Prometheus exporter for Microsoft SQL Server (MSSQL). Exposes the following metrics
mssql_instance_local_time Number of seconds since epoch on local instance
mssql_connections{database,state} Number of active connections
mssql_deadlocks Number of lock requests per second that resulted in a deadlock since last restart
mssql_user_errors Number of user errors/sec since last restart
mssql_kill_connection_errors Number of kill connection errors/sec since last restart
mssql_database_state{database} State of each database (0=online 1=restoring 2=recovering 3=recovery pending 4=suspect 5=emergency 6=offline 7=copying 10=offline secondary)
mssql_log_growths{database} Total number of times the transaction log for the database has been expanded last restart
mssql_database_filesize{database,logicalname,type,filename} Physical sizes of files used by database in KB, their names and types (0=rows, 1=log, 2=filestream,3=n/a 4=fulltext(prior to version 2008 of MS SQL Server))
mssql_page_life_expectancy Indicates the minimum number of seconds a page will stay in the buffer pool on this node without references. The traditional advice from Microsoft used to be that the PLE should remain above 300 seconds
mssql_io_stall{database,type} Wait time (ms) of stall since last restart
mssql_io_stall_total{database} Wait time (ms) of stall since last restart
mssql_batch_requests Number of Transact-SQL command batches received per second. This statistic is affected by all constraints (such as I/O, number of users, cachesize, complexity of requests, and so on). High batch requests mean good throughput
mssql_page_fault_count Number of page faults since last restart
mssql_memory_utilization_percentage Percentage of memory utilization
mssql_total_physical_memory_kb Total physical memory in KB
mssql_available_physical_memory_kb Available physical memory in KB
mssql_total_page_file_kb Total page file in KB
mssql_available_page_file_kb Available page file in KB
Please feel free to submit other interesting metrics to include.