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A special thanks to Daniel Jones [firstname.lastname@example.org] for showing up interest and writing informative article for our blog (http://mssqlfun.com/). Always on\Database Mirroring Automatic Page Repair One of the most useful as well as hottest feature in SQL Server is mirroring of database. It is helpful for numerous of organizations that implements the successful as … Continue reading
Scenario: DBA found that tempdDBdatabase usage is getting high and most of the size is consumed by row versioning. DBA raised the issue with application team running that query. Once Application team close the session, tempDB usage comes normal. Question: Application tea raise concern “How can a select statement on table consume huge amount of … Continue reading
Restricting user to login from single host may be sometimes required from security point and other business requirements. We can achieve it through SERVER LEVEL LOGON TRIGGER. ALTER TRIGGER TR_CHECK_LOGIN_TEST_HOST ON ALL SERVER FOR LOGON AS BEGIN DECLARE @HOSTNAME VARCHAR(48) DECLARE @PROGNAME VARCHAR(100) SELECT @HOSTNAME = HOST_NAME FROM SYS.DM_EXEC_SESSIONS WHERE SESSION_ID = @@SPID IF ORIGINAL_LOGIN() … Continue reading
Windows Cluster Service use the “heartbeat” process to check whether each node is alive at both the OS level and SQL Server level. Heartbeat signals works on UDP. Microsoft Windows Cluster service perform 2 health checks to perform node & resource availability check. LooksAlive Health Check 1) LooksAlive is a quick lightweight health check 2) … Continue reading
Some days back, I received one query on my facebook page that user want to create Database Snapshot frequently & want to delete the oldest with same frequency. Quite interesting scenario. I did not go in deep why he has such requirement but I am clear that It can be done very easily. So let’s … Continue reading