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  • pt-online-schema-change

    错误Threads_running=58 exceeds its critical threshold 50

    #pt-online-schema-change --user=root --password= e835 --alter='ENGINE=InnoDB' --socket=/data/db/mysql6980/mysql6980.sock --execute D='discuz_db',t='pre_forum_post'
    1> Cannot connect to S=/data/db/mysql6980/mysql6980.sock,h=172.106.301.52,p=...,u=root
    1> Cannot connect to S=/data/db/mysql6980/mysql6980.sock,h=172.106.301.53,p=...,u=root
    1> Cannot connect to S=/data/db/mysql6980/mysql6980.sock,h=172.106.301.54,p=...,u=root
    No slaves found. See --recursion-method if host ca444egi-b44-mys44ql02 has slaves.
    Not checking slave lag because no slaves were found and --check-slave-lag was not specified.
    Operation, tries, wait:
    analyze_table, 10, 1
    copy_rows, 10, 0.25
    create_triggers, 10, 1
    drop_triggers, 10, 1
    swap_tables, 10, 1
    update_foreign_keys, 10, 1
    Altering `discuz_db`.`pre_forum_post`...
    Creating new table...
    Created new table discuz_db._pre_forum_post_new OK.
    Altering new table...
    Altered `discuz_db`.`_pre_forum_post_new` OK.
    2019-04-24T09:14:44 Creating triggers...
    2019-04-24T09:14:44 Created triggers OK.
    2019-04-24T09:14:44 Copying approximately 17085984 rows...
    2019-04-24T09:14:59 Dropping triggers...
    2019-04-24T09:14:59 Dropped triggers OK.
    2019-04-24T09:14:59 Dropping new table...
    2019-04-24T09:14:59 Dropped new table OK.
    `discuz_db`.`pre_forum_post` was not altered.
    2019-04-24T09:14:59 Error copying rows from `discuz_db`.`pre_forum_post` to `discuz_db`.`_pre_forum_post_new`: Threads_running=58 exceeds its critical threshold 50

    解决办法:

    refer to:https://www.percona.com/forums/questions-discussions/percona-toolkit/11746-pt-online-schema-change-showing-this-error-exceeds-its-critical-threshold-50

    添加: "--critical-load Threads_running=100"项

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  • 原文地址:https://www.cnblogs.com/102x/p/10760528.html
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