The phenomenon is that even root users cannot access the database, and the memory of the mysqld process in the task manager cannot be released and remains unchanged.
innodb_buffer_pool_size=2048M

2024-06-24 21:01:08 136 [Warning] Aborted connection 136 to db: 'dss' user: 'mysql' host: '192.168.1.91' (Got an error reading communication packets)
2024-06-24 21:01:08 137 [Warning] Aborted connection 137 to db: 'dss' user: 'mysql' host: '192.168.1.91' (Got an error reading communication packets)
2024-06-24 21:01:08 139 [Warning] Aborted connection 139 to db: 'dss' user: 'mysql' host: '192.168.1.91' (Got an error reading communication packets)
2024-06-24 21:01:08 140 [Warning] Aborted connection 140 to db: 'dss' user: 'mysql' host: '192.168.1.91' (Got an error reading communication packets)
2024-06-24 21:01:08 148 [Warning] Aborted connection 148 to db: 'dss' user: 'mysql' host: '192.168.1.91' (Got an error reading communication packets)
2024-06-24 21:01:08 141 [Warning] Aborted connection 141 to db: 'dss' user: 'mysql' host: '192.168.1.91' (Got an error reading communication packets)
2024-06-24 21:01:08 149 [Warning] Aborted connection 149 to db: 'dss' user: 'mysql' host: '192.168.1.91' (Got an error reading communication packets)
2024-06-24 21:01:27 153 [Warning] Access denied for user 'ޔ^p?'?Vf?J>???'@'192.168.1.91' (using password: YES)
2024-06-24 21:01:37 181 [Warning] Access denied for user 'ޔ^p?'?Vf?J>???'@'192.168.1.91' (using password: YES)
2024-06-24 21:01:37 182 [Warning] Access denied for user 'ޔ^p?'?Vf?J>???'@'192.168.1.91' (using password: YES)
2024-06-24 21:01:47 188 [Warning] Access denied for user 'ޔ^p?'?Vf?J>???'@'192.168.1.91' (using password: YES)
2024-06-24 21:01:57 189 [Warning] Access denied for user 'ޔ^p?'?Vf?J>???'@'192.168.1.91' (using password: YES)
2024-06-24 21:02:07 190 [Warning] Access denied for user 'ޔ^p?'?Vf?J>???'@'192.168.1.91' (using password: YES)
2024-06-24 21:02:17 191 [Warning] Access denied for user 'ޔ^p?'?Vf?J>???'@'192.168.1.91' (using password: YES)
2024-06-24 21:02:27 199 [Warning] Access denied for user 'ޔ^p?'?Vf?J>???'@'192.168.1.91' (using password: YES)
2024-06-24 21:57:27 226 [Warning] InnoDB: Could not free any blocks in the buffer pool! 129856 blocks are in use and 0 free. Consider increasing innodb_buffer_pool_size.