qwaszx92717 commented on issue #8528: URL: https://github.com/apache/shardingsphere/issues/8528#issuecomment-742914942
> Hi @qwaszx92717 , > > Thanks for your info. > ShardingSphere helps user handle SQLs queried in a database cluster though, the consuming time your provided is longer than expected. > The actual SQL is executed in MySQL using the index, isn't it? > Have you ever counted how many seconds one actual SQL takes? I am curious where that `15s` is used. This column have index. At that time，I connect some shading database and try to execute SQL in some sharding table. example：select * from **table_1** where column in (...); this query speed is very fast. after troubleshooting ，I print the stack information ，found that most of the time it was pointing to sharding. sharding log as above,but no useful information was found. ---------------------------------------------------------------- This is an automated message from the Apache Git Service. To respond to the message, please log on to GitHub and use the URL above to go to the specific comment. For queries about this service, please contact Infrastructure at: [email protected]
