# after ran the mysqltuner.pl for percona xtaDB cluster 8.0.19 , I need to understand it

**URL:** <https://forums.percona.com/t/after-ran-the-mysqltuner-pl-for-percona-xtadb-cluster-8-0-19-i-need-to-understand-it/7893>\
**Category:** Percona XtraDB Cluster 8.x\
**Tags:** community, mysql, percona\
**Created:** [August 12, 2020, 6:30am UTC](https://forums.percona.com/t/after-ran-the-mysqltuner-pl-for-percona-xtadb-cluster-8-0-19-i-need-to-understand-it/7893 "2020-08-12T06:30:25Z")\
**Posts on this page:** 4\
**Page:** 1

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**Author:** ![DBA100](https://avatars.discourse-cdn.com/v4/letter/d/b3f665/32.png) [@DBA100](https://forums.percona.com/u/DBA100)\
**Post date:** [August 12, 2020, 6:30am UTC](https://forums.percona.com/t/after-ran-the-mysqltuner-pl-for-percona-xtadb-cluster-8-0-19-i-need-to-understand-it/7893/1 "2020-08-12T06:30:25Z")

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hi,

I just built up a percona xtraDB cluster 8.0.19 and found out the existing global variable for percona xtraDB cluster 5.7. x can’t on 8.0.19, I ran mysqltuner.pl to see what is the suggestion and I see this output like this and I don’t know which one is the problem and what is the suggested value for it.  
Question now is:  
  
&nbsp;1) it said “[–] This is a standalone server”, is not true, as it is the primary node of the new 8.0.18 cluster.  
  
&nbsp;2) “Reduce your overall MySQL memory footprint for system stability”  
what am I supposed to do ?  
  
&nbsp;3) should I just read this section:

Variables to adjust:

[MySQLTuner result.docx](https://forums.percona.com/uploads/short-url/aECefFVyhs1AvsV2TpzwIPUf2Vj.docx) (17.3 KB)

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**Author:** ![daniil.bazhenov](https://sea1.discourse-cdn.com/flex019/user_avatar/forums.percona.com/daniil.bazhenov/32/62_2.png) [@daniil.bazhenov](https://forums.percona.com/u/daniil.bazhenov)\
**Post date:** [August 12, 2020, 7:08am UTC](https://forums.percona.com/t/after-ran-the-mysqltuner-pl-for-percona-xtadb-cluster-8-0-19-i-need-to-understand-it/7893/2 "2020-08-12T07:08:36Z")

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@DBA100   
Please format your message. Use it:&nbsp;1. wysiwyg and its tools (hi, h2, h3, quote, li, ul)2. Tag Code and Spoiler3. You can attach a file with logs or a code.

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<div class="post-metadata">

**Author:** ![DBA100](https://avatars.discourse-cdn.com/v4/letter/d/b3f665/32.png) [@DBA100](https://forums.percona.com/u/DBA100)\
**Post date:** [August 12, 2020, 10:21am UTC](https://forums.percona.com/t/after-ran-the-mysqltuner-pl-for-percona-xtadb-cluster-8-0-19-i-need-to-understand-it/7893/3 "2020-08-12T10:21:14Z")

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here you go.

[MySQLTuner result.docx](https://forums.percona.com/uploads/short-url/aECefFVyhs1AvsV2TpzwIPUf2Vj.docx) (17.3 KB)

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<div class="post-metadata">

**Author:** ![DBA100](https://avatars.discourse-cdn.com/v4/letter/d/b3f665/32.png) [@DBA100](https://forums.percona.com/u/DBA100)\
**Post date:** [August 20, 2020, 5:42am UTC](https://forums.percona.com/t/after-ran-the-mysqltuner-pl-for-percona-xtadb-cluster-8-0-19-i-need-to-understand-it/7893/4 "2020-08-20T05:42:21Z")

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[p](https://forums.percona.com/discussion/56032/the-topology-design-of-xtradb-cluster-8-0-19#latest)lease help on this:  
  
[https://forums.percona.com/discussion/56032/the-topology-design-of-xtradb-cluster-8-0-19#latest](https://forums.percona.com/discussion/56032/the-topology-design-of-xtradb-cluster-8-0-19#latest "Link: https://forums.percona.com/discussion/56032/the-topology-design-of-xtradb-cluster-8-0-19#latest")