# PXC 8.0 lag at other nodes ...?

**URL:** <https://forums.percona.com/t/pxc-8-0-lag-at-other-nodes/9476>\
**Category:** Percona XtraDB Cluster\
**Tags:** mysql, percona\
**Created:** [March 1, 2021, 2:21pm UTC](https://forums.percona.com/t/pxc-8-0-lag-at-other-nodes/9476 "2021-03-01T14:21:35Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![AneeshBabu](https://sea1.discourse-cdn.com/flex019/user_avatar/forums.percona.com/aneeshbabu/32/1393_2.png) [@AneeshBabu](https://forums.percona.com/u/AneeshBabu)\
**Post date:** [March 1, 2021, 2:21pm UTC](https://forums.percona.com/t/pxc-8-0-lag-at-other-nodes/9476/1 "2021-03-01T14:21:35Z")

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Hi there,  
There is a 3 node cluster(`pcx 8.0`),say A,B and C.If `1000` insert statements has been executed at `node A`.

1.How would i know the lag in other nodes i.e `B,C`, like lag by `Seconds_Behind_Master` in replication or log sequence no if any ?  
2.Or these `1000` insert statements executed parallel at all the nodes .?  
3.how much time does it take to execute at other nodes i.e `B,C` ?

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<div class="post-metadata">

**Author:** ![matthewb](https://sea1.discourse-cdn.com/flex019/user_avatar/forums.percona.com/matthewb/32/34_2.png) [@matthewb](https://forums.percona.com/u/matthewb)\
**Post date:** [March 1, 2021, 7:40pm UTC](https://forums.percona.com/t/pxc-8-0-lag-at-other-nodes/9476/2 "2021-03-01T19:40:23Z")

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You can look at `wsrep_local_recv_queue` and `wsrep_local_send_queue` along with comparing `wsrep_last_applied` and `wsrep_last_committed` between two nodes. There is no time-based equivalent like S-b-m.

1. No, the 1000 statements would go through certification and apply in async fashion on nodes B and C. They may be parallelized within each node, but that is at the node level, not the cluster level.

2. It depends. Is the hardware the same? Config the same? In theory, as fast as possible. Remember that PXC is synchronous replication, async apply.