Where Did My Cpu Go?

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Where Did My Cpu Go?

  1. 1. “Where  did  my  CPU  go?”   monitoring  &  capacity  planning   adventures  on  a  consolidated   environment   Presented  by:     Karl  Arao   1
  2. 2. whoami   Karl  Arao   •  Senior  Technical  Consultant  @  Enkitec   •  Performance  and  Capacity  Planning  Enthusiast       7  years  DBA  experience   Oracle  ACE,  OCP-­‐DBA,  RHCE,  OakTable   Blog:  karlarao.wordpress.com   Wiki:  karlarao.Oddlyspot.com   TwiPer:  @karlarao     www.enkitec.com   2  
  3. 3. www.enkitec.com   3   100+ 3
  4. 4. Agenda   •  HOWTO  compare  CPU  speeds     •  Cores  vs  Threads   •  The  different  CPU  events   •  CPU  Monitoring/Capacity  Planning  on  consolidated  environments       www.enkitec.com   4  
  5. 5. www.enkitec.com   5   12:27:15 SYS@DEMO1> show parameter cpu_count! ! NAME TYPE VALUE! ------------------------------------ ----------- --------! cpu_count integer 16!
  6. 6. www.enkitec.com   6   Socket0 Core0 CPU0 CPU8 Core1 CPU1 CPU9 Core2 CPU2 CPU10 Core3 CPU3 CPU11 Socket1 Core0 CPU4 CPU12 Core1 CPU5 CPU13 Core2 CPU6 CPU14 Core3 CPU7 CPU15 Exadata  V2  =>  2s8c16t  
  7. 7. PART1:  compare  CPU  speeds   www.enkitec.com   7  
  8. 8. Different  methods:   •  Published  benchmarks   – TPC-­‐C   – SPECint_rate2006   •  Actual  Benchmarking   – cputoolkit   – SLOB  (lio  test)   www.enkitec.com   8  
  9. 9. TPC-­‐C   •  TransacOon  Processing  Performance  Council  (TPC)   •  Throughput  =>  transacOons  per  minute  (tpmC)   •  Price/Performance  =>  USD  /  tpmC   www.enkitec.com   9   •  CPU  performance  =>  tpmC  /  core   •  1609186.39  /  16  =  100574  
  10. 10. SPECint_rate2006   •  Standard  Performance  EvaluaOon  CorporaOon  (SPEC)   •  SPECint_rate2006     •  Integer  performance   •  All  CPUs  are  used   •  Used  by  OEM12c  ConsolidaOon  Planner  (SYSMAN.EMCT_SPEC_RATE_LIB)   •  CPU  performance  =>  SPECint_rate2006/core   •  702/16  =  43.875   www.enkitec.com   10   $ cat spec.txt | grep -i sun | grep -i x3-2 | sort -rnk1! 44.0625, 16, 2, 8, 2, 632, 705, Oracle Corporation, Sun Blade X3-2B (Intel Xeon E5-2690 2.9GHz)! 44.0625, 16, 2, 8, 2, 630, 705, Oracle Corporation, Sun Server X3-2L (Intel Xeon E5-2690 2.9GHz)! 43.875, 16, 2, 8, 2, 628, 702, Oracle Corporation, Sun Server X3-2 (Intel Xeon E5-2690 2.9GHz)! !
  11. 11. 2007  vs  2012   www.enkitec.com   11   tpmC/core, System, tpmC, Price/Perf, Total System Cost, Currency, Database Software, Server CPU Type, Total Server Cores, Cluster, Date Submitted Result/# Cores, # Cores, # Chips, # Cores Per Chip, # Threads Per Core, Baseline, Result, Hardware Vendor, System
  12. 12. Actual  Benchmarking   •  cputoolkit  and  SLOB  (lio  test)   •  LIOs/sec   www.enkitec.com   12   CPU1   CPU2   CPU3   CPU4   CPU5   CPU6   CPU7   CPU8   CPU1   CPU2   CPU3   CPU4   CPU5   CPU6   CPU7   CPU8   cputoolkit   ./runcputoolkit-­‐auto  <start  CPU>  <end  CPU>  <db  name>   ./runcputoolkit-­‐auto  1  2  dw   SLOB   ./runit.sh  <writers>  <readers>   while  :;  do  ./runit.sh  0  2;  done   Both  at  25%     CPU  uElizaEon  
  13. 13. V2  and  X2  CPU  perf  comparison   www.enkitec.com   13   3.6M LIOs/sec 2.1M LIOs/sec
  14. 14. V2  -­‐>  X2  migraOon   www.enkitec.com   14   chip  efficiency  factor    =  (source  LIOs/sec)  /  (desOnaOon  LIOs/sec)                                                                                =  2.1M  /  3.6M                                                                                =  .5833     X2  CPU  requirement      =  source  host  CPUs  *  uOlizaOon  *  chip  efficiency  factor                                                                                =  16  *  .46                                                                                  =  7.36    *  .5833                                                                                =  4.29  CPUs     X2  CPU  UOlizaOon              =  CPU  requirement  /  CPU  capacity                                                                                =  4.29  /  24                                                                                =  17.8  %     V2 X2
  15. 15. PART2:  Cores  vs  Threads   www.enkitec.com   15   Socket0 Core0 Core1 Core2 Core3 Socket0 Core0 CPU1 CPU5 Core1 CPU2 CPU6 Core2 CPU3 CPU7 Core3 CPU4 CPU8
  16. 16. www.enkitec.com   16  
  17. 17. ~30%  depends  on  the  workload   www.enkitec.com   17   cputoolkit   SLOB   17%   21%   Intel HT Technology Technical User's Guide http://goo.gl/3Ec5Z
  18. 18. PART3:  Different  CPU  events   CPU   CPU  Wait   CPU  Scheduler     www.enkitec.com   18  
  19. 19. www.enkitec.com   19   AAS  CPU  
  20. 20. www.enkitec.com   20  
  21. 21. CPU  Wait   www.enkitec.com   21  
  22. 22. www.enkitec.com   22  
  23. 23. CPU  Scheduler   www.enkitec.com   23  
  24. 24. www.enkitec.com   24  
  25. 25. www.enkitec.com   25   Pupng  it  all  together   Instances  Caged   at  12  CPUs   SQL  Applied  to  lock   in  good  plan.   Problem:  A  single  SQL  Stmt.  overwhelming   CPU  resources.  
  26. 26. PART4:  CPU  monitoring  and   Capacity  Planning     www.enkitec.com   26  
  27. 27. OS  Tools   •  The  usual  OperaOng  System  commands   –  vmstat   –  top   –  mpstat  –P  ALL  1  5   •  Cool  tools     –  collectl  –sC    (hPp://collectl.sourceforge.net)   –  turbostat.c   –  dcli  (Exadata)   •  dcli  -­‐l  oracle  -­‐g  /home/oracle/dbs_group  -­‐-­‐vmstat  2   •  dcli  -­‐l  oracle  -­‐g  /home/oracle/dbs_group  upOme   www.enkitec.com   27  
  28. 28. www.enkitec.com   28   Load  Map  
  29. 29. www.enkitec.com   29   Performance  Page  –  Historical  View  
  30. 30. AWR  Toolkit   •  DIY  performance  data  warehouse   www.enkitec.com   30   run_awr   run_extract   Extract  AWR  data  points  as  csv  files   Package  all  the  csv  files  Customer  site   FRESH_LOAD   CHECK_LOAD   DELTA_LOAD   Create  new  client  “dimension”  tables   Check  new  data  points   Load  new  data  points   DIY  DW  server   awr_topevents_(ClientNameX)   awr_cpuwl_(ClientNameX)   awr_iowl_(ClientNameX)   1 2 3 Tableau  AnalyOcs   awr_topevents_(ClientNameY)   awr_cpuwl_(ClientNameY)   awr_iowl_(ClientNameY)   awr_topevents_(ClientNameZ)   awr_cpuwl_(ClientNameZ)   awr_iowl_(ClientNameZ)  
  31. 31. www.enkitec.com   31  
  32. 32. •  Tableau  auto  creates  a  Ome  dimension  for  the  Ome   column  “MM/DD/YY  HH24:MI:SS”  of  AWR  csv   output   www.enkitec.com   32  
  33. 33. www.enkitec.com   33   •  Summary  and  Underlying  data   1-­‐2AM   2-­‐3AM  
  34. 34. www.enkitec.com   34   CPU  usage  across  half  rack  Exadata  
  35. 35. www.enkitec.com   35   CPU  usage  per  host  
  36. 36. www.enkitec.com   36   CPU  redistribuOon  across  nodes  
  37. 37. Wrap  up!   •  HOWTO  compare  CPU  speeds   o  SPECint_rate2006,  TPC-­‐C,  Actual  benchmarking     •  Cores  vs  Threads   o  Always  have  HT  on   o  ~30%  performance  benefit  auer  core  count   •  The  different  CPU  events   o  1  AAS  CPU  =  1  CPU  core   o  Oracle  CPU  may  not  correlate  with  Host  CPU  if  you  have  a  lot  of   CPU  acOvity  outside  of  the  database     •  CPU  Monitoring/Capacity  Planning  on  consolidated  environments   o  AWR  analyOcs   www.enkitec.com   37  
  38. 38. Resources   •  cputoolkit  -­‐  hPp://karlarao.wordpress.com/scripts-­‐resources/   •  AWR  Tableau  and  R  toolkit  VisualizaOon  Examples  -­‐  hPp://goo.gl/xZHHY   •  AAS  invesOgaOon  -­‐  hPp://goo.gl/5WaAg   •  Cores  vs  Threads  -­‐  hPp://goo.gl/1MLFf   •  Turbostat.c  -­‐  hPp://goo.gl/jDUKg   •  cpu_topology  -­‐  hPp://goo.gl/EUDG7   •  CPU  centric  benchmark  comparisons  -­‐  hPp://goo.gl/nR9Yy   •  SLOB  -­‐  hPp://goo.gl/yKa45   •  Kyle  Hailey  -­‐  hPp://dbopOmizer.com/2011/07/21/oracle-­‐cpu-­‐Ome/   •  The  mindmap  of  this  presentaOon  -­‐  hPp://goo.gl/XeY0e   www.enkitec.com   38   karl.arao@enkitec.com  
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