Beware of the performance penalty involved with unchecked use of logging options. In my case, although I was using the buffered cursor, sqlsrv_fetch_array was running too slowly. The solution was to remove my lavish use of those configuration options (using both SQLSRV_LOG_SYSTEM_ALL and SQLSRV_LOG_SEVERITY_ALL).
(No version information available, might only be in SVN)
sqlsrv_configure — Changes the driver error handling and logging configurations
Changes the driver error handling and logging configurations.
The name of the setting to set. The possible values are "WarningsReturnAsErrors", "LogSubsystems", and "LogSeverity".
The value of the specified setting. The following table shows possible values:
Error and Logging Setting Options Setting Options WarningsReturnAsErrors 1 (
TRUE) or 0 (
LogSubsystems SQLSRV_LOG_SYSTEM_ALL (-1) SQLSRV_LOG_SYSTEM_CONN (2) SQLSRV_LOG_SYSTEM_INIT (1) SQLSRV_LOG_SYSTEM_OFF (0) SQLSRV_LOG_SYSTEM_STMT (4) SQLSRV_LOG_SYSTEM_UTIL (8) LogSeverity SQLSRV_LOG_SEVERITY_ALL (-1) SQLSRV_LOG_SEVERITY_ERROR (1) SQLSRV_LOG_SEVERITY_NOTICE (4) SQLSRV_LOG_SEVERITY_WARNING (2)
TRUE on success or
FALSE on failure.