Server Status Variables connection process (even before an IP address is known), or are not specific to any particular IP address (such as out-of-memory conditions). The number of errors that occurred during calls to  accept()  on the listening port. The number of connections refused due to internal errors in the server, such as failure to start a new thread or an out-of-memory condition. The number of connections refused because the server  max_connections  limit was reached. The number of errors that occurred while searching for connecting client IP addresses. The number of errors that occurred during calls to  select()  or  poll()  on the listening port. (Failure of this operation does not necessarily means a client connection was rejected.) The number of connections refused by the  libwrap  library. The number of connection attempts (successful or not) to the MySQL server. The number of internal on-disk temporary tables created by the server while executing statements. You can compare the number of internal on-disk temporary tables created to the total number of internal temporary tables created by comparing  Created_tmp_disk_tables  and  Created_tmp_tables values. Due to a known limitation,  Created_tmp_disk_tables  does not count on-disk temporary tables created in memory-mapped files. By default, the TempTable storage engine overflow mechanism creates internal temporary tables in memory- mapped files. This behavior is controlled by the  temptable_use_mmap  variable, which is enabled by default. See also Section 8.4.4, “Internal Temporary Table Use in MySQL” . How many temporary files  mysqld  has created. The number of internal temporary tables created by the server while executing statements. 951 • Created_tmp_tables • Created_tmp_files Note • Created_tmp_disk_tables • Connections • Connection_errors_tcpwrap • Connection_errors_select • Connection_errors_peer_address • Connection_errors_max_connections • Connection_errors_internal • Connection_errors_accept