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If an attempt is made to modify a data page while latch enforcement is set, it causes an exception and creates a mini-dump in SQL Server installation's LOG directory.

Microsoft support can examine the contents of such mini-dump to determine the cause of the exception.

This page auditing goes someway to catching this – especially on non-Enterprise Edition systems that don't have the 'checksum sniffer'. SQL Server 8 (with service pack 4) and SQL Server 9 can perform latch enforcement for data pages found in the buffer pool cache.

Latch enforcement changes the virtual memory protection state while database page status changes from "clean" to "dirty" ("dirty" means modified through INSERT, UPDATE or DELETE operation).

In order to modify the data page the connection must first acquire a modification latch.

Once the data modification latch is acquired the page protection is changed to read-write.

One can also use SET FORCEPLAN ON to disable the costing of pseudo-merge joins because the query is forced to use the order specified in the FROM clause. A ghost record is the result of a delete operation.Disables checking for allowed interim constraint violations.By default, SQL Server checks for and allows interim constraint violations.Applies only to 64-bit versions & you should have the Lock pages in memory right granted to turn this on. You can use trace flag 836 to reduce the number of buffer descriptors that are allocated at startup in 32-bit AWE mode. KB 920093 SQL 9 – When trace turned on, SQL Server can perform larger I/O extent reads to populate the buffer pool when SQL Server starts this populates the buffer pool faster. Sort=Most Useful&Page Index=1 & allocations in temp DB from 1pg at a time (for first 8 pages) to one extent. When a new temp table is created on a cold system it uses the same mechanism as for SQL 8.It may prevent the server from starting if memory is fragmented and large pages cannot be allocated. Additionally, the larger I/O extent reads improve the initial query compilation and the response time when SQL Server starts. When it is dropped though, instead of all the pages being deallocated completely, one IAM page & one data page are left allocated, then the temp table is put into a special cache.