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Most people do not understand the knowledge points of this article "what is the impact of Mysql long affairs", so the editor summarizes the following contents, detailed content, clear steps, and has a certain reference value. I hope you can get something after reading this article. Let's take a look at this "what is the impact of Mysql long affairs" article.

1. Long transactions mean that there will be a very old transaction view in the system. Before committing this transaction, you should keep a rollback record, which will result in a large amount of storage space.

2. Long transactions will also take up lock resources and may drag down the database.

Example

SELECT ps.id 'PROCESS ID', ps.USER, ps.HOST, esh.EVENT_ID, trx.trx_started, esh.event_name' EVENT NAME', esh.sql_text 'SQL' Ps.timeFROM performance_schema.events_statements_history esh JOIN performance_schema.threads th ON esh.thread_id = th.thread_id JOIN information_schema.PROCESSLIST ps ON ps.id = th.processlist_id LEFT JOIN information_schema.innodb_trx trx ON trx.trx_mysql_thread_id = ps.idWHERE trx.trx_id IS NOT NULL AND ps.USER! = 'SYSTEM_USER' AND ps.id = process IDORDER BY esh.EVENT_ID The above is the content of this article on "what is the impact of Mysql's long-term affairs". I believe we all have a certain understanding. I hope the content shared by the editor will be helpful to you. If you want to know more about the relevant knowledge, please follow the industry information channel.

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