SQL Server creates and maintains statistics for temporary tables, which lead to better cardinality estimation and optimal execution plan generation. Table variables have no statistics, which can result in...
2016-05-15
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When it comes to lock waits, one of the important information we need to know is which statement waited for locks and how long. This is possible with extended...
2016-05-15
122 reads
Query Post Execution Showplan event is a very useful event to find problematic queries and execution plans based on CPU usage or duration while analyzing performance issues. It can...
2016-05-15
55 reads
In SQL Server, Filtered Statistics can improve cardinality estimation, i.e. when joining lookup table, or while joining fact table and dimension table. For this reason, SQL Server supports the...
2016-05-15
12 reads
Starting SQL Server 2014, it is possible to use memory optimized table variables. These are table variables declared using a table type which is memory optimized. Memory optimized table...
2016-05-15
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SQL Server configuration parameter “optimized for ad hoc workloads” can be very useful when you execute lots of single use ad hoc statements or dynamic SQL statements by reducing...
2016-05-15
22 reads
In SQL Server, concurrent writes or read / write to the same page can lead to PAGELATCH (like PAGELATCH_EX and PAGELATCH_SH) waits or what is knowns as PAGELATCH contention....
2016-05-15
38 reads
In SQL Server, for insert into select statements, when the target for insert into is temporary table, the select statement can execute in parallel. When the target is table...
2016-05-15
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When SQL Server has a choice of plans, it will compare the cost among a set of execution plans and will choose the cheapest one. In some cases, even...
2016-05-15
30 reads
SQL Server caches temporary objects (temporary tables and table variables), that are created in a stored procedure. Temporary objects that are created either in dynamic SQL statement or by...
2016-05-15
70 reads
Every PostgreSQL migration eventually hits the same fork in the road. The database is...
By Steve Jones
I’m off on vacation today. Which is a little weird as I just got...
By Arun Sirpal
Every DBA has a box like this. Sitting untouched for months. Nobody’s proud of...
WA:08218154393 Gedung C3 Lt. 1-3 Komplek, Jl. Puri Indah Raya No.1-3 Blk 02, RT.3/RW.2,...
WA:08218154393 Jl. Wolter Monginsidi No.54, RT.2/RW.4, Petogogan, Kec. Kby. Baru, Kota Jakarta Selatan, Daerah...
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