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// SPDX-License-Identifier: GPL-3.0-or-later
package mysql
const (
queryShowGlobalVariables = `
SHOW GLOBAL VARIABLES
WHERE
Variable_name LIKE 'max_connections'
OR Variable_name LIKE 'table_open_cache'
OR Variable_name LIKE 'disabled_storage_engines'
OR Variable_name LIKE 'log_bin'
OR Variable_name LIKE 'performance_schema';`
)
func (m *MySQL) collectGlobalVariables() error {
// MariaDB: https://mariadb.com/kb/en/server-system-variables/
// MySQL: https://dev.mysql.com/doc/refman/8.0/en/server-system-variable-reference.html
q := queryShowGlobalVariables
m.Debugf("executing query: '%s'", q)
var name string
_, err := m.collectQuery(q, func(column, value string, _ bool) {
switch column {
case "Variable_name":
name = value
case "Value":
switch name {
case "disabled_storage_engines":
m.varDisabledStorageEngine = value
case "log_bin":
m.varLogBin = value
case "max_connections":
m.varMaxConns = parseInt(value)
case "performance_schema":
m.varPerformanceSchema = value
case "table_open_cache":
m.varTableOpenCache = parseInt(value)
}
}
})
return err
}
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