DB2 Performance Health Check... in just few minutes. DUGI 8-9 April 2014

Transcription

1 DB2 Performance Health Check... in just few minutes DUGI 8-9 April 2014

2 Introduction DB2 is the preferred repository for mission critical data at all z/os sites Performance of z/os and non z/os based applications accessing DB2 data is critical for every company business Managing even simple DB2 environments with continuously shrinking staff is more and more a challenge DB2 system programmers and DBAs have normally not enough time to dedicate to performance analysis and tuning of DB2 subsystems and applications 2

3 EPV for DB2 EPV for DB2 is an out of the box Performance and Capacity Management solution for z/os environments of any size, type and complexity EPV for DB2 uses standard input data normally available in any z/os environments (mostly SMF records) Through automatic discovery techniques and built-in rules, based on more than 30 years know-how, EPV transforms the bits and bytes into useful information, in a process completely transparent to the users 3

4 Goals The main goal of EPV for DB2 is to provide a comprehensive view of DB2 environments of any level of complexity and to allow a quick and effective top down analysis of DB2 subsystems and workloads. This goal is accomplished through a completely automated process, without any need for human intervention. 4

5 Goals This capability solves what has become a critical issue at most sites: the number of DB2 system analysts and DBA which is normally barely enough to manage an increasing number of DB2 subsystems. In this situation DB2 performance analysis and tuning is an almost impossible task to perform. Thanks to the product design, it is possible to perform a complete check of even the most complex environments in just a few minutes, without the need for coding and running SQL or programs. 5

6 Advantages Most important advantages of EPV for DB2 All the information is ready automatically every day, with no manual intervention required; Information can be used directly, and additionally you can also export any view to Excel with a single click for further analysis; You can easily compare one day to another or one DB2 subsystem to another; Exceptions, critical events and trespassing of thresholds, are highlighted and reported Daily, weekly and monthly trends are produced EPV for DB2 is constantly enhanced to reflect DB2 s evolution, removing the maintenance costs of in-house solutions 6

7 Advantages A final important advantage that our EPV for DB2 customers have found is that, most of the time, all the other performance analysts (CICS, IMS, z/os, WebSphere, Capacity Planning) don t have to ask DB2 experts to dedicate time to produce the reports and information they need. They can go straight to with EPV for DB2. This is really a double advantage A lot of DB2 information is freed up and always available to people who need it Precious DB2 experts time is saved 7

8 Advantages Architecture EPV is completely automatic and based on auto discovery techniques EPV runs on any platform EPV can run stand alone (Plus) or take input from SAS/MXG or SAS/ITRM EPV supports MySQL, MS SQL Server and SAS DB EPV for DB2 and EPV for DB2 Plus produce exactly the same results All the reports are in HTML pages 8

9 Catalog Parms SMF EPV for DB2 Plus Architecture EPV zparser Parser SQL DB EPV for DB2 EPV SQL DB 9

10 Unique characteristics EPV reports are in static HTML pages Every EPV report can be exported to MS-Excel with just a click of the mouse EPV reports are enhanced with proprietary functions greatly improving product usability Reports design No clients are needed, only a standard browser EPV reports are fixed in content; they can t be changed by any event happening to the DB EPV reports can be easily archived and then reused at a later date providing full navigation capabilities 10

11 Usability functions Top of page Split & Compare Previous/Next day Calendar 1. Column Manager 2. Scroll 3. Export to Excel 4. Favourites 5. Help System 6. Refresh 11

12 Help system example GLOBAL DYN CACHE ACTIVITY This view shows the Global Dynamic Statement Cache activity hourly profile inside a DB2 subsystem FIELD DESCRIPTION SOURCE SHORT PREPARE Total number of short PREPARE. FULL PREPARE Total number of full PREPARE (see Note 1). QISEDSI QISDSG - QISEDSI TOTAL PREPARE Total number of PREPARE. QISEDSG CSWL MATCHED CSWL UNMATCHED Total number of hits when using the CONCENTRATE STATEMENTS WITH LITERALS attributes in the prepare statement. Total number of misses when using the CONCENTRATE STATEMENTS WITH LITERALS attributes in the prepare statement. QXSTCWLM QXSTCWLP - QXSTCWLM The following metrics are presented: CSWL REPLACED CSWL DUPLICATED Total number of times at least one literal has been replaced in a dynamic statement because CONCENTRATE STATEMENTS WITH LITERALS was used. Total number of times duplicate STMT instance has been created when using the CONCENTRATE STATEMENTS WITH LITERALS attributes. The duplicate STMT instance was needed because a cache match failed because the literal reusability criteria was not met. QXSTCWLR QXSTCWLD 12

13 Unique characteristics EPV automatically provides a log of the changes made to DB2 parameter EPV exception alerts can be selectively and automatically distributed to technical groups and managers Automatic alerting EPV provides a set of user definable thresholds to create exception alerts for performance problems and excessive resource usage workloads EPV uses statistical analysis and self adaptive thresholds to automatically intercept abnormal behavior and produce exception alerts 13

14 Exceptions EXCEPTIONS - TUE, 23 OCT 2012 MESSAGE OBJEC T FREQ OP THRESHOLD ALERT % DBD POOL MEMORY FULL SYSTEM=SYSA,DB2ID=DB2X 14 GT 90,00% DBDFULL BUFFER POOL HIT RATIO SYSTEM=SYSA,DB2ID=DB2X,BUFFER POOL=BP0 10 LT 80 BPHIRA BUFFER POOL HIT RATIO SYSTEM=SYSA,DB2ID=DB2X,BUFFER POOL=BP1 9 LT 80 BPHIRA BUFFER POOL HIT RATIO SYSTEM=SYSA,DB2ID=DB2X,BUFFER POOL=BP32K 9 LT 80 BPHIRA BUFFER POOL HIT RATIO SYSTEM=SYSA,DB2ID=DB2X,BUFFER POOL=BP8K 9 LT 80 BPHIRA BUFFER POOL RESIDENC Y TIME SYSTEM=SYSA,DB2ID=DB2X,BUFFER POOL=BP0 8 LT 5,0min BPRESTM BUFFER POOL RESIDENC Y TIME SYSTEM=SYSA,DB2ID=DB2X,BUFFER POOL=BP8K 8 LT 5,0min BPRESTM EDM POOL C T HIT RATIO SYSTEM=SYSA,DB2ID=DB2X 1 LT 70 C THIRA DBD POOL FAILURES SYSTEM=SYSA,DB2ID=DB2X 1 GT 0 DBDFAIL EDM POOL PT HIT RATIO SYSTEM=SYSA,DB2ID=DB2X 1 LT 70 PTHIRA NUMBER OF TIMEOUTS SYSTEM=SYSA,DB2ID=DB2X 1 GT 0 TIMEOUT 14

15 Critical Events DB2X BY HOUR - TUE, 23 OCT 2012 DB2ID SYSTEM EVENTS MAX DB2X SYSA LOG_BUFFER_WAITS DB2X SYSA DBD_POOL_FAIL CRITICAL EVENTS - DB2X - SYSA DATE DAY DBD POOL DYN POOL EDM POOL EDM POOL LOG BUFFER LOG BUFFER SKEL POOL WAITS DBAT WAITS NODBAT FAIL FAIL ABOVE FAIL FAIL PAGED IN WAITS FAIL THREAD THREAD 23/10/2012 TUE /10/2012 MON /10/2012 FRI /10/2012 THU /10/2012 WED /10/2012 TUE /10/2012 MON /10/2012 FRI /10/2012 THU /10/2012 WED /10/2012 TUE /10/2012 MON /10/2012 FRI /10/2012 THU

16 Configuration Changes DB2 CHANGES - TUE, 23 OCT 2012 DATE INTERVAL SYSTEM DB2ID AREA OBJEC T PARAMETER STATUS NEW VALUE OLD VALUE 09/10/2012 8,55 SYSA DB2X DB2 C HANGES DB2=DB2X DBD POOL PAGES /10/2012 8,55 SYSA DB2X DB2 C HANGES DB2=DB2X DB2 RELEASE 10,1 9,1 09/10/2012 8,55 SYSA DB2X DB2 C HANGES DB2=DB2X DYN STMT POOL PAGES /10/2012 8,55 SYSA DB2X DB2 C HANGES DB2=DB2X EDM POOL ABOVE PAGES /10/2012 8,55 SYSA DB2X DB2 C HANGES DB2=DB2X EDM POOL PAGES /10/2012 8,55 SYSA DB2X DB2 C HANGES DB2=DB2X SKEL POOL PAGES /09/ ,48 SYSA DB2Y DB2 C HANGES DB2=DB2Y DBD POOL PAGES /09/ ,48 SYSA DB2Y DB2 C HANGES DB2=DB2Y DB2 RELEASE 10,1 9,1 29/09/ ,48 SYSA DB2Y DB2 C HANGES DB2=DB2Y DYN STMT POOL PAGES /09/ ,48 SYSA DB2Y DB2 C HANGES DB2=DB2Y EDM POOL ABOVE PAGES /09/ ,48 SYSA DB2Y DB2 C HANGES DB2=DB2Y EDM POOL PAGES /09/ ,48 SYSA DB2Y DB2 C HANGES DB2=DB2Y SKEL POOL PAGES /09/2012 9,35 SYSA DB2Z DB2 C HANGES DB2=DB2Z DB2 RELEASE 10,1 9,1 29/09/2012 9,35 SYSA DB2Z DB2 C HANGES DB2=DB2Z EDM POOL ABOVE PAGES /09/2012 9,35 SYSA DB2Z DB2 C HANGES DB2=DB2Z EDM POOL PAGES

17 Lockouts 17

18 Deadlock details 18

19 Timeout details 19

20 Timeout details 20

21 Buffer Pool Activity 21

22 Workloads 22

23 TOP by Connection type 23

24 TOP by Connection type totals 24

25 Over limit Packages 25

26 Accounting reports EPV provides the possibility to produce on demand Short and Long Accounting reports, in HTML pages, at summary or detail level for plans and packages running during a specific period of time This makes it possible to investigate in depth and easily the behaviour of these objects running in a DB2 subsystem in order to analyze performance problems and anomalies 26

27 Unique characteristics Licensing The EPV license is based on a onetime fee Licensing is based on the number of collected systems, and is not based on the power of the machine or the power used The first year s maintenance is included, but in subsequent years customers have only to pay the maintenance fee The maintenance fee includes all releases and new versions of the product 27

28 Unique characteristics Protection of investment There is no additional license fee if the customer wishes to switch from EPV for DB2 to EPV for DB2 Plus and viceversa There is no additional license fee if the customer changes the platform where EPV runs There is no additional license fee if the customer changes the type of database There is no additional license fee if the customer changes the publishing platform 28

29 Contacts S u p p o r t : epv.support@epvtech.com I n f o : epv.info@epvtech.com P a r t n e r s : laura.seror@epvtech.com M a r k e t i n g a n d S a l e s : mark.cohen@epvtech.com danilo.gipponi@epvtech.com fabio.ottaviani@epvtech.com 29