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1 [root@iZ23eoaorbaZ ~]# pt-online-schema-change -u root -p xxxxxx -h localhost -A utf8 D=jinyuanbao,t=DistributionGoods --new-table-name DistributionGoods_0 --no-drop-trigger --no-swap-table --no-drop-new-table --execute 2 No slaves found. See --recursion-method if host iZ23eoaorbaZ has slaves. 3 Not checking slave lag because no slaves were found and --check-slave-lag was not specified. 4 Operation, tries, wait: 5 copy_rows, 10, 0.25 6 create_triggers, 10, 1 7 drop_triggers, 10, 1 8 swap_tables, 10, 1 9 update_foreign_keys, 10, 1 10 Altering `jinyuanbao`.`DistributionGoods`... 11 Creating new table... 12 Created new table jinyuanbao.DistributionGoods_0 OK. 13 2015-08-18T10:21:47 Creating triggers... 14 2015-08-18T10:21:47 Created triggers OK. 15 2015-08-18T10:21:47 Copying approximately 16259938 rows... 16 Copying `jinyuanbao`.`DistributionGoods`: 4% 11:05 remain 17 Copying `jinyuanbao`.`DistributionGoods`: 8% 11:18 remain 18 Copying `jinyuanbao`.`DistributionGoods`: 11% 12:02 remain 19 Copying `jinyuanbao`.`DistributionGoods`: 14% 12:16 remain 20 Copying `jinyuanbao`.`DistributionGoods`: 16% 12:18 remain 21 Copying `jinyuanbao`.`DistributionGoods`: 19% 12:25 remain 22 Copying `jinyuanbao`.`DistributionGoods`: 22% 12:05 remain 23 Copying `jinyuanbao`.`DistributionGoods`: 25% 11:44 remain 24 Copying `jinyuanbao`.`DistributionGoods`: 28% 11:07 remain 25 Copying `jinyuanbao`.`DistributionGoods`: 32% 10:27 remain 26 Copying `jinyuanbao`.`DistributionGoods`: 35% 09:50 remain 27 Copying `jinyuanbao`.`DistributionGoods`: 39% 09:13 remain 28 Copying `jinyuanbao`.`DistributionGoods`: 42% 08:37 remain 29 Copying `jinyuanbao`.`DistributionGoods`: 46% 08:02 remain 30 Copying `jinyuanbao`.`DistributionGoods`: 50% 07:27 remain 31 Copying `jinyuanbao`.`DistributionGoods`: 53% 06:54 remain 32 Copying `jinyuanbao`.`DistributionGoods`: 57% 06:24 remain 33 Copying `jinyuanbao`.`DistributionGoods`: 60% 05:51 remain 34 Copying `jinyuanbao`.`DistributionGoods`: 64% 05:19 remain 35 Copying `jinyuanbao`.`DistributionGoods`: 67% 04:47 remain 36 Copying `jinyuanbao`.`DistributionGoods`: 70% 04:19 remain 37 Copying `jinyuanbao`.`DistributionGoods`: 74% 03:48 remain 38 Copying `jinyuanbao`.`DistributionGoods`: 78% 03:14 remain 39 Copying `jinyuanbao`.`DistributionGoods`: 81% 02:47 remain 40 Copying `jinyuanbao`.`DistributionGoods`: 84% 02:18 remain 41 Copying `jinyuanbao`.`DistributionGoods`: 87% 01:48 remain 42 Copying `jinyuanbao`.`DistributionGoods`: 91% 01:18 remain 43 Copying `jinyuanbao`.`DistributionGoods`: 94% 00:48 remain 44 Copying `jinyuanbao`.`DistributionGoods`: 97% 00:20 remain 45 2015-08-18T10:38:03 Copied rows OK. 46 Not dropping old table because --no-drop-triggers was specified. 47 Not dropping triggers because --no-drop-triggers was specified. To drop the triggers, execute: 48 DROP TRIGGER IF EXISTS `jinyuanbao`.`pt_osc_jinyuanbao_DistributionGoods_del`; 49 DROP TRIGGER IF EXISTS `jinyuanbao`.`pt_osc_jinyuanbao_DistributionGoods_upd`; 50 DROP TRIGGER IF EXISTS `jinyuanbao`.`pt_osc_jinyuanbao_DistributionGoods_ins`; 51 Not dropping the new table `jinyuanbao`.`DistributionGoods_0` because --no-drop-new-table was specified. To drop the new table, execute: 52 DROP TABLE IF EXISTS `jinyuanbao`.`DistributionGoods_0`; 53 Successfully altered `jinyuanbao`.`DistributionGoods`. 54 [root@iZ23eoaorbaZ ~]# pt-online-schema-change -u root -p xxxxxxx -h localhost -A utf8 D=jinyuanbao,t=DistributionGoods_0 --new-table-name DistributionGoods_1 --no-drop-trigger --no-swap-table --no-drop-new-table --execute 55 No slaves found. See --recursion-method if host iZ23eoaorbaZ has slaves. 56 Not checking slave lag because no slaves were found and --check-slave-lag was not specified. 57 Operation, tries, wait: 58 copy_rows, 10, 0.25 59 create_triggers, 10, 1 60 drop_triggers, 10, 1 61 swap_tables, 10, 1 62 update_foreign_keys, 10, 1 63 Altering `jinyuanbao`.`DistributionGoods_0`... 64 Creating new table... 65 Created new table jinyuanbao.DistributionGoods_1 OK. 66 2015-08-18T10:46:06 Creating triggers... 67 2015-08-18T10:46:06 Created triggers OK. 68 2015-08-18T10:46:06 Copying approximately 16113957 rows... 69 Copying `jinyuanbao`.`DistributionGoods_0`: 4% 11:21 remain 70 Copying `jinyuanbao`.`DistributionGoods_0`: 8% 11:08 remain 71 Copying `jinyuanbao`.`DistributionGoods_0`: 12% 10:40 remain 72 Copying `jinyuanbao`.`DistributionGoods_0`: 16% 10:17 remain 73 Copying `jinyuanbao`.`DistributionGoods_0`: 19% 10:02 remain 74 Copying `jinyuanbao`.`DistributionGoods_0`: 23% 09:48 remain 75 Copying `jinyuanbao`.`DistributionGoods_0`: 27% 09:16 remain 76 Copying `jinyuanbao`.`DistributionGoods_0`: 30% 08:54 remain 77 Copying `jinyuanbao`.`DistributionGoods_0`: 34% 08:31 remain 78 Copying `jinyuanbao`.`DistributionGoods_0`: 37% 08:11 remain 79 Copying `jinyuanbao`.`DistributionGoods_0`: 41% 07:51 remain 80 Copying `jinyuanbao`.`DistributionGoods_0`: 44% 07:27 remain 81 Copying `jinyuanbao`.`DistributionGoods_0`: 48% 07:02 remain 82 Copying `jinyuanbao`.`DistributionGoods_0`: 51% 06:40 remain 83 Copying `jinyuanbao`.`DistributionGoods_0`: 54% 06:16 remain 84 Copying `jinyuanbao`.`DistributionGoods_0`: 58% 05:47 remain 85 Not dropping triggers because --no-drop-triggers was specified. To drop the triggers, execute: 86 DROP TRIGGER IF EXISTS `jinyuanbao`.`pt_osc_jinyuanbao_DistributionGoods_0_del`; 87 DROP TRIGGER IF EXISTS `jinyuanbao`.`pt_osc_jinyuanbao_DistributionGoods_0_upd`; 88 DROP TRIGGER IF EXISTS `jinyuanbao`.`pt_osc_jinyuanbao_DistributionGoods_0_ins`; 89 Not dropping the new table `jinyuanbao`.`DistributionGoods_1` because --no-drop-new-table was specified. To drop the new table, execute: 90 DROP TABLE IF EXISTS `jinyuanbao`.`DistributionGoods_1`; 91 `jinyuanbao`.`DistributionGoods_0` was not altered. 92 2015-08-18T10:54:31 Error copying rows from `jinyuanbao`.`DistributionGoods_0` to `jinyuanbao`.`DistributionGoods_1`: Threads_running=58 exceeds its critical threshold 50
2015-08-18T10:54:31 Error copying rows from `jinyuanbao`.`DistributionGoods_0` to `jinyuanbao`.`DistributionGoods_1`: Threads_running=58 exceeds its critical threshold 50
原始表2GB,复制出DistributionGoods_0,DistributionGoods_1表,依次安装触发器。
每次chunk操作前后,会根据show global status统计指定的状态量的变化,默认是统计Thread_running。
目的是为了安全,防止原始表上的触发器引起负载过高。这也是为了防止在线DDL对线上的影响。
超过设置的阀值,就会终止操作,在线DDL就会中断。提示的异常如上报错信息。
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原文地址:http://www.cnblogs.com/martinjinyu/p/4738890.html