2013/3/13 Rick James <rja...@yahoo-inc.com>: > What settings? (innodb_autoinc_lock_mode comes to mind, but there may be > others.) Hi, Rick.
Many thanks for the quick answer here is my settings: mysql> show variables like '%inc%'; +-----------------------------+-------+ | Variable_name | Value | +-----------------------------+-------+ | auto_increment_increment | 1 | | auto_increment_offset | 1 | | div_precision_increment | 4 | | innodb_autoextend_increment | 8 | | innodb_autoinc_lock_mode | 1 | +-----------------------------+-------+ 5 rows in set (0.00 sec) > > It is acceptable, by the definition of AUTO_INCREMENT, for it to burn the > missing 15K ids. I don't get this explanation, could you please explain bit more? So it's completely normal for AUTO_INCREMENT field to act like this? > >> -----Original Message----- >> From: spameden [mailto:spame...@gmail.com] >> Sent: Tuesday, March 12, 2013 2:34 PM >> To: mysql@lists.mysql.com >> Subject: auto_increment field behavior >> >> Hi, I'm running MySQL-5.5 on Ubuntu >> >> ~ $ mysqld -V >> mysqld Ver 5.5.29-0ubuntu0.12.04.2 for debian-linux-gnu on x86_64 >> ((Ubuntu)) >> >> Would like to know if it's normal behavior with auto_increment field >> (tried both signed and unsigned now): >> >> mysql> show create table phone_codes; >> +-------------+-------------------------------------------------------- >> ----------------------------------------------------------------------- >> ----------------------------------------------------------------------- >> ----------------------------------------------------------------------- >> ----------------------------------------------------------------------- >> ----------------------------------------------------------------------- >> ----------------------------------------------------------------------- >> ----------------------------------------------------------------------- >> ----------------------------------------------------------------------- >> --+ >> | Table | Create Table >> >> >> >> >> >> >> >> >> | >> +-------------+-------------------------------------------------------- >> ----------------------------------------------------------------------- >> ----------------------------------------------------------------------- >> ----------------------------------------------------------------------- >> ----------------------------------------------------------------------- >> ----------------------------------------------------------------------- >> ----------------------------------------------------------------------- >> ----------------------------------------------------------------------- >> ----------------------------------------------------------------------- >> --+ >> | phone_codes | CREATE TABLE `phone_codes` ( >> `pc_id` int(11) NOT NULL AUTO_INCREMENT, >> `pc_type` enum('ABC','DEF') DEFAULT NULL, >> `pc_code` decimal(3,0) NOT NULL, >> `pc_from` decimal(7,0) NOT NULL, >> `pc_to` decimal(7,0) NOT NULL, >> `pc_capacity` decimal(8,0) NOT NULL, >> `pc_operator` varchar(255) DEFAULT NULL, >> `pc_city` varchar(255) DEFAULT NULL, >> `pc_region` varchar(255) DEFAULT NULL, >> PRIMARY KEY (`pc_id`), >> KEY `pc_code` (`pc_code`), >> KEY `pc_code_from_to` (`pc_code`,`pc_from`,`pc_to`), >> KEY `pc_operator` (`pc_operator`), >> KEY `pc_city` (`pc_city`), >> KEY `pc_region` (`pc_region`) >> ) ENGINE=InnoDB DEFAULT CHARSET=utf8 | >> +-------------+-------------------------------------------------------- >> ----------------------------------------------------------------------- >> ----------------------------------------------------------------------- >> ----------------------------------------------------------------------- >> ----------------------------------------------------------------------- >> ----------------------------------------------------------------------- >> ----------------------------------------------------------------------- >> ----------------------------------------------------------------------- >> ----------------------------------------------------------------------- >> --+ >> 1 row in set (0.00 sec) >> >> mysql> load data infile '/tmp/ABC3x' into table phone_codes fields >> terminated by ';' enclosed by '#' lines terminated by '\r\n' >> (pc_code,pc_from,pc_to,pc_capacity,pc_operator,pc_city,pc_region) SET >> pc_type='ABC'; Query OK, 17922 rows affected (4.44 sec) >> Records: 17922 Deleted: 0 Skipped: 0 Warnings: 0 >> >> mysql> show create table phone_codes; >> +-------------+-------------------------------------------------------- >> ----------------------------------------------------------------------- >> ----------------------------------------------------------------------- >> ----------------------------------------------------------------------- >> ----------------------------------------------------------------------- >> ----------------------------------------------------------------------- >> ----------------------------------------------------------------------- >> ----------------------------------------------------------------------- >> ----------------------------------------------------------------------- >> -----------------------+ >> | Table | Create Table >> >> >> >> >> >> >> >> >> | >> +-------------+-------------------------------------------------------- >> ----------------------------------------------------------------------- >> ----------------------------------------------------------------------- >> ----------------------------------------------------------------------- >> ----------------------------------------------------------------------- >> ----------------------------------------------------------------------- >> ----------------------------------------------------------------------- >> ----------------------------------------------------------------------- >> ----------------------------------------------------------------------- >> -----------------------+ >> | phone_codes | CREATE TABLE `phone_codes` ( >> `pc_id` int(11) NOT NULL AUTO_INCREMENT, >> `pc_type` enum('ABC','DEF') DEFAULT NULL, >> `pc_code` decimal(3,0) NOT NULL, >> `pc_from` decimal(7,0) NOT NULL, >> `pc_to` decimal(7,0) NOT NULL, >> `pc_capacity` decimal(8,0) NOT NULL, >> `pc_operator` varchar(255) DEFAULT NULL, >> `pc_city` varchar(255) DEFAULT NULL, >> `pc_region` varchar(255) DEFAULT NULL, >> PRIMARY KEY (`pc_id`), >> KEY `pc_code` (`pc_code`), >> KEY `pc_code_from_to` (`pc_code`,`pc_from`,`pc_to`), >> KEY `pc_operator` (`pc_operator`), >> KEY `pc_city` (`pc_city`), >> KEY `pc_region` (`pc_region`) >> ) ENGINE=InnoDB AUTO_INCREMENT=32768 DEFAULT CHARSET=utf8 | >> +-------------+-------------------------------------------------------- >> ----------------------------------------------------------------------- >> ----------------------------------------------------------------------- >> ----------------------------------------------------------------------- >> ----------------------------------------------------------------------- >> ----------------------------------------------------------------------- >> ----------------------------------------------------------------------- >> ----------------------------------------------------------------------- >> ----------------------------------------------------------------------- >> -----------------------+ >> 1 row in set (0.00 sec) >> >> NOTE: AUTO_INCREMENT is 32768 instead of 17923 ! So next inserted row >> would have pc_id=32768. >> >> Please suggest if it's normal behavior or not. >> >> Many thanks. >> >> -- >> MySQL General Mailing List >> For list archives: http://lists.mysql.com/mysql >> To unsubscribe: http://lists.mysql.com/mysql > -- MySQL General Mailing List For list archives: http://lists.mysql.com/mysql To unsubscribe: http://lists.mysql.com/mysql
