# Percona Server 5.7 replication is slow than 5.6, huge delay

**URL:** <https://forums.percona.com/t/percona-server-5-7-replication-is-slow-than-5-6-huge-delay/5202>\
**Category:** Percona Server for MySQL 5.7\
**Created:** [November 11, 2016, 3:08pm UTC](https://forums.percona.com/t/percona-server-5-7-replication-is-slow-than-5-6-huge-delay/5202 "2016-11-11T15:08:44Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![baoxiao](https://avatars.discourse-cdn.com/v4/letter/b/f6c823/32.png) [@baoxiao](https://forums.percona.com/u/baoxiao)\
**Post date:** [November 11, 2016, 3:08pm UTC](https://forums.percona.com/t/percona-server-5-7-replication-is-slow-than-5-6-huge-delay/5202/1 "2016-11-11T15:08:44Z")

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We are plan to upgrade Percona Server 5.6 to 5.7 because of the replication delay problem during peak hour and hope 5.7 MTS will fixed the problem. We make a test at stating server, before the upgrade we can do about 6000 insert/s without delay. But after the upgrade we can only do 3000 inserts/s. The 5.7 version is 5.7.13-6-log. we only changed these parameters:

slave\_parallel\_type changed from database to LOGICAL\_CLOCK  
slave\_parallel\_workers changed from 2 to 8 // we only have 2 databaases so we use 2 in 5.6 for parallel replication  
sync\_binlog changed from 1 to 0 //with 1 it is even worth

Is there anything need to change?

Thanks