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IQ 12.4.3 Release – Engineering

11. IQ 12.4.3 Release – Engineering. HIGHLIGHTS OF RELEASE 12.4.3. Direct Customers: - Multi-Column Index (Referential Integrity) - Compare Index - OLAP Extensions: Cube, Ranges in Group By, Standard Deviation, Variance

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IQ 12.4.3 Release – Engineering

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  1. 11 IQ 12.4.3 Release – Engineering

  2. HIGHLIGHTS OF RELEASE 12.4.3 • Direct Customers: - Multi-Column Index (Referential Integrity) - Compare Index - OLAP Extensions: Cube, Ranges in Group By, Standard Deviation, Variance - Performance: Data Loads, Parallel Group by Hash, Prefetching - Update Command for Joins - CIS Support on Sun Platform

  3. HIGHLIGHTS OF RELEASE 12.4.3 • Web Support: - XML - Java Stored Procedures - Word Index - GUID Index (Binary Datatype)

  4. HIGHLIGHTS OF RELEASE 12.4.3 (continued) Multiplex: IBM 32 Support HP 64 Support Migration Simplification Elimination of small temp space set-up DBRemote Versioning Simplification of Converting a Reader to Writer Removal of 26 Drive Limit (NT) Simplification of moving writer to different machine Documented Failover Procedure Sybase Central - offline node support, browse buttons

  5. HIGHLIGHTS OF RELEASE 12.4.3 (continued) • High Volume Support: VLDB: Intermediate Versioning High Group Incremental Load Performance Aggregate Union Pushdown Query Performance for Views across Multiple Tables

  6. HIGHLIGHTS OF RELEASE 12.4.3 (continued) Other: Veritas Backup/Restore Support New Platform - HP 64 bit “Silent” Install for Client Machines OLE DB Connectivity Support Automatic printout of settings at start-up SA version 7.0.2 support

  7. 12.4.3 Query Engine

  8. Contents • Referential Integrity - Phase 1 • OLAP - Cube, StdDev, Variance • Update with joins • Word Index • Binary Datatype • Union view performance • IN Predicate improvements • Range Group By in Indexes

  9. Referential Integrity - Phase 1 • Phase 1: Unique multi-column High Group • Primary Key • Candidate Key • Still need to index each component column • Limit 255 bytes • Join optimizer users for arity and cardinality • Phase 2 will be non-unique MCHG • Phase 3 will be enforce RI

  10. OLAP • Group By Cube • Can uses all 3 algorithms for initial grouping • Limit 1e6 rows (Hash based secondary grouping) • Standard Deviation • Variance

  11. Update with Joins • Update T1From T1 Inner Join T2 on ( T1 x T2)Where … • T-SQL language extension • Can copy cells from one table to another • Matches T-SQL Delete statement

  12. Word Index • Treat a varchar, long varchar, char column as a nested relation • Supply delimiter characters • Keyword lists • URL components • CONTAINS predicate • Conjunctive: <base col> Contains (‘key1’, ‘key2’…) • Disjunctive <base col> Contains (‘key1’) or <base col> Contains (‘key2’)

  13. BINARY, VARBINARY datatypes • ASE compatible (Not ASA compatible) • stored as 2 nibbles per byte (use even lengths) • character like not integer like • HexToInt() and IntToHex() • High Group index only • Compatibility switch

  14. Union View Performance • Performance improvements for projection • Aggregate pushdown (patent applied for) • Select c1, Sum(c2) From (Select T1 Union All Select T2) Group By c1 • Select c1, Sum(c2’) From (Select C1, Sum(c2) From T1 Group By c1 Union All…) • Analogous parallel group by now on by default

  15. IN Predicate Improvements • Sort-based IN subqueries • above calculated/set option Max_Hash_Rows • Large IN-lists tested to 250k values • First round performance improvements to parser • Second round in 12.5

  16. Range Group By in Indexes • Performance improvements to single-table GB • Select * From T1Group By c1Where c1 Between lowVal And highVal • Scans btree evaluating predicate • char/varchar (ISO case respect only) • Cutoff to vertical based on groups meet restriction • Previously based on cardinality of GB column • Most predicates can be used • More queries executed in indexes in 12.4.3

  17. Miscellaneous Changes

  18. Other New Functionality • Events and Schedules • New stored procedures: sp_iqspaceused, sp_iqconnection, sp_iqtransaction • Extended store procedures • Intermediate Versioning • Prefetch • Out of Space

  19. Events and Schedules • You can automate routine tasks in ASIQ12.4.3 by adding an event to a database, and providing a schedule for the event. • Whenever one of the times in the schedule passes, a sequence of actions called an event handler is executed by the database server.

  20. The Create Event Command CREATE EVENT event-name ... [ TYPE event-type [ WHERE trigger-condition [ AND trigger-condition ], ... ] | SCHEDULE schedule-spec, ... ] ... [ ENABLE | DISABLE ] ... [ AT { CONSOLIDATED | REMOTE | ALL } ] ...[ HANDLER BEGIN ... END ] event-type BackupEnd | "Connect" | ConnectFailed | DatabaseStart | DBDiskSpace | "Disconnect" | GlobalAutoincrement | GrowDB | GrowLog | GrowTemp | LogDiskSpace | "RAISERROR" | ServerIdle | TempDiskSpace trigger-condition: event_condition( condition-name ) { = | < | > | != | <= | >= } value schedule-spec: [ schedule-name ] { START TIME start-time | BETWEEN start-time AND end-time } [ EVERY period { HOURS | MINUTES | SECONDS } ] [ ON { ( day-of-week, ... ) | ( day-of-month, ... ) } ] [ START DATE start-date ]

  21. An Example create table mysummary(dt datetime, users int, mainKB unsigned bigint, mainPC unsigned int, tempKB unsigned bigint, tempPC unsigned int) ; create event mysummary schedule sched_mysummary start time '00:01 AM' every 10 minutes handler begin declare mt unsigned bigint; declare mu unsigned bigint; declare tt unsigned bigint; declare tu unsigned bigint; declare conncount unsigned int; set conncount = db_property('ConnCount'); call sp_iqspaceused(mt,mu,tt,tu); insert into mysummary values( now(), conncount, mu, (mu*100)/mt, tu, (tu*100)/tt ); end ;

  22. New Stored Procedures • sp_iqspaceused Returns four out parameters containing the total and used dpspace for the main and temp stores, in Kbytes. • sp_iqconnection Returns a row of information for each active connection. • sp_iqtransaction Returns a row for each transaction control block in the IQ transaction manager. Rows are ordered by TxnID.

  23. sp_iqconnection ConnHandle Name Userid LastReqTime ReqType IQCmdType ========== ======== ====== ========================= ==================== ==================== 419740283 red2 DBA 2001-04-02 15:54:54.605 STMT_EXECUTE_IMM INSERT 640038605 blue1 DBA 2001-04-02 13:32:42.505 CURSOR_PREFETCH NONE 2094200996 DBA 2001-04-02 13:30:27.486 STMT_EXECUTE_ANY_IMM NONE 954498130 fromSCJ DBA 2001-04-02 15:55:02.787752 STMT_DROP NONE 167015670 blue2 DBA 2001-04-02 13:45:50.232752 STMT_DROP NONE 1306718536 DBA 2001-04-02 15:08:36.716 STMT_EXECUTE_ANY_IMM NONE 1779741471 ntJava2 DBA 2001-04-02 15:54:58.558752 STMT_DROP NONE 710225777 nt1 DBA 2001-04-02 15:56:02.729 CURSOR_OPEN IQUTILITYOPENCURSOR … LastIQCmdTime IQCursors LowestIQCursorState IQthreads TxnID ConnCreateTime … ======================= ========= =================== ========= ===== ======================== … 2001-04-02 15:54:54.630 1 EXECUTED 7 10701 2001-04-02 13:17:27.599 … 2001-04-02 13:32:42.295 1 FETCHING 2 10568 2001-04-02 13:21:19.953 … 2001-04-02 13:30:27.548 0 NONE 1 10604 2001-04-02 13:24:35.145 … 2001-04-02 15:55:02.590 0 NONE 1 10619 2001-04-02 13:31:26.001 … 2001-04-02 13:45:50.225 0 NONE 1 10678 2001-04-02 13:35:01.160 … 2001-04-02 15:09:30.320 0 NONE 1 16687 2001-04-02 13:37:50.814 … 2001-04-02 15:54:58.553 0 NONE 1 10676 2001-04-02 13:43:57.907 … 2001-04-02 15:56:02.755 0 NONE 1 10699 2001-04-02 14:05:15.748 … TempTableSpaceKB TempWorkSpaceKB IQconnID satoiq_count iqtosa_count CommLink NodeAddr LastIdle … ================ =============== ======== ============ ============ ======== ============= ====== … 68736 680 14 82 2031 TCPIP 157.133.82.17 9905 … 0 102592 17 76 360 local 606 … 0 0 18 397 688 TCPIP 157.133.83.151 8322 … 0 0 20 709 1541 TCPIP 157.133.83.151 5378 … 0 128 21 131 2082 local 5122 … 0 0 23 18313 821 TCPIP 157.133.83.151 10000 … 0 0 24 994 1667 TCPIP 157.133.83.151 1467 … 0 0 28 900 478 TCPIP 157.133.83.151 5473

  24. sp_iqtransaction Name Userid TxnID CmtID VersionID State ConnHandle IQConnID ======= ===== ====== ====== ========= ========== =========== ======== red2 DBA 10058 10700 10058 COMMITTED 419740283 14 blue1 DBA 10568 0 10568 ACTIVE 640038605 17 DBA 10604 0 10604 ACTIVE 2094200996 18 fromSCJ DBA 10619 0 10619 ACTIVE 954498130 20 blue2 DBA 10634 10677 10634 COMMITTED 167015670 21 ntJava2 DBA 10676 0 10676 ACTIVE 1779741471 24 blue2 DBA 10678 0 10678 ACTIVE 167015670 21 nt1 DBA 10699 0 10699 ACTIVE 710225777 28 red2 DBA 10701 0 10701 ACTIVE 419740283 14 DBA 16687 0 16687 ACTIVE 1306718536 23 … MainTableKBCreated MainTableKBDropped TempTableKBCreated TempTableKBDropped … ================== ================== ================== ================== … 0 0 65824 0 … 0 0 0 0 … 0 0 0 0 … 0 0 0 0 … 3960 152 0 0 … 0 0 0 0 … 2440 1992 0 0 … 0 0 0 0 … 0 0 2912 22096 … 0 0 0 0 … TempWorkSpaceKB TxnCreateTime Dbremote CursorCount SpCount SpNumber … =============== ======================== ======== =========== ======= ======== … 0 2001-04-02 13:17:27.612 0 1 3 2 … 102592 2001-04-02 13:27:28.491 0 1 1 0 … 0 2001-04-02 13:30:27.548 0 0 1 0 … 0 2001-04-02 13:31:27.151 0 0 24 262 … 0 2001-04-02 13:35:02.128 0 0 0 0 … 0 2001-04-02 13:43:58.805 0 0 39 408 … 128 2001-04-02 13:45:28.379 0 0 1 0 … 0 2001-04-02 14:05:15.759 0 0 42 413 … 680 2001-04-02 14:57:51.104 0 1 2 20 … 0 2001-04-02 15:09:30.319 0 0 1 0

  25. Extended Stored Procedures • The extended stored procedures are: • xp_cmdshell Executes a system command. • xp_msver Returns a string containing version information • xp_read_file Returns the contents of a file as a LONG BINARY variable • xp_write_file Writes data to a file from a SQL statement. • xp_sprintf Builds a string from a format string and a set of input strings. • xp_scanf Extracts substrings from an input string and a format string. • MAPI functions • xp_startmail Starts a mail session in a specified mail account by logging on the MAPI message system • xp_sendmail Sends a mail message to specified users • xp_stopmail Closes the mail session

  26. Intermediate Versions • ASIQ12.4.3 Simplex databases drop intermediate versions at the earliest possible time • Mpx databases use the old algorithm: versions are only dropped when the oldest version is no longer in use • sp_iqtransaction provides detailed version information (some interpretation required)

  27. Prefetch • All ASIQ12.4.3 database pages, except blockmaps, are prefetched when accessed sequentially • Data is almost always accessed sequentially • One central Prefetch Manager per iq store • Each application (e.g. sort, garray, a row of fp indexes) has a fixed read-ahead quota • Prefetch statistics returned by the cache_by_type and debug performance monitors

  28. Out of Space Handling • Main and Temp Reserved Space • should be set to 100MB or so • sp_iqconnection and sp_iqtransaction show who is using what, which versions exist, and why • User defined events may be written to monitor and manage space usage

  29. Multiplex

  30. IQ Engine Changes • Start without IQ Temp Store • limited functions; for use by Sybase Central • Multiplex features already loaded • iq.sql: stored procedures, schema • available via ALTER DATABASE UPGRADE • Treat dbremote connections properly for TLV • Windows NT: access more than 26 drives • use \\.\PhysicalDriveN naming scheme

  31. Sybase Central Changes • Integrate support for various actions: • Create Database • Start Database Server • Standardize on use of params.cfg file • from$ASDIR/scripts/default.cfg • Place database files anywhere • Browse button for local files

  32. Sybase Central Changes 2 • New Convert to Multiplex Wizard • replaces upgrade script, manual procedure • Create Query Server Wizard • specify IQ Temp characteristics • synchronizes and starts new server • New Replace Write Server Wizard • Stop Multiplex Wizard • checkbox to start write server in simplex • Off-line nodes support

  33. Off-line nodes support

  34. Documented procedures Truncate transaction log Fail-over after write server failure

  35. DDL Processing

  36. RELEASE 12.4.3 - DDL • Compare (CMP) Index • Enforced Multi-Column Primary Key • Multi-Column Unique HG Index • Incremental HG Load Performance • More Aggressive TLV

  37. Information Required by Engineering

  38. General Information • Hardware, memory and # of CPUs • Operating System and version • IQ version and EBF level • can get the version from the message file (*.iqmsg), sp_iqstatus or from ‘select @@version’ • the time the problem or situation occurred • to help match the log files with the problem

  39. General Information - cont. • Indicate if the problem can be reproduced in house • if so, provide all steps on how to reproduce • If sp_iqcheckdb was run, indicate what the dbcc_option option was set to and if any errors were detected • provide the output from sp_iqcheckdb if errors were encountered

  40. General Information - cont. • Output from sp_iqstatus • All IQ log files: • server logs • UNIX: • asiq12/logfiles/<servername>.00n.stderr • asiq12/logfiles/<servername>.00n.srvlog • NT: • copy of the console window • Multiplex environment: • message.log file for each reader and writer

  41. General Information - cont. • All IQ log files - cont: • <database_name>.iqmsg - IQ Message file • found in same directory as the .db file • stktrc.iq - stack trace file • found in the $SYBASE directory • Configuration file, if used • sometime named <database_name>.cfg • remember to get logs for each server in a Multiplex environment

  42. Query Related Problems • Run the problem query with the following settings: • set temporary option.query_plan=‘on’; • set temporary option.query_detail=‘on’; • set temporary option.query_plan_after_run =‘on’;

  43. Application problems • Operating System and version of client machine • application name and version • If Open Client and/or ODBC is being used, indicated what version • provide ODBC trace output of it is a connection problem or wrong results with ODBC application

  44. Application Problems - cont. • Indicate if problem happens when running query through dbisql or dbisqlc

  45. 12.4.3 End

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