The Error Log occurs frequently but is not of interest, it can be suppressed.  log_error_suppression_list  does not suppress messages with a priority of  ERROR  or  SYSTEM . The  log_error_suppression_list  value may be the empty string for no suppression, or a list of one or more comma-separated values indicating the error codes to suppress. Error codes may be specified in symbolic or numeric form. A numeric code may be specified with or without the  MY-  prefix. Leading zeros in the numeric part are not significant. Examples of permitted code formats: For readability and portability, symbolic values are preferable to numeric values. Although codes to be suppressed can be expressed in symbolic or numeric form, the numeric value of each code must be in a permitted range: ER_SERVER_SHUTDOWN_COMPLETE MY-000031 000031 MY-31 31 •1 to 999: Global error codes that are used by the server as well as by clients. •10000 and higher: Server error codes intended to be written to the error log (not sent to clients). In addition, each error code specified must actually be used by MySQL. Attempts to specify a code not within a permitted range or within a permitted range but not used by MySQL produce an error and the log_error_suppression_list  value remains unchanged. For information about error code ranges and the error symbols and numbers defined within each range, see Section B.1, “Error Message Sources and Elements” , and MySQL 8.0 Error Message Reference. The server can generate messages for a given error code at differing priorities, so suppression of a message associated with an error code listed in  log_error_suppression_list  depends on its priority. Suppose that the variable has a value of  ’ER_PARSER_TRACE,MY-010001,10002’ . Then log_error_suppression_list  has these effects on messages for those codes: The effect of  log_error_verbosity  combines with that of  log_error_suppression_list . Consider a server started with these settings: •Messages generated with a priority of  WARNING  or  INFORMATION  are suppressed. •Messages generated with a priority of  ERROR  or  SYSTEM  are not suppressed. Verbosity and Suppression-List Interaction [mysqld] log_error_verbosity=2 # error and warning messages only log_error_suppression_list=’ER_PARSER_TRACE,MY-010001,10002’ In this case,  log_error_verbosity  permits messages with  ERROR  or  WARNING  priority and discards messages with  INFORMATION  priority. Of the nondiscarded messages,  log_error_suppression_list discards messages with  WARNING  priority and any of the named error codes. The  log_error_verbosity  value of 2 shown in the example is also its default value, so the effect of this variable on  INFORMATION  messages is as just described by default, without an explicit setting. You must set  log_error_verbosity to 3 if you want  log_error_suppression_list  to affect messages with INFORMATION  priority. Note 1034