Mikhail Gorbachev's policies of glasnost and perestroika had profound and unintended effects on the Soviet Union. In fact, many historians suggest these reforms led directly to the fall of communism and the breakup of the Soviet Union.
In SQL Server, you create a surrogate key by assigning an identity property to a column that has a number data type. A natural key is a naturally occurring descriptor of the data and one of a table's attributes that has no duplicate values. When you use a natural key as a table's primary key, each of the table's rows is uniquely identified.
Non-buffer latches. Non-buffer latches are designed to protect and guarantee any physical memory structure other than pages stored in the buffer pool. SQL Server will use LATCH_XX wait types to report when a process is waiting for on a SQL Server buffer latch to be released. Non-buffer latches are not often encountered during, and thus those are the least documented, but here are some use cases that can lead to SQL Server contention with non-buffer latches: Excessive parallelism â In a situation when a high level of parallelism is used on servers with 12+ logical processors, most if not all, queries can qualify to use parallel execution plans. In such a situation, non-buffered latches (LATCH_XX) will be acquired in memory to ensure the synchronization of ...