Question : I’ve been investigating some databases using the dm_db_missing_index_group_stats DMV, and have a question about the equality_columns field in […]
Index vs Statistics [duplicate]
Question : This question already has answers here: When is it better to create STATISTICS instead of creating an Index? […]
Analyzing TCB Index Status for DB2
Question : The Following is the TCB index that I could get using a command for my DB2 database. I […]
Question : We had an issue earlier on in the week whereby a query had horribly regressed and as a […]
Ola Hallengren Index Script not Reindexing
Question : First, I realize a similar question was asked and the poster had page count set to 1000 for […]
How to update the statistics of an index that has just been reorganized, both with IndexOptimize script
Question : I would like to know if we can update the statistics of an index that has been reorganized, […]
Do frequent DML operations on a table with indexes and huge data affect SELECT query performance?
Question : If I have frequent DML(insert,update,delete) operations on a table with huge data with clustered and non-clustered indexes. Will […]
MySQL status variable Handler_read_rnd_next is growing a lot
Question : In MYSQL status, Handler_read_rnd_next value is very high. I am aware that, this value will be incremented when […]
calculating the total number of rows in a table – fails when it is a heap – is there any fix?
Question : I have a procedure that I use to find out how big is a table. select * from […]
Are idx_scan statistics reset automatically (default)?
Question : I was looking at the tables (pg_stat_user_indexes and pg_stat_user_tables) and discovered many indices that are not being used. […]