在使用v1.2.3版本进行表结构比对时，源库MySQL设置了最大连接数151。使用如下的配置文件，设置parallelThds = 1、queueSize = 1，执行比对名命令# ./gt-checksum -f ./gtc_struct_check.conf
cat gtc_struct_check.conf
[DSNs]
srcDSN = mysql|xxx
dstDSN = mysql|xxxxxxx
[Schema]
tables = db1.:db2.
checkNoIndexTable = yes
caseSensitiveObjectName = no
[Rules]
parallelThds = 1
queueSize = 1
chunkSize = 10000
checkObject = struct
memoryLimit =2048
[Repair]
datafix = file
fixTrxNum = 1000
fixFileName = ./datafix_struct.sql
[Logs]
logFile = ./gtc.log11
logLevel = info
;logLevel = debug
运行后发现源库的连接数会一直增长一直增长（select count (1) from information_schema.processlist;），最后会报错
Initializing gt-checksum
Reading configuration files
Opening log files
Checking configuration options
gt-checksum: Starting table checks
gt-checksum: Checking table structure
gt-checksum: Table structure verification failed. Check ./gtc.log11 for details or set logLevel=debug
tail gtc.log11
[2026/03/04 11:07:31] [error] dbquery_dispos.go:392 (5) [Q_Table_Comment] The first connection to the MySQL database failed to execute the sql statement.sql message is {SELECT TABLE_COMMENT AS tableComment FROM INFORMATION_SCHEMA.TABLES WHERE TABLE_SCHEMA='' AND TABLE_NAME='xxx';} Error info is {Error 1040: Too many connections}
[2026/03/04 11:07:32] [error] dbquery_dispos.go:392 (5) [Q_Table_Comment] The second connection to the MySQL database failed to execute the sql statement.sql message is {SELECT TABLE_COMMENT AS tableComment FROM INFORMATION_SCHEMA.TABLES WHERE TABLE_SCHEMA='' AND TABLE_NAME='xxx';} Error info is {Error 1040: Too many connections}
[2026/03/04 11:07:33] [error] dbquery_dispos.go:392 (5) [Q_Table_Comment] The third connection to the MySQL database failed to execute the sql statement.sql message is {SELECT TABLE_COMMENT AS tableComment FROM INFORMATION_SCHEMA.TABLES WHERE TABLE_SCHEMA='' AND TABLE_NAME='xxx';} Error info is {Error 1040: Too many connections}
[2026/03/04 11:07:33] [error] dbquery_dispos.go:395 (5) [Q_Table_Comment] Failed to connect to the MySQL database, unable to execute the sql statement.
[2026/03/04 11:07:33] [error] schema_tab_struct.go:328 (5) Error checking source table existence gujing_new.scada_data_table: Error 1040: Too many connections
请问如何控制不断增加的连接数量
在使用v1.2.3版本进行表结构比对时，源库MySQL设置了最大连接数151。使用如下的配置文件，设置parallelThds = 1、queueSize = 1，执行比对名命令# ./gt-checksum -f ./gtc_struct_check.conf
cat gtc_struct_check.conf
[DSNs]
srcDSN = mysql|xxx
dstDSN = mysql|xxxxxxx
[Schema]
tables = db1.:db2.
checkNoIndexTable = yes
caseSensitiveObjectName = no
[Rules]
parallelThds = 1
queueSize = 1
chunkSize = 10000
checkObject = struct
memoryLimit =2048
[Repair]
datafix = file
fixTrxNum = 1000
fixFileName = ./datafix_struct.sql
[Logs]
logFile = ./gtc.log11
logLevel = info
;logLevel = debug
运行后发现源库的连接数会一直增长一直增长（select count (1) from information_schema.processlist;），最后会报错
Initializing gt-checksum
Reading configuration files
Opening log files
Checking configuration options
gt-checksum: Starting table checks
gt-checksum: Checking table structure
gt-checksum: Table structure verification failed. Check ./gtc.log11 for details or set logLevel=debug
tail gtc.log11
[2026/03/04 11:07:31] [error] dbquery_dispos.go:392 (5) [Q_Table_Comment] The first connection to the MySQL database failed to execute the sql statement.sql message is {SELECT TABLE_COMMENT AS tableComment FROM INFORMATION_SCHEMA.TABLES WHERE TABLE_SCHEMA='' AND TABLE_NAME='xxx';} Error info is {Error 1040: Too many connections}
[2026/03/04 11:07:32] [error] dbquery_dispos.go:392 (5) [Q_Table_Comment] The second connection to the MySQL database failed to execute the sql statement.sql message is {SELECT TABLE_COMMENT AS tableComment FROM INFORMATION_SCHEMA.TABLES WHERE TABLE_SCHEMA='' AND TABLE_NAME='xxx';} Error info is {Error 1040: Too many connections}
[2026/03/04 11:07:33] [error] dbquery_dispos.go:392 (5) [Q_Table_Comment] The third connection to the MySQL database failed to execute the sql statement.sql message is {SELECT TABLE_COMMENT AS tableComment FROM INFORMATION_SCHEMA.TABLES WHERE TABLE_SCHEMA='' AND TABLE_NAME='xxx';} Error info is {Error 1040: Too many connections}
[2026/03/04 11:07:33] [error] dbquery_dispos.go:395 (5) [Q_Table_Comment] Failed to connect to the MySQL database, unable to execute the sql statement.
[2026/03/04 11:07:33] [error] schema_tab_struct.go:328 (5) Error checking source table existence gujing_new.scada_data_table: Error 1040: Too many connections
请问如何控制不断增加的连接数量