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Sybase 12.4.2 manual Xvi

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Sybase 12.4.2 manual Xvi

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Administration and Performance Guide Adaptive Server IQDocument ID Contents Contents 100 101103 104Contents Deleting views 131 Views in the system tables 132135 138Vii Viii Using cursors on Select statements in procedures 253 255273 277Contents Referential integrity is unenforced 284 285299 309323 339352 Managing User IDs and PermissionsXii Xiii 448 454459 467473 476479 481Xvi Audience How to use this bookXvii Guide to using this book To learn how to Read this chapter Related documentsRelated documents Documentation for Adaptive Server IQAbout This Book XixRelated documents Overview of IQ system administration Introduction to Adaptive Server IQSystem administration tasks System administration tasksAdministrative tasks Overview of Adaptive Server IQ System AdministrationSecurity overview Tools for system administration Tools for system administrationTypes of users Granting permissionsDatabase server Catalogs and IQAdaptive Server Anywhere and Adaptive Server IQ IQ StoreTemporary Store Catalog StoreStored procedures Concurrent operationsAdaptive Server IQ stored procedures Stored proceduresAdaptive Server Enterprise system and catalog procedures Stored Procedures for the IQ Store Procedure name PurposeAdaptive Server Enterprise system procedures System procedure DescriptionCatalog stored procedures Adaptive Server Enterprise catalog proceduresCatalog procedure Description Procedure name PurposeSystem tables and views System tables and viewsSystem table Description Sysdomain Syslogin System view Description SysuserauthCommands and Functions Commands and FunctionsTypes of SQL statements FunctionsManipulate date and time data for example, TODAY, Datediff Message loggingFourth line of the file contains version information Utility database Utility databaseCompatibility with earlier versions Compatibility with earlier versions Starting the database server Server command lines Server command linesGeneral form for the server command line is as follows Starting the server on Unix Running Adaptive Server IQTo start the server on Unix using the startup utility Using the startup utilityStarting the server on Unix Typing the server startup command Starting the server from the NT Start menu Starting the server on Windows NTStarting the server on Windows NT Running the server outside the current session Using command-line switches Running the server as a Windows NT serviceUsing command-line switches Running the Unix database server as a daemonCase sensitivity Using configuration files Elora 16M Tcpipport=2367 -gm Gp 4096 path\mydb.db Naming the server and databases Required if you do not supply a databaseWindow Database startedSample database on that server Controlling performance from the command line Setting memory switchesDefault value of -iqgovernis 2 x the number of CPUs +10 This switch as the number of megabytes of wired memoryUse Concurrent user connections on a particular serverSetting switches that affect timing Controlling permissions from the command line Other performance-related switchesSetting a maximum Catalog page size Setting up a client/server environment Selecting communications protocolsLimiting inactive connections Starting a server in forced recovery mode Starting a server from DbisqlServer from Dbisql Connections, and Catalog page sizeMonitoring server activity Starting multiple servers or clients on the same machineCapture server activity in a log file Log file name has this formatMonitoring server activity Stopping the database server Stopping the database server PIDWho can stop the server? Shutting down operating system sessionsFollowing example stops a server from Dbisql Will be stopped even if there are connections to itStarting and stopping databases Starting and stopping databasesCommand that executes when you perform these steps is From a command line, type the following commandStarting the asiqdemo database Starting and stopping Sybase Central Starting and stopping Sybase CentralConnecting a plug-in Connecting to a plug-inStopping Sybase Central Introduction to connectionsIntroduction to connections How connections are established If you want Consider readingConnection parameters specify connections Connection parameters are passed as connection stringsFollowing form This is equivalent to the following connection stringSimple connection examples Connecting to a database from Dbisql Simple connection examplesIf you need to start the sample database, enter To connect from a Unix systemTo connect from a Windows NT system Password Connecting to other databases from DbisqlEnter the user ID Start Dbisql by typing at a system command prompt Connecting to an embedded databaseTo connect to a database from Dbisql on Unix Extra cache needed for Java To connect to an embedded database from Dbsql in Windows NTConnecting using a data source To connect using a data sourceConnecting to a server on a network Using default connection parameters Connecting from Adaptive Server IQ utilities Named server, using the default databaseYou may connect to the wrong server DatabaseWorking with Odbc data sources DSNs and FILEDSNs Working with Odbc data sourcesCreating and editing Odbc data sources Creating and editing Odbc data sources You could also use the host network address. For exampleTo create an Odbc User Data Source To test an Odbc Data SourceConfiguring Odbc data sources Odbc tabPrevent Driver Not Capable errors Database tab Login tabSelecting this Network tab Advanced tabEnter any additional switches here Creating a File Data SourceName of the file Which the debugging information is to be savedUsing Odbc data sources on Unix Using Odbc data sources on UnixConnection parameters Short Parameter Form Argument DescriptionConnection parameters Not supported in Odbc connections ParametersOr NO, OFF, 0, or False if false Connection parameters and their values are case insensitiveSpecify database files using DBF Specify database names using DBNConnection parameter priorities Use the Start parameter to specify cache sizeHow Adaptive Server IQ makes connections Steps in establishing a connectionHow Adaptive Server IQ makes connections Locating the interface libraryUnix dblib6 with an operating system-specific extension Assembling a list of connection parameters Connection fileAutoStop Ignored if the database is already loaded ParameterIs already running Locating a server Ways by supplying network communication parametersHow Adaptive Server IQ makes connections Locating the database Server name caching for faster connections Connecting from other databases Interactive SQL connectionsUsing an integrated login Using an integrated loginEnabling the integrated login feature Using integrated loginsTo use an integrated login To map an integrated login from Sybase Central Creating an integrated loginTo map an integrate login using a SQL statement Following Dbisql statement Connecting from a client applicationCan connect to a database if all the following are true Security concerns unrestricted database access Setting temporary public options for added security Network aspects of integrated logins Creating a default integrated login userWhat to do if you can’t start Adaptive Server IQ Troubleshooting startup, shutdown, and connectionsEnsure that your files are valid Debugging network communications startup problems Troubleshooting startup, shutdown, and connectionsEnsure that network communication software is running Check environment variablesWhat to do if you can’t connect to a database Resolving problems with your Dbisql window on Unix Stopping a database server in an emergency UnixRunning Adaptive Server IQ Troubleshooting startup, shutdown, and connections Building Your Adaptive Server IQ Databases Designing your databaseUsing Sybase Central to work with database objects Tools for working with database objectsBuilding Your Adaptive Server IQ Databases 100Step-by-step overview of database setup Using Dbisql to work with database objectsWorking with Database Objects 101Scheduling data definition tasks To set up an IQ database102 Extending data definition privileges 103Allocating space for databases Selecting a device type104 Estimating space and dbspaces required 105Working with databases Working with databases106 Creating a database 107108 109 110 Choosing an IQ page size 111Choosing a Catalog page size Specifying the size of your database112 Choosing a block size for your database Enabling Java in the databaseIQ Store size is 8MB and the Temporary Store is 4MB 113Adding dbspaces 114115 To create a dbspace in Sybase CentralDropping dbspaces 116======================================================= 117Working with tables Dropping a databaseCreating tables Working with tables119 Types of tables 120Table placement Type of table Permitted placement Default placementAutomatic index creation for IQ tables 121Optimizing storage and query performance Data type of the column and its widthSee the following table for implications of IQ Unique 122Altering tables 123124 Dropping tablesTo drop a table in Sybase Central 125 Creating primary and foreign keysTo create a primary key in Sybase Central 126 Working with views Table information in the system tables127 To create an unenforced foreign key in Sybase CentralCreating views Working with viewsDefinition in the database system tables 128129 Using viewsTo create a view in Sybase Central Modifying views Permissions on viewsAn existing view definition Alter View statement maintains the permissions on the viewViews in the system tables Deleting views131 Working with indexes Introduction to indexesWorking with indexes 132Indexes in the system tables Creating indexes133 Removing indexes 134Overview of indexes Adaptive Server IQ index typesIndexing 135Overview of indexes 136Adaptive Server IQ Indexes Benefits over traditional indexes137 Creating Adaptive Server IQ indexes Create Index statementCreating Adaptive Server IQ indexes Region column of the salesorder tableCreating an index with Sybase Central Creating indexes concurrently139 To create an index with Sybase CentralChoosing an index type Choosing an index type140 Types of queries Number of unique values in the index141 Query type/index 142Type of Query Usage Recommended Index Type Only the default index supports the following data types Indexing criteria disk space usageData types in the index 143Adaptive Server IQ index types Combining index typesAdaptive Server IQ index types 144Default column index LowFast LF index typeProjections on few rows Recommended useHighGroup HG index type Advantages and disadvantages of LowFastComparison with other indexes Additional indexesAdvantages and disadvantages of HighGroup Automatic creation of HighGroup index147 HG advantages/disadvantages Advantages DisadvantagesAdvantages and disadvantages of HighNonGroup HighNonGroup HNG index type148 Optimizing performance for ad hoc joins Comparison to other indexesHighGroup index is also appropriate for an HNG column 149150 Selecting an indexCriteria to identify Index to select Using join indexes Adding column indexes after inserting dataJoin indexes improve query performance 151When a join becomes ad hoc How join indexes are used for queriesRelationships in join indexes Join hierarchy overviewColumns in the join index 153One-to-many relationship Join hierarchy in query resolution154 155 Custid LnameMultiple table joins and performance 156Steps in creating a join index 157Privileges needed to create a join index Synchronizing join indexes158 Performance hints for synchronization Defining join relationships between tables159 Examples of join relationships in table definitions Using foreign references160 Specifying relationships when creating a join index Specifying the join type when creating a join index161 Issuing the Create Join Index statement Parameters of this command are162 163 Creating a join index in Sybase Central Types of join hierarchies164 To add a join index in Sybase CentralStar joins Linear joins165 Another table You can create this table using the following commands166 Modifying tables included in a join index 167Inserting or deleting from tables in a join index 168Estimating the size of a join index Table versioning controls access to join indexes169 Estimating the size of a join index 170Import and export overview Import and export methodsDatabases 171Input and output data formats Import and export overview172 File Format DescriptionScheduling database updates Permissions for modifying dataSpecifying an output format for Interactive SQL Moving Data In and Out of DatabasesUsing output redirection Exporting data from a databaseExporting data from a database 174Null value output Bulk loading data using the Load Table statement175 Bulk loading data using the Load Table statement 176Format ’ascii’ ’binary’ Delimited by string Quotes on OFF Escapes on OFF Escape Character character177 Binary with Null Byte Prefix 1 2 4 ’delimiter-string’178 179 180 181 Block Factor number Block Size numberPreview on OFF ROW Delimited by ’delimiter-string’ Start ROW ID numberOn default is NATIVE. You can also specify Specifies the byte ordering during reads. ThisEndian platforms like DEC ALPHA, and Windows NT Here is a Windows NT exampleTable. The default is 0 for no limit Specifies the maximum number of rows to insert intoOptions work together 183184 Following Windows NT example sets the column delimiter for Carriage return \x0dWith the Limit option, and takes precedence over it 185186 Interpreting notification messages Memory messageThis message displays memory usage information 187Main IQ Store blocks messages IQ Temporary Store blocks messageMain buffer cache activity message 188Temporary buffer cache message Controlling message loggingThese lines display information about the Temp buffer cache See the description for the Main buffer cache message aboveUsing the Insert statement Using the Insert statementInserting specified values row by row 190Inserting selected rows from the database Complete description of Adaptive Server IQ data typesFollowing example adds 1995-06-09 into the lshipdate column Into the lorderkey column in the lineitem tableInserting selected rows from the database Inserting from a different database192 Issue a Commit to commit the insert Lineitem table in the current database193 To insert data directly from Adaptive Server Enterprise194 Inserting into tables of a join index Importing data interactively195 Inserting into primary and foreign key columns Inserting into primary and foreign key columns196 Partial-width insertions 197Partial-width insertions Partial-width insertion rules198 Query Additional columnsInstead of the correct number 199Start ROW ID option in the second Load Table statement 200Index 201Converting data on insertion Converting data on insertion202 203 Inserting data from pre-Version 12 Adaptive Server IQ Load conversion options204 Conversion options for loading from flat filesData conversions in IQ 205206 IQ conversions for comparison operations207 IQ conversions for arithmetic operationsUsing the Ascii conversion option Column width issues208 209 Date Option Substitution of Null or blank charactersSpecifying the Date Format 210211 Datetime conversion option Setting Year specified as Years assumed212 Specifying the format for Datetime conversions 213Formatting times 21410 Datetime format options Working With Nulls Where Blanks indicates that blanks convert to Nulls215 Other factors affecting the display of data Other factors affecting the display of data216 Unsupported Adaptive Server Enterprise data types Matching Adaptive Server Enterprise data types217 Matching Adaptive Server Enterprise data types Adaptive Server Enterprise data type equivalents218 219 Adaptive Server Adaptive Server IQ Enterprise Datatype13 Character data types Adaptive Server Enterprise Datatype IQ Datatype220 Handling conversion errors on data import15 DATE/TIME data types Tuning bulk loading of data Improving load performance during database definitionOptimizing for the number of distinct values Creating indexesSetting server startup options Adjusting your environment at load timeTuning bulk loading of data Adding dbspacesReducing Main IQ Store space use in incremental loads 223Changing data using Update Changing data using Update224 Deleting data 225Importing data by replication Importing data by replication226 227 228 Overview of procedures Adaptive Server IQStatements, are also available in batches 229Benefits of procedures Introduction to proceduresBenefits of procedures 230Using Procedures and Batches Creating procedures231 Calling procedures Dropping proceduresIntroduction to procedures 232Returning procedure results in parameters Permissions to execute procedures233 234 Returning procedure results in result setsEmployee ID Salary Creating user-defined functions Introduction to user-defined functions235 Calling user-defined functions Introduction to user-defined functions236 Fullname empfname, emplnameDropping user-defined functions Permissions to execute user-defined functionsFollowing statement revokes permission to use the function 237Introduction to batches Introduction to batches238 239 Control statementsDbisql and batches Using compound statements Control statements240 Control statement SyntaxDeclarations in compound statements 241Atomic compound statements 242SQL statements allowed in procedures Structure of procedures243 Structure of procedures Declaring parameters for procedures244 Passing parameters to procedures Passing parameters to functionsOr as follows 245Returning results from procedures Returning a value using the Return statementReturning results from procedures 246Returning results as procedure parameters 247Declared in the procedure argument list Show the number of orders placed by the customer with IDCustomerID parameter is declared as an in parameter. This Orders variable that is returned to the calling environmentReturning result sets from procedures 249Returning multiple result sets from procedures Returning variable result sets from proceduresProcedure 250Using cursors in procedures 251Using cursors in procedures Cursor management overviewCursor positioning 252Using cursors on Select statements in procedures 253254 Errors and warnings in procedures 255Errors and warnings in procedures Default error handling in procedures256 257 Error handling with on Exception Resume 258259 On Exception Resume BeginDefault handling of warnings in procedures 260Using exception handlers in procedures 261262 Nested compound statements and exception handlers 263Following statement executes the InnerProc procedure Using the Execute Immediate statement in procedures264 Transactions and savepoints in procedures Some tips for writing proceduresCheck if you need to change the command delimiter 265Remember to delimit statements within your procedure Use fully-qualified names for tables in proceduresSpecifying dates and times in procedures Some tips for writing proceduresStatements allowed in batches Verifying procedure input arguments267 Using Select statements in batches Calling external libraries from procedures268 Creating procedures and functions with external calls 269Following form for Microsoft Visual C++ External function declarations270 How parameters are passed to the external function 271Special considerations when passing character types 272How data can become invalid Data integrity overview273 Data integrity overview Integrity constraints belong in the database274 How database contents get changed Data integrity toolsSQL statements for implementing integrity constraints 276Using Unique constraints on columns or tables Using table and column constraints277 Using IQ Unique constraint on columns Using Check conditions on columnsUsing table and column constraints 278Option Column Check conditions from user-defined data types279 Using Check conditions on tables Working with column constraints in Sybase CentralModifying and deleting Check conditions 280Declaring entity and referential integrity 281If a client application breaches entity integrity Enforcing entity integrity282 Declaring referential integrity Primary keys enforce entity integrity283 Referential integrity is unenforced How you define foreign keys284 Integrity rules in the system tables 285Integrity rules in the system tables 286Performance and other aspects of database administration Overview of transactions and versioningIntroduction to transactions Transactions are logical units of workUsing transactions Starting transactionsCompleting transactions Overview of transactions and versioningOptions in Dbisql Committing a transaction writes data to diskTransactions and Versioning 289Introduction to concurrency Subdividing transactionsHow concurrency works in IQ 290Concurrency for backups Why concurrency benefits youIntroduction to versioning Concurrency and IQ MultiplexOne writer and multiple readers at the table level Table-level versioning292 293 Only one writer at a timeMultiple writers and readers in a database 294Transactions use committed data 295Timing of commits on read transactions affects versions 296Hold cursors span transactions 297Versioning of temporary tables How Adaptive Server IQ keeps track of versions298 Versioning prevents inconsistencies How locking worksLocks for DML operations 299How locking works Locks for DDL operations300 301 Isolation levels Primary keys and lockingIsolation levels 302Checkpoints, savepoints, and transaction rollback 303Checkpoints aid in recovery When checkpoints occurCheckpoints Checkpoints, savepoints, and transaction rollbackReleasing savepoints Savepoints within transactions305 Rolling back to a savepoint Automatic and user-defined savepointsNaming and nesting savepoints Following scenarioSystem recovery Rolling back transactionsWhat causes a rollback Effect of rollbackHow transaction information aids recovery 308Performance implications 309Performance implications Overlapping versions and deletions310 Cursors in transactions 311Cursors and versioning Cursor sensitivityCursor scrolling Cursors in transactionsCursor command syntax and examples Hold cursorsPositioned operations Controlling message logging for cursors314 Adaptive Server IQ international features Installation to handle international language issuesIntroduction to international languages and character sets 315Using the default collation Character set questions and answersIntroduction to international languages and character sets 316Understanding character sets in software Pieces in the character set puzzleInternational Languages and Character Sets 317318 Language issues in client/server computingDatabase server software messages Applications can cause Code pages in Windows and Windows NT 319Ansi and OEM code pages in Windows and Windows NT 320Multibyte character sets 321Sorting characters using collations International aspects of case sensitivityFirst-byte collation orderings for multibyte character sets 322Understanding locales Introduction to localesCase insensitivity of identifiers 323Understanding locales Understanding the locale language324 325 Understanding the locale character setAlternative Language label Label ISO639 language code 326 Equivalent Iana labels and a descriptionCharacter set Label Iana label Description 327 Setting the Sqllocale environment variable Understanding collationsUnderstanding the locale collation label Displaying collationsSupplied collations Following collations are supplied with Adaptive Server IQ329 Collation Label Type Description330 Ansi or OEM? 331332 333 334 335 Using multibyte collations Understanding character set translationCharacter translation for database messages Understanding character set translation337 To use character translation for database messagesAvoiding character-set translation Connection strings and character sets338 339 Collation internalsLanguage Character set Comment lines Title lineCollation internals 340Specification Description Collation sequence sectionFollowing are some sample lines for a collation 341Encodings section That will be sorted togetherFollowing is part of the Shift-JIS collation file 342Properties section 343Finding the default collation Configuring your character set environmentTo configure your character set environment International language and character set tasksYou can determine locale information using system functions Determining locale information345 To determine the locale of a database serverSetting locales Creating a database with a named collationYour current machine 346List the supplied collation sequences 347Starting a database server using character set translation Using Odbc code page translationTo enable character-set translation on a database server Or on UnixCharacter set translation for Sybase Central and Dbisql Creating a custom collationSet the Dbisql option CHAROEMTranslation to a value of OFF 349350 Compatibility issues Creating a database with a custom collation351 To create a database with a custom collationPerformance issues Performance issues352 Manage user IDs An overview of database permissions353 An overview of database permissions DBA authority overview354 Resource authority overview Ownership permissions overviewTable and views permissions overview Managing User IDs and PermissionsGroup permissions overview Managing individual user IDs and permissions356 Changing a password With the following commandCreating new users 357Granting DBA and resource authority 358Granting permissions on tables and views 359Granting users the right to grant permissions Context of groups in Permissions of groups360 To grant user permission on tables in Sybase CentralTo grant user permissions on procedures in Sybase Central Granting permissions on procedures361 Revoking user permissions 362To create a group with a name and password Managing groupsCreating groups 363Granting group membership to users Managing groups364 To create a group in Sybase CentralReferring to tables owned by groups Permissions of groups365 Groups without passwords 366Special groups Database object names and prefixes367 Database object names and prefixes 368Following command will now work Using views and procedures for extra security369 Using views and procedures for extra security Using views for tailored security370 Grant permission for the Sales Manager to examine this view Using procedures for tailored security371 How user permissions are assessed Managing the resources connections useHow user permissions are assessed Be modified is strictly definedTemporary Store 373Users and permissions in the system tables Users and permissions in the system tablesLimits the number of prepared 374Views Default Contents Default Contents375 376 Backup protects your data 377Types of backups Data in backupsBacking up your database Backing up your databaseBackup and Data Recovery Transaction log in backup, restore, and recovery379 Distribution of backup data Disk backup requirementsTape backup requirements Selecting archive devicesPreparing for backup Obtaining DBA privilegesRewinding tapes 381Retaining old disk backups Two ways to run BackupYou can run Backup in two ways Estimating Media CapacityConcurrency and backups Backup statementTo back up an IQ database, use the following syntax 383Specifying the type of backup Specifying operator presenceSpecifying archive devices 384385 386 387 Backup Examples Other backup optionsWaiting for Tape Devices 388Recovery from errors during backup Checking for backup spaceRecovery attempts 389After you complete a backup Performing backups with non-Sybase productsDo not specify the Stacker or Size parameters 390Shutting down the database Performing system-level backups391 Restoring from a system-level backup Performing system-level backupsBacking up the right files 392393 Validating your databaseFor this size database It takes about this long Interpreting results Validating your database394 Orphaned block statistic MeaningConcurrency issues for spiqcheckdb 395Before you restore Restoring your databasesRestoring your databases 396Restore accommodates dbspace changes 397Restoring disk backup files Restoring tape backup filesSpecifying files for an incremental restore Keeping the database unchanged between restoresRestore statement Restoring from a compatible backupTo restore a database, use the following syntax 399Moving database files 400401 402 Adjusting data sources and configuration files Restoring in the correct orderDisplaying header information 403Set must be restored first, and must be in the first device Set, and the restore order, are as follows404 Renaming the transaction log after you restore Dblog command-line utilitySwitch Description 405Validating the database after you restore Restore requires exclusive write accessTransaction log utility options Maintaining a transaction log or mirrorDisplaying header information 407Using Symbolic Links Unix Only Recovery from errors during restore408 Unattended backup 409Getting information about backups and restores Locating the backup logGetting information about backups and restores 410Content of the backup log 411Maintaining the backup log Viewing the backup log in Sybase CentralRecording dbspace names 412Determining your data backup and recovery strategy 413Scheduling routine backups Determining the type of backupDetermining your data backup and recovery strategy 414Designating Backup and Restore Responsibilities Improving performance for backup and restoreIncreasing the number of archive devices 415Spooling backup data Increasing memory used during backupEliminating data verification Balancing system loadControlling the size of the Catalog Store 417418 DBA can tune performance by adjusting resource usage Your hardware and software configurationIntroduction to performance terms Designing for performanceOverview of memory use Paging increases available memoryOverview of memory use 420Utilities to monitor swapping Server memoryManaging System Resources 421Determining the sizes of the buffer caches Managing buffer caches422 Adaptive Server IQ memory overhead Operating system and other applications423 Multi-user database access 424Raw partitions versus file systems Memory requirements for loads425 Adaptive Server IQ main and temp buffer cachesBuffer caches and physical memory Example of setting buffer cache sizes 426Other considerations Memory available for buffer caches ExampleMethods of adjusting buffer cache sizes Setting buffer cache sizes427 428 Setting buffer cache size database optionsTo change the buffer cache sizes permanently Setting buffer cache size server switches Setting the page sizeNormally you change the buffer cache sizes by setting Specifying page sizeBlock size 430Decrease buffer cache settings Adjust blocking factor for loadsSaving memory Data compressionIQ command line option changes Actively using the databaseOptimizing for large numbers of users Use the following guideline to determine Block FactorCommand and set rlimfdmax=4096 in /etc/system IQ Temp spaceSystem parameters 433Platform-specific memory options 434Recommendations for small memory configurations Physical size of memory on the systemOptions that can provide more memory 435436 You must then restart the server with the following command Managing large buffer caches on HPControlling file system buffering 437Other ways to get more memory Options for Java-enabled databases438 Process threading model 439Insufficient threads error IQ options for managing thread usageProcess threading model 440Raw I/O on Unix operating systems Balancing I/O441 Using disk striping Setting up disk striping on UnixSetting up disk striping on Windows NT Balancing I/ORecommendations for disk striping Internal striping443 Disk striping hints Disk striping option444 Using multiple dbspaces Temporary data with the Create Dbspace commandTransaction log file Across multiple disksMessage log Strategic file locations446 Working space for inserting, deleting, and synchronizing 447Options for tuning resource use Options for tuning resource useRestricting concurrent queries 448Limiting a query’s memory use Limiting queries by rows returnedForcing cursors to be non-scrolling 449Limiting the number of cursors Limiting the number of statementsLowering a connection’s priority Prefetching cache pagesRestricting database access Other ways to improve resource useOptimizing for typical usage Disk cachingUsing RAM disk Indexing tipsPicking the right index type Indexing tipsAllowing enough disk space for deletions Using join indexes453 Managing database size and structure Managing the size of your databaseDenormalizing for performance Managing database size and structureDenormalization has risks Disadvantages of denormalizationPerformance benefits of denormalization 455Improving your queries Deciding to denormalizeTips for structuring queries Improving your queriesQuery evaluation options Planning queries457 Setting query optimization options 458Improving large data transfers Network performance459 Network performance Isolate heavy network users460 Put small amounts of data in small packets 461Put large amounts of data in large packets 462Filter as much data as possible at the server level Process at the server level463 464 Getting information using stored procedures Other chapters of this guide for more tuning hintsViewing the Adaptive Server IQ environment Set to control resource use, see , Managing SystemViewing the Adaptive Server IQ environment 466Monitoring and Tuning Performance Monitoring the buffer cachesStarting the buffer cache monitor 467Monitoring the buffer caches 468469 470 471 Stopping the buffer cache monitor Examining and saving monitor results472 Into dummytablename Stop MonitorBuffer cache Examples of monitor results473 474 -contentionresults for the main cache are -contentionresults for the temp cache areResults for the memory manager are 475Avoiding buffer manager thrashing Avoiding buffer manager thrashing476 Monitoring paging on Windows NT systems Monitoring paging on Unix systemsHere is an example 477478 System utilities to monitor CPU use 479System utilities to monitor CPU use 480Client/server interfaces to Adaptive Server IQ Data server for client applicationsRestrictions for creating and running these applications 481Client/server interfaces to Adaptive Server IQ 482Configuring IQ Servers with Dsedit Interfaces fileAdaptive Server IQ as a Data Server 483Using the Dsedit utility Opening a Directory Services sessionStarting Dsedit 484Adding a server entry Adding or changing the server addressInterfaces file sql.ini Select a server entry in the Server boxNetwork Settings, in the Control Panel 486Renaming a server entry Verifying the server address487 Sybase applications and Adaptive Server IQ Open Client applications and Adaptive Server IQDeleting server entries 488Setting up Adaptive Server IQ as an Open Server System requirementsStarting the database server as an Open Server 489Setting up Adaptive Server IQ as an Open Server Configuring your database for use with Open Client490 491 Characteristics of Open Client and jConnect connectionsOption Set to To change the option settings for TDS connections Characteristics of Open Client and jConnect connections492 To connect to the livecredit server, use this syntax Servers with multiple databases493 494 Index 495Index 496497 WINLATIN1498 Datetime499 Odbc Unix500 501 DDL502 Pipenotconnected503 504 See Also Dbisql505 506 507 Null508 TCP/IP509 See Also stored510 Rawdetect511 512 513 514 515 516