# Innodb\_Buffer\_pool\_size in a vps with Pesl Onyx ad more than one Mysql installation

**URL:** <https://forums.percona.com/t/innodb-buffer-pool-size-in-a-vps-with-pesl-onyx-ad-more-than-one-mysql-installation/5832>\
**Category:** Other MySQL® Questions\
**Created:** [August 30, 2017, 4:15pm UTC](https://forums.percona.com/t/innodb-buffer-pool-size-in-a-vps-with-pesl-onyx-ad-more-than-one-mysql-installation/5832 "2017-08-30T16:15:59Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![Luigi59](https://avatars.discourse-cdn.com/v4/letter/l/d9b06d/32.png) [@Luigi59](https://forums.percona.com/u/Luigi59)\
**Post date:** [August 30, 2017, 4:15pm UTC](https://forums.percona.com/t/innodb-buffer-pool-size-in-a-vps-with-pesl-onyx-ad-more-than-one-mysql-installation/5832/1 "2017-08-30T16:15:59Z")

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Hello . Greetings to all group members. I have a confusion about mysql db configuration , can anyone help me please ? I have a VPS server with 50 GB ram garantee. On this server we installed Plesk Onyx. Than open 3 account for 3 customers. Now I have to setup .cnf file. Talking about innodb\_buffer\_pool\_size 80% of ram is the raccomanded size. But haviving 3 database instances under plesk and 3 .cnf file… I have to be sure that the sum of every innodb\_buffer\_pool\_size do not exceed 80% ? I mean DB1 40% DB2 20% DB3 20 % … or what other.?? Thanks a lot for every answer.