# Stability of 8.0.x

**URL:** <https://forums.percona.com/t/stability-of-8-0-x/13005>\
**Category:** Percona XtraDB Cluster 8.x\
**Created:** [November 15, 2021, 10:41am UTC](https://forums.percona.com/t/stability-of-8-0-x/13005 "2021-11-15T10:41:55Z")\
**Posts on this page:** 1\
**Showing post:** 3

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**Author:** ![hmilkovi](https://sea1.discourse-cdn.com/flex019/user_avatar/forums.percona.com/hmilkovi/32/3034_2.png) [@hmilkovi](https://forums.percona.com/u/hmilkovi)\
**Post date:** [November 15, 2021, 10:58pm UTC](https://forums.percona.com/t/stability-of-8-0-x/13005/3 "2021-11-15T22:58:24Z")

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Hi @matthewb,  
many thanks for helping 🙂 .

I have monitoring system that saves changes in Xtradb cluster and I’m hitting both issues:

- [https://jira.percona.com/projects/PXC/issues/PXC-3777](https://jira.percona.com/projects/PXC/issues/PXC-3777)
- [https://jira.percona.com/projects/PXC/issues/PXC-3780](https://jira.percona.com/projects/PXC/issues/PXC-3780)

I have big concurrency in updates of data but I balance it to one node and in application logic we retry on lock timeout or deadlock with linear back off.

I don’t see any oom kills or similar. Configuration it the same but 5.7 works great 8.0.x doesn’t 😕 .

Docker image version: 8.0.23-14.1  
Config:

```auto
[mysqld]
# Tuning
innodb_buffer_pool_size = 6G
wsrep_slave_threads = 64
innodb_read_io_threads = 32
innodb_write_io_threads = 32
innodb_io_capacity = 6000
innodb_io_capacity_max = 8000
innodb_purge_threads = 8
innodb_page_cleaners = 8
innodb_buffer_pool_instances = 6
wsrep_provider_options = "pc.weight=10; gcache.size=1G;"
wsrep_sync_wait = 7

# Limits
max-connections = 10000
open-files-limit = 65535

```

Only thing I see in logs is deadlock detected, queries stuck in process list and node get’s thrown out of the cluster after some time.

After hanging I noticed nodes get killed with signal 11 and gcache get’s corrupted.

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