java - batch insert size :488

Question

spring boot中如果试用多线程，这些线程去执行sql的时候是不是一个一个线程轮流的？
因为我在执行一段代码的时候发现
[pool-5-thread-2] : batch insert size :488
[pool-5-thread-4] : time: 14512 seconds.
[pool-5-thread-4] : batch insert size :1084
[pool-5-thread-1] : time: 20217 seconds.
[pool-5-thread-1] : batch insert size :2030
[pool-5-thread-3] : time: 27216 seconds.
[pool-5-thread-3] : batch insert size :1034
这里time时间是执行sql所用时间，time是累加的。如果每条线程执行sql不是轮流来的，那么这个time不应该是累加的啊

Answer 1

Is your insert statement inserting into a table? If it is a table, the locking mechanism of the database can only insert in turns

Answer 2

It depends on how you calculate time. It is thread local and thread share variable.