database engine

Most times, the limits put on data in a database is a function of the database engine and how much data it can safely support.

After SQL Native Client is installed on a client computer, the client is immediately ready to connect to an instance of the Database Engine.

A SQL Server Agent condition that defines how much CPU usage by the SQL Server Database Engine constitutes an idle state.

SQLite's utilization of a virtual machine, the Virtual Database Engine (VDBE), makes it easy to debug, modify, and extend SQLite's core.

Database Engine Tuning Advisor does not support using a trace table to which trace events are still being written as a workload.

Instances of the Database Engine can be configured with HTTP endpoints or addresses to which SOAP requests can be sent from applications.

A transaction within a single instance of the Database Engine that spans two or more databases is actually a distributed transaction.

A Database Engine Tuning Advisor graphical user interface (GUI) tool, which makes it easy to view tuning sessions and results.

The Database Engine Tuning Advisor GUI makes it easy to view existing tuning sessions tuning recommendations.

IDS is a powerful database engine. OAT provides an easy to use GUI to monitor IDS and makes the job of a DBA much easier.

If such a message is present in the tuning log, Database Engine Tuning Advisor was unable to tune the entire workload.

On the "Surface Area Configuration for Services and Connections" page, expand Database Engine tree, click Remote Connections .

On the "Surface Area Configuration for Services and Connections" page, expand Database Engine , then click Service .

Then use the -d option to specify to which database in the list you want the Database Engine Tuning Advisor to connect first.

In the Connection Properties dialog box, in the Server name box, type the name of your instance of the Database Engine.

SQLite is an embeddable SQL database engine and is not a client library used to connect to a big database server (like MySQL or PostgreSQL).

The Database Engine automatically analyzes the body of Transact-SQL functions and evaluates whether the function is deterministic.

The Database Engine automatically analyzes the body of Transact-SQL functions and evaluates whether the function performs data access.

Generally, the Database Engine must be able to unambiguously trace modifications from the view definition to one base table.

To work with a firewall, the instance of the Database Engine must listen on the network address that the firewall is configured to forward.

This Warning event indicates that the database engine is unable to read the log file header specified in the event description.

In most cases, the Database Engine delivers the best performance when operating with its default settings for locking and lock escalation.

Text box, select or enter the name of the Database Engine instance where you want to store Notification Services data for this tutorial.

A data retrieval operation where the Database Engine must read all the pages in a table to find the rows that qualify for a query.

For each statement that does not meet the requirements for a query notification, the Database Engine immediately creates a notification.

When a size is not supplied for the primary file, the Database Engine uses the size of the primary file in the model database.

It is possible to completely avoid use of a workload file when you use XML input with Database Engine Tuning Advisor.

Parameter must be the name of the Database Engine instance you are connected to in Object Explorer.

The Database Engine applies logging and locking optimizations when it is possible.

This Warning event indicates that the log version stamp of a log file does not match the database engine version stamp.

The login name must exactly match the name of an existing login in the instance of the Database Engine.

Database Engine Tuning Advisor enables you to tune databases, manage tuning sessions, and view tuning recommendations.

You can use operating system counters to help you understand how components outside of the database engine affect your data server.

Which subset of existing physical design structures in the database must be part of the Database Engine Tuning Advisor recommendation?

Before client computers can connect to the Database Engine, the server must be listening on an enabled protocol.

The user account used to run Setup must have permission to access and create databases using the local Database Engine instance.

After a deadlock is detected, the Database Engine ends a deadlock by choosing one of the threads as a deadlock victim.

On first use, Database Engine Tuning Advisor must be started by a user with system administrator permissions to initialize the application.

Before analysis can begin, Database Engine Tuning Advisor prompts you to create a unique name or number to identity the tuning session.

Unlike other database files, this file is only kept open by the Database Engine during active restore operations.

This value has no effect on queries received by the Database Engine.

Specifies an instance of the Database Engine to act as the witness server for a database mirroring session.

Dynamic management views provide information about the current state of an instance of the Database Engine.

You can use the Database Engine Tuning Advisor GUI to import a user-specified configuration into a tuning session.

Whether or not it is embedded, the database engine supports multiple simultaneous connections and access from multiple application threads.

The maximum time is the number of hours and minutes that you want Database Engine Tuning Advisor to spend on analysis of a workload.

With a professional database solution, the problems of locking and corruption are resolved by the database engine.

A number of database manufacturers have made encryption functions available as part of the database engine.

Element, specify what physical design structures you want Database Engine Tuning Advisor to consider during the tuning session.

The code executes on the Database Engine in the same way and with the same permissions, regardless of how you submit the code statements.

The log contains information about workload events that Database Engine Tuning Advisor was unable to analyze.

The following illustration shows the relationships among the Database Engine permissions hierarchies.

How the Database Engine handles parallelized user- defined functions , aggregates, and user- defined type (UDT) methods .

Installation requires a local Database Engine instance and a system configuration that uses default values.

When the number of locks in an instance of the Database Engine exceeds memory or configuration thresholds.

Command-line utility. During the tuning session, Database Engine Tuning Advisor runs the specified workload against the databases.

String summary information is not maintained if the summary for a column sample is larger than the Database Engine can maintain.

Is the Database Engine instance on which to create the instance and application databases.

The open source Derby database engine provides developers with a powerful new tool for lightweight database development.

The Database Engine Tuning Advisor can recommend indexes, indexed views, or partitioning on any of the databases in the workload.

Table scans used to read data pages are very efficient in the Database Engine.

More recently it is being used as a prototyping tool, a research tool, and a light weight back end database engine.

Element can be specified in the XML input file to force Database Engine Tuning Advisor to ignore all constants in a workload.

Database Engine Tuning Advisor allows you to specify a greater variety of tuning options.

The name of the Database-Engine instance that performed the backup operation.

The Database Engine now dynamically manages the size of its memory pool when using AWE memory to support large databases.

When requests come to the system, the database engine can buffer data in memory, so that it does not have to access the disk constantly.

The name of the instance of the Database Engine that performed the backup operation.

The database engine will not allow recovery to complete for this instance until the missing database is reinstated.

Number option creates more values than are needed for a useful sample, the Database Engine tries to match the requested sample amount.

Focuses on quickly familiarizing a database administrator with the installation and maintenance of instances of the Database Engine.

This tutorial assumes that this database is located in the default instance of SQL Server Database Engine installed on your local computer.

Provides sample code and sample applications for the Database Engine, Analysis Services, Reporting Services, and Integration Services.

The schema can be imported later into the database engine and converted to the real thing in a matter of minutes.

However, within a Notification Services instance, the Database Engine version and Notification Services version must match.

The database engine will not permit recovery to complete for this instance until the missing database is re-instated.

The Database Engine instance cannot be installed as a virtual server.

Users can specify a set of databases to tune, and Database Engine Tuning Advisor makes recommendations for all selected databases.

Database Engine Tuning Advisor analyzes the effects of a workload against a database or multiple databases.

In SQL Server 2005, Database Engine Tuning Advisor allows you to specify a tuning time, or to specify an unlimited tuning time.

When a unique index exists, the Database Engine checks for duplicate values each time data is added by a insert operations.

If the Database Engine Tuning Advisor does not tune an event, the event is written to a tuning log.

If the system is low on memory, the Database Engine can remove the execution plan and drop the associated work tables.

Insert operations that would generate duplicate key values are rolled back, and the Database Engine displays an error message.

Continuous availability demands that the database engine be available for processing with no perceivable downtime.

The Database Engine can be configured to require encryption when communicating with client applications.

Specifies that the Database Engine should not automatically recompute statistics.

Indicates that the Database Engine does not cache a plan for this procedure and the procedure is compiled at run time.

This occurs because Database Engine Tuning Advisor often needs to make several calls to the query optimizer during the tuning process.

When Absolute is specified, Database Engine Tuning Advisor does not consider the existing configuration.

To determine which partitioning method is best, the administrator can use Database Engine Tuning Advisor to tune the workload twice.

When this element is specified, indexed views that Database Engine Tuning Advisor may recommend will not contain selection conditions.

The Database Engine merges the sorted runs of index leaf rows into a single, sorted stream.

They only have to validate the data if the Database Engine notifies them of a change.

If the required network protocol is not available and configured on server, Database Engine will not start.

The following example displays information about all locks currently held in an instance of the Database Engine.

Indicates that the Database Engine encrypts the catalog view columns that contains the text of the ALTER FUNCTION statement.

To ensure consistent results between the Database Engine and Analysis Services, use Windows collations.

To help improve Database Engine security, most network protocols are off by default.

However, when the stored procedure is activated by the Database Engine, the database settings and security context may be different.

The Database Engine re-examines the optimal number of thread decisions every time an execution plan is retrieved from the procedure cache.

The main work of this thesis consists: 1. Bring forward the architecture of content-based multimedia database engine.

Every database engine has its own characteristics and usually there is a need for a platform specific SQL tuning.

Option to set the maximum number of available locks, thereby limiting the amount of memory the Database Engine uses for them.

If this option is specified, the Database Engine continues to use previously created (old) statistics, even as the data changes.

This value applies to an outgoing connection initiated by the Database Engine as a remote query.

You can check that no database-engine dependent functions can be found in the data access layer, making it database-independent.

These client sessions must be on the same instance of the Database Engine from which the binding token was obtained.

When configured as described above, the Derby database engine blurs the distinction between the Server tier and the EIS tier.

HSQLDB is an open source, lightweight, pure-Java SQL database engine, licensed under a BSD-style license.

Database Engine Tuning Advisor evaluates more types of events and structures, and provides higher quality recommendations.

In the TCP Port box, type the ports that you want the Database Engine to listen on, separated by commas.

The Database Engine automatically creates a unique index to enforce the uniqueness requirement of the PRIMARY KEY constraint.

Setup creates the report server database using a local Database Engine instance, and configures a report server to use default values.

You can view the log during the tuning session to determine whether Database Engine Tuning Advisor can tune the events in your workload.

Used to start and stop an instance of Database Engine from the command prompt for troubleshooting.

In certain cases, the Database Engine may opt to alter the deadlock priority for a short duration to achieve better concurrency.

The overhead results from the many calls made by Database Engine Tuning Advisor to the query optimizer during the tuning process.

The Database Engine automatically creates a UNIQUE index to enforce the uniqueness requirement of the UNIQUE constraint.

When using a trace table as a workload, that table must exist on the same server where Database Engine Tuning Advisor is tuning.

When a secondary data file or log file is specified but size is not specified for the file, the Database Engine makes the file 1 MB.

Incomplete pages cannot be detected by the Database Engine.

This option specifies the maximum time the Database Engine should use to recover a database during a system restart .

Unless MS DTC is currently installed on the computer running the instance of the Database Engine, this example produces an error message.

The sample application embeds the database engine, Derby, and the servlet container, Jetty, within the application.

This topic contains cause and resolution information for a number of errors related to the Database Engine.

The servlet creates an instance of an application class that boots the Derby database engine and creates a Derby database.

This means that even if the vendor's code traps, the database engine will not go down (obviously the backup operation itself will fail).

Only the Database Engine and Analysis Services provide options for configuring remote connectivity.

If Database Engine Tuning Advisor used this constant, it may not produce an effective tuning recommendation.

"Dynamic" means that the query is sent into the database engine as a string; it must be parsed and have a query execution plan generated.

The Database Engine Tuning Advisor XML schema provides more flexibility to set tuning options.

For more information about schema binding, see Creating User-defined Functions (Database Engine) and Designing and Implementing Views.

Connect to the instance of the Database Engine where you want to store data for the instance of Notification Services.

If the test and production server hardware are not identical, the Database Engine Tuning Advisor recommendation quality is diminished.

The Database Engine does not escalate row or key- range locks to page locks , but escalates them directly to table locks .

Database Engine Tuning Advisor tunes a database on a production server by offloading most of the tuning load onto a test server.

The following sections describe the options that are available with the two different Database Engine Tuning Advisor interfaces.

Database Engine Tuning Advisor could take several days to complete a thorough analysis on a workload that contains hundreds of events.

Database Engine Tuning Advisor provides recommendations to add, remove, or modify indexes, indexed views, and partitioning.

If the primary data file being attached is read-only, the Database Engine assumes that the database is read-only.

When a database receives a statement, the database engine first parses that statement and looks for syntax errors.

Isolated types of information can be stored separately, but the database engine can combine data when it is required.

The Database Engine chooses the appropriate lock and can escalate the lock from a row or page lock to a table lock.

Whenever the number of locks is greater than the memory threshold for lock escalation, the Database Engine triggers lock escalation.

Managed code runs in a common language runtime environment hosted by the database engine.

To determine what is actually causing Database Engine Tuning Advisor to generate many drop recommendations, review the tuning log messages.

Make sure that tracing has stopped before using a trace table as a workload for Database Engine Tuning Advisor.

Database Engine Tuning Advisor does not copy actual data from the production server to the test server.

The shared memory protocol is also available if the client is connecting to an instance of the Database Engine on the same computer.

To develop effective data applications for devices, you need an understanding of good database design and of the SQL Server database engine.

The compatibility setting also determines the keywords that are reserved by the Database Engine.

After tuning the workload on the test server, Database Engine Tuning Advisor uses these hardware properties to generate a recommendation.

Use the Database Engine to create relational databases for online transaction processing or online analytical processing data.

The Database Engine uses these persisted values when it creates an index on the column, and when the index is referenced in a query.

Database Engine Tuning Advisor analyzes the performance effects of Transact-SQL statements executed against databases you want to tune.

Contains information about each type of analysis report that Database Engine Tuning Advisor generates after consuming a workload.

The Database Engine must be installed concurrently with the report server instance.

In most cases, the application connection to the instance of the Database Engine may also terminate.

On the User Instances page, specify if you want to generate a separate instance of the Database Engine for non-administrator users.

Cumulative number of times the Database Engine tried to escalate locks.

The Database Engine does not automatically generate values for the column.

Simply making the database engine highly available does not necessarily create a HA solution.

The ID is created automatically by the database engine and increments automatically, guaranteeing a unique ID.

These are the primary mechanisms used to control transactions in a Database Engine application.

The Model layer includes the Derby database engine, consisting of a single . jar file, derby. jar.

When Scott executes the stored procedure, the Database Engine verifies that he (the caller) has permission to execute the stored procedure.

If the compatibility level is less than or equal to 65, the Database Engine interprets empty strings as single spaces.

Are keywords that indicate that optimizer hints are used to customize the way the Database Engine processes the statement.

Provides a guide to all of the technologies and languages needed to implement Database Engine solutions.

The Database Engine uses intent locks to protect placing a shared (S) lock or exclusive (X) lock on a resource lower in the lock hierarchy.

For this failure, the Database Engine returns an error to the application, the Windows event log, and the Database Engine error log.

The dynamic lock pool does not acquire more than 60 percent of the memory allocated to the Database Engine.

The Database Engine first scans the data pages of the base table to retrieve key values and builds an index leaf row for each data row.

For more information, see Using Multiple Active Result Sets (MARS) or Distributed Transactions (Database Engine).

Deep integration between Notification Services and the Database Engine provides scalable and reliable operation.

Database Engine Tuning Advisor will tune the new workload because login information is not specified in the trace.

By contrast, reconfiguring the running value of the fill factor option requires restarting the Database Engine.

After Database Engine Tuning Advisor finishes tuning the test server shell database, it generates a tuning recommendation.

Opens the Database Engine Tuning Advisor, and provides the selected syntax as the workload for analysis.

In addition to limiting the Database Engine Tuning Advisor execution time, you can tune only a subset of the tables in the database.

The Database Engine chooses the size of the virtual log files dynamically while it is creating or extending log files.

An expression for which the Database Engine can no longer guarantee the data integrity of the index.

By default, the Object Explorer Details page is displayed, connected to the instance of Database Engine on the current computer.

The errors from these components are returned to the calling application using the same basic mechanism as errors from the Database Engine.

For more information about event notifications, see Event Notifications (Database Engine).

Then, you need to determine which Database Engine Tuning Advisor user interface best suits your tuning needs and your skill level.

You can control the number of events in workloads that are tuned by Database Engine Tuning Advisor.

Database Engine Tuning Advisor may also suggest unpartitioned indexes as part of the recommendation.

Indicates whether the underlying database engine computes new statistics when the index is created.

Database Engine Tuning Advisor cannot tune the workload within the specified time limit.

Database administrators can use Database Engine Tuning Advisor to perform exploratory analysis.

Notification Services instances frequently connects to the Database Engine.

Runs out of space, the Database Engine forces the version stores to shrink.

Server memory options are updated dynamically in the Database Engine; therefore, you can change them without restarting the server.

Database Engine Tuning Advisor uses trace files, trace tables, or Transact-SQL scripts as workload input when tuning databases.

The SMO object model provides classes for configuring and managing instances of the Database Engine.

They are not considered by the Database Engine when calculating the number of index key columns or index key size.

Some error messages can be raised at multiple points in the code for the Database Engine.

A performance test shows the efficiency of database query is improved by the incremental database engine.

Database Engine Tuning Advisor attempts to recommend physical design structures that can be created online when possible.

The Database Engine Tuning Advisor GUI and the command-line utility can use this Transact-SQL script as a workload.

Column reflects the fact that the Database Engine has defaulted to dynamic memory rather than use a setting that is not valid.

An application that starts a transaction and does not commit it or roll it back prevents the Database Engine from advancing the MinLSN.

Using db2pdcfg, the database engine has now been configured to call the db2cos script each time a locktimeout occurs.

The name of the Database Engine instance.

The Database Engine does not dynamically keep the specified percentage of empty space in the pages.

Database Engine Tuning Advisor imports metadata from the production database to the test server shell database.

During the tuning process, Database Engine Tuning Advisor creates a shell database on the test server.

If restarting the instance of the Database Engine does not correct the problem, then the problem is on the disk.

Specifies that optimizer hints are used to customize the way the Database Engine processes the statement.

When the Database Engine Tuning Advisor tunes databases, it creates summaries, recommendations, reports, and tuning logs.

The Database Engine sp_help stored procedures might return only a subset of rows, or NULL.

The following table lists some of the more common types of administrators and the way they interact with the Database Engine.

Apache Derby is a high quality, pure-Java embedded relational database engine that IBM recently contributed to the open source community.

This Information event indicates that the database engine is initiating recovery steps.

Database Engine Tuning Advisor may recommend other indexes and indexed views that are also aligned.

If you would like Database Engine Tuning Advisor to tune a workload for an unlimited amount of time, specify 0 (zero) with the -A option.

A new kind of object, event notifications, can be programmed in the Database Engine.

If you are planning to do your development work on the same computer as the Database Engine, you are finished.

This restriction allows the Database Engine to verify uniqueness of key values within a single partition only.

On the Protocol tab, in the Pipe Name box, type the pipe you want the Database Engine to listen on, and then click OK.

Contains information about the different ways you can implement Database Engine Tuning Advisor recommendations.

To instruct the Database Engine to discard plans for individual queries inside a stored procedure, use the RECOMPILE query hint.

The Database Engine stores the application data and performs the matching between events and subscriptions.

The ODBC SQLSTATE has nothing to do with the state attribute of Database Engine error messages.

For more information about concurrency in cursors, see Cursor Concurrency (Database Engine).

The maximum amount of time that the Database Engine should require to recover a database.

Provides assistance relative to troubleshooting the Database Engine.

The following sections contain conceptual information about using both user interfaces of Database Engine Tuning Advisor.

Database Engine Tuning Advisor does not tune other types of trace events.

A logical read occurs every time the Database Engine requests a page from the buffer cache.

Then, the Database Engine and SQL Native Client automatically use the appropriate protocol settings.

You cannot install Analysis Services to the same cluster group as the Database Engine.

Changed installation location for the Database Engine Tuning Advisor XML schema.

The Database Engine schedules one set of read requests for pages after 100, 001, and passes the rows from each page back to both scans.

You can identify when Database Engine transactions start and end with Transact-SQL statements or API functions and methods.

When either option is enabled for a database, the Database Engine maintains versions of each row that is modified.

The statistics are not automatically updated and maintained by the Database Engine.

When a batch finishes running, the Database Engine rolls back any active uncommittable transactions.

Specifies that the Database Engine not read rows that are locked by other transactions.

NET database engine conjunction application procedure and database.

Database Engine Tuning Advisor can also recommend partitioning when appropriate to improve performance and manageability of large tables.

Upgrading the report server database does not upgrade the Database Engine that hosts it.

The Database Engine supports a performance optimization mechanism called read-ahead.

All of the resources listed in the section above participate in the Database Engine deadlock detection scheme.

Forces the Database Engine to load the default value defined for a column.

Database Engine Tuning Advisor helps create optimal sets of indexes, indexed views, and partitions.

Total number of milliseconds the Database Engine waited on a page lock.

Using this process minimizes the performance impact created by Database Engine Tuning Advisor.