Article ID: 111915, created on Aug 17, 2011, last review on Aug 12, 2014

  • Applies to:
  • Plesk 10.3 for Linux/Unix
  • Plesk 10.2 for Linux/Unix


I have Parallels Plesk Panel with the Customer & Business Manager component. When I try to turn on the VPS-Optimized mode using a command-line,
# /usr/local/psa/bin/vps_optimized --turn-on
, I receive the error below.

"ERROR while trying to execute SQL query, the query was: ALTER TABLE billing.batch_file_transactions ENGINE=MYISAM Check the error reason(see log file: /tmp/vps-optimized-mysql-innodb.f26152), fix and try again".


It is not possible to turn the VPS-Optimized mode off, because the Customer & Business Manager database cannot be switched to the MyISAM engine. We recommend that you either use the Shared Hosting mode, or remove the Customer & Business Manager component using the instructions in this article.

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