Shulou(Shulou.com)06/01 Report--

This article is to share with you about how to solve the deadlock caused by insert ignore and ON DUPLICATE KEY UPDATE. The editor thinks it is very practical, so I share it with you. I hope you can get something after reading this article.

First record the conclusion, and then analyze the process when you are free:

Multi-threaded writing and duplicate data will result in a gap lock due to unique constraint checking. Deadlocks occur when multiple transactions need to hold lock data to other threads.

Solution:

Instead of insert ignore and ON DUPLICATE KEY UPDATE, take the SQL apart and decide whether it needs to be inserted or updated

Single thread operation

Lower isolation level (untested)

The above is how to solve the deadlock caused by insert ignore and ON DUPLICATE KEY UPDATE. The editor believes that there are some knowledge points that we may see or use in our daily work. I hope you can learn more from this article. For more details, please follow the industry information channel.

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