERT INTO t1 SELECT f1, f2 + 12288 FROM t1 ĬREATE USER USAGE ON *.* TO RELOAD ON *.* TO SELECT,DROP,INSERT ON test.* TO Login using the created user `user1` and execute the below query # INSERT INTO t1 SELECT f1, f2 + 6144 FROM t1 INSERT INTO t1 SELECT f1, f2 + 3072 FROM t1 INSERT INTO t1 SELECT f1, f2 + 1536 FROM t1 INSERT INTO t1 SELECT f1, f2 + 768 FROM t1 INSERT INTO t1 SELECT f1, f2 + 384 FROM t1 INSERT INTO t1 SELECT f1, f2 + 192 FROM t1 INSERT INTO t1 SELECT f1, f2 + 96 FROM t1 INSERT INTO t1 SELECT f1, f2 + 48 FROM t1 INSERT INTO t1 SELECT f1, f2 + 24 FROM t1 INSERT INTO t1 SELECT f1, f2 + 12 FROM t1 INSERT INTO t1 SELECT f1, f2 + 6 FROM t1 Set global global_connection_memory_limit=250000000 ĬREATE TABLE t1 (f1 LONGTEXT, f2 INTEGER) Set global global_connection_memory_tracking=ON Connect using system user and execute the following: Create a MySQL Server with 8.0.32 community binaryĢ. ![]() I see the commit uses more appropriate wording here: mentioning "queries that try to allocateġ. ![]() As per documentation, the behaviour should be aborting the connection on the *new* queries. The connection on which the query got aborted due to exceeding limits. As you can see in the below repro, there is only one query running in the server. However, based on my testing, the current running query is also aborted. The point to be noted here is, "any new queries from users are rejected with respective errors". Memory used by the InnoDB buffer pool is also not included. The limit set by this variable does not apply to system users, or to the MySQL root account. If any user connection uses more than this amount, any new queries from this connection are rejected with ER_CONN_LIMIT. Set the maximum amount of memory that can be used by a single user connection. You must have the SYSTEM_VARIABLES_ADMIN or SUPER privilege to set this variable. Memory used by the InnoDB buffer pool is excluded from the total. ![]() Memory used by the system users such as the MySQL root user is included in this total, but is not counted towards the disconnection limit such users are never disconnected due to memory usage. Any time that it does, any new queries from users are rejected with ER_GLOBAL_CONN_LIMIT. Set the total amount of memory that can be used by all user connections that is, Global_connection_memory should not exceed this amount. The definition of global_connection_memory_limit and connection_memory_limit is incorrect in the documentation. ![]()
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