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Posted to commits@servicecomb.apache.org by GitBox <gi...@apache.org> on 2019/06/12 08:26:27 UTC

[GitHub] [servicecomb-pack] pengyu0929 commented on issue #479: 向TxEvent表中插入时，为什么将surrogateId初始化为-1？

pengyu0929 commented on issue #479: 向TxEvent表中插入时，为什么将surrogateId初始化为-1？
URL: https://github.com/apache/servicecomb-pack/issues/479#issuecomment-501172491
 
 
   当alpha接收到omega的消息时，会将消息解析为TxEvent，在初始化时为什么将surrogateId设置为-1,这就导致只执行EntityManager.merge()，将entity交给EntityManager管理，之后都将entity和EntityManager缓存中的数据和表中的数据进行比较，这样严重影响了性能。
   我的理解是：alpha接收到消息就应该执行EntityManager.persist()，直接保存。
   我想知道你们这样做的目的是什么？

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