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MySQL Server has gone away报错原因汇总版
阅读量:61 次
发布时间:2019-02-25

本文共 1257 字,大约阅读时间需要 4 分钟。

MySQL Server has gone away ??????????????????????????

1. MySQL ???????

??????? MySQL ?????????

  • ???????????????MySQL??????
    mysql -uroot -p -e "SHOW GLOBAL STATUS LIKE 'uptime'"

    ????? uptime ???????MySQL???????????????????

  • ????????MySQL??????????????????
    tail /var/log/mysql/error.log

    ???????????MySQL????????

2. ?????

????????????????????????MySQL server has gone away ???

  • ???????MySQL???????????????
    mysql -uroot -p -e "SHOW GLOBAL VARIABLES LIKE '%timeout%;'"

    ?????

    • connect_timeout: 30?
    • interactive_timeout: 28800?
    • wait_timeout: 28800?
    • innodb_lock_wait_timeout: 50?
  • ???????
    mysql -uroot -p -e "SET SESSION wait_timeout=5; SELECT NOW()"

    ??????????????????

3. ??? server ? kill

????????? server ??? kill ????????????

  • ??????????? kill ????
    mysql -uroot -p -e "SHOW GLOBAL STATUS LIKE 'com_kill'"

    ?? com_kill ??? 0?????????? kill?

4. SQL ???????

? SQL ?????????? max_allowed_packet ??????????

  • ??????? max_allowed_packet ???
    mysql -uroot -p -e "SHOW GLOBAL VARIABLES LIKE 'max_allowed_packet'"

    ??????????????????

    mysql -uroot -p -e "SET GLOBAL max_allowed_packet=16777216;"

    ?????????????????????

5. ??????

???????????????????

  • ????????? pinging MySQL ???????????????????????

??

MySQL Server has gone away ?????????????????? kill ? SQL ???????????????????????????

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