Server System Variables Scope Global Dynamic No SET_VAR  Hint Applies No Type String System Variable version_compile_machine Scope Global Dynamic No SET_VAR  Hint Applies No Type String System Variable version_compile_os Scope Global Dynamic No SET_VAR  Hint Applies No Type String System Variable version_compile_zlib Scope Global Dynamic No SET_VAR  Hint Applies No Type String Command-Line Format --wait-timeout=# System Variable wait_timeout Scope Global, Session Dynamic Yes SET_VAR  Hint Applies No 915 • wait_timeout • version_compile_zlib • version_compile_os • version_compile_machine The  CMake  configuration program has a  COMPILATION_COMMENT_SERVER  option that permits a comment to be specified when building MySQL. This variable contains the value of that comment. (Prior to MySQL 8.0.14,  version_comment  is set by the  COMPILATION_COMMENT  option.) See Section 2.9.7, “MySQL Source-Configuration Options” . The type of the server binary. The type of operating system on which MySQL was built. The version of the compiled-in  zlib  library.