This document summarizes a session on tuning Oracle GoldenGate performance between an Oracle source and target database. It discusses tools for monitoring GoldenGate performance such as lag reports, process statistics, and database views. It also provides a case study example configuration and recommendations for tuning integrated extract and replicat parameters such as parallelism settings.

1. IOUG Collaborate 2015
Session: 206
Date: 4/15/2015 @ 10:45 am
Room: Palm D
Extreme Replication:
Performance Tuning Oracle GoldenGate
(Oracle to Oracle Integrated Replication)

2. @dbasolved
http://dbasolved.com
Work: bobby.l.curtis@accenture.com
Personal: curtisbl@gmail.com
Bobby Curtis
Douglasville, Georgia
Infrastructure Principle
IOUG (RACSIG/DI SIG), RMOUG, GAOUG

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6. ① Oracle GoldenGate Overview
② Tuning Areas and Tools
③ Case Study
④ Recommendations
⑤ Improvements?
⑥ Q&A

7. Oracle GoldenGate Overview

8. Change Data Capture
(CDC)
Oracle Advance
Replication
Oracle Streams Oracle GoldenGate
• Multi-Master Replication
• MV Replication
• Hybrid Replication
• Synchronous
• Asynchronus
• Capture Messages
• Staging Messages
• Consumption
• Heterogeneous
• Multiple Architectures
• Multiple Use Cases
Quick History

9. What is GoldenGate?

10. How does GoldenGate work?

11. How Oracle GoldenGate Works
Capture
Trail
Files
Pump
Delivery
Trail
Files
Capture (extract): committed transactions are captured (and can be filtered) as they occur by reading the transaction logs. As of
V.11.2.1, GoldenGate offers two options for capture for Oracle; Classic & Integrated Capture
Trail: stages and queues data for routing.
Pump: distributes data for routing to target(s).
Route: data is compressed, encrypted for routing to target(s).
Delivery: applies data with transaction integrity. New with
GoldenGate 12c, Integrated Delivery (replicat).
MGRMGR

12. How Oracle GoldenGate Works
Capture
Trail
Files
Pump
Delivery
Trail
Files
Capture (extract): committed transactions are captured (and can be filtered) as they occur by reading the transaction logs. As of
V.11.2.1, GoldenGate offers two options for capture for Oracle; Classic & Integrated Capture
Trail: stages and queues data for routing.
Pump: distributes data for routing to target(s).
Route: data is compressed, encrypted for routing to target(s).
Delivery: applies data with transaction integrity. New with
GoldenGate 12c, Integrated Delivery (replicat).
Trail
Files
Trail
FilesDelivery Pump Capture

13. Integrated Extract
• Introduced in GoldenGate 11.2.0.2
• Integrated Extract for Oracle source databases only
• Database release: 11.2.0.3 and later
• Works with Logminer
• Register Extract (capture) with database/logminer required
Example: GGSCI> register extract [ name ] database container [ (PDB) ]
Trail
Files
Capture
Oracle Database

14. Logmining Server
Logmining Server
• Reader: Reads logfile and splits into regions
• Preparer: Scans regions of logfiles and prefilters
based on extract parameters
• Builder: Merges prepared records in SCN order
• Capture: Formats LCR and passes to GG Extract
Trail
Files
CaptureReader Builder Capture
Preparer
1Preparer
2Preparer
N
Extract
• Requests LCRs from logmining server
• Performs mapping and
transformations
• Writes trail file
Oracle Database

15. Integrated Replicat
• Introduced in GoldenGate 12.1.2
• Integrated Replicat for Oracle databases only
• Database release: 11.2.0.4, 12.1 and later
• Leverages database parallel apply servers
• Min. changes to replicat configuration
• Single Replicat, no partitioning needed (via @RANGE/THREAD or manual
partitioning)
Trail
Files
Delivery
Oracle Database

16. Integrated Replicat
Trail
Files
Lightweight Streaming
API
Delivery
Inbound Server
• Receiver: Reads LCR
• Preparer: Computes dependencies between
transactions (PK, FK, UK)
• Coordinator: Maintains the order between
transactions
• Applier: Applies transactions in order, including CDR
and error handling
Replicat
• Reads the trail file(s)
• Constructs logical change records
(LCR)
• Uses a lightweight streaming API to
transmit LCR to Oracle database
Receiver Preparer Coordinator
Apply
1Apply
2Apply
N
Oracle Database

17. Parallel Apply Processing
• Dependency scheduling based on PK, UI and FKs at
target (Oracle)
• COMMIT_SERIALIZATION
- DEPENDENT_TRANSACTIONS (default) – commit dependent
transactions in correct dependency
- Full – commited transactions in same order as source

18. Tuning Areas and Tools

19. Why should I care about performance?

20. What tools are available for performance tuning?

21. Oracle GoldenGate Performance Areas
Capture
Trail
Files
Pump Trail
Files Delivery
Host Host
Database Database
GoldenGate
GoldenGate
- MPSTAT, VMSTAT, IOSTAT, STRACE, TOP
- AWR, ASH, UTL_SPADV, TRACE
GG tools: LAG, REPORTCOUNT

22. GoldenGate Performance Tools
LAG Information
• Monitor latency from the Manager process (mgr.prm)
- LAGINFO [ SECONDS | MINUTES | HOURS ]
- LAGREPORT [ MINUTES | HOURS ]
- LAGCRITICAL [ SECONDS | MINUTES | HOURS]
EXAMPLE:
LAGINFOSECONDS 1
LAGREPORTMINUTES 1
LAGCRITICALSECONDS 2
• Information output to ggserr.log

23. GoldenGate Performance Tools
Report Files
• Parameters currently running
• Table/Column Mappings
• Runtime messages and errors
• Runtime statistics
• REPORTCOUNT
- REPORTCOUNT EVERY [ # ] [ SECONDS | MINUTES |
HOURS ], RATE
Example: REPORTCOUNT EVERY 15 MINUTES, RATE
• Files located in $OGG_HOME/dirrpt

24. Database Performance Tools
Automatic Workload Repository (AWR)
• Good starting point within the database
• Help determine potiential bottlenecks
• Extract/Replicat are given unique SQL Module IDs
- Used in both AWR and ASH
• Use Active Session History (ASH) for more details on
identified session

25. AWR Output – Replication Stats
Oracle 12c Database (12.1.0.1 and later)
Note: Will not be in 11.2.x AWR reports

26. Database Performance Tools
Streams Performance Advisor (Integrated Extract/Replicat Only)
• Used to provide information on the performance of integrated
processes
• Both Extract and Replicat
• Provides real-time statistics
• Has to be installed
- Installed under GoldenGate User
- $ORACLE_HOME/rdbms/admin/utlspadv.sql

27. Database Performance Tools (Views)
Run Time Views
• V$GOLDENGATE_CAPTURE
• V$GG_APPLY_RECEIVER
• V$GG_APPLY_READER
• V$GG_APPLY_COORDINATOR
• V$GG_APPLY_SERVER
• V$GOLDENGATE_TABLE_STATS
• V$GOLDENGATE_CAPABILITIES
• V$DBA_APPLY_ERRORS
Configuration Views
• DBA_GOLDENGATE_PRIVILEGES
• DBA_GOLDENGATE_SUPPORT_MODE
• DBA_CAPUTRE
• DBA_CAPTURE_PARAMETERS
• DBA_GOLDENGATE_INBOUND
• DBA_GG_INBOUND_PROGRESS
• DBA_APPLY
• DBA_APPLY_PARAMETERS
• DBA_APPLY_REPERROR_HANDLERS
• DBA_APPLY_HANDLE_COLLISIONS
• DBA_APPLY_DML_CONF_HANDLERS
Associated GoldenGate Monitoring Scripts

28. Health Checks
• SQL based scripts that create HTML output
- Different scripts for database releases
- MOS:1448324.1
• Summary
- Overview of environment
- Advice/Warnings of potential issues of configuration
• Analysis
- Compare configurations
- Performance Recommendations
- Detail information for diagnostic purposes
• Statistics
- Runtime information of Streams (GoldenGate) processing

29. Host Performance Tools
CPU Performance (mpstat/top)
• Looking to see if there are any processes limited by CPU (top)
• Looking to see what average cpu spike is (mpstat)
I/O Performance (iostat)
• Gather for database disks and trail file locations
• Critical before increasing parallelism
Memory Performance (vmstat)
• Not needed for integrated processes
• Needed if tuning classic or coordinated processes

30. Case Study

31. Capture Pump
Delivery
Trail
Files
Trail
Files
Server/Database Configs
Dell PowerEdge T110
Intel Core Duo
16G DRAM
Database:
SGA: 6GB
Dell PowerEdge T110 II
Intel i3
8G DRAM
Database:
SGA: 6GB

32. Oracle GoldenGate Performance Areas
Capture
Trail
Files
Pump Trail
Files Delivery
Host Host
Database Database
GoldenGate
GoldenGate
- MPSTAT, VMSTAT, IOSTAT, STRACE
- AWR, ASH, UTL_SPADV, TRACE
GG tools: LAG, REPORTCOUNT

33. Lag Information (OEM)
Approx. 1 hr. 20 min. behind
JAGENT 12.1.3/GG Plugin 12.1.0.2 is required

34. Lag Information
• ggserr.log
- Reported by Manager Process (mgr.prm)
- Extract (Source)
2015-02-11 15:32:12 INFO OGG-00948 Oracle GoldenGate
Manager for Oracle, mgr.prm: Lag for EXTRACT EXTI is 00:00:01
(checkpoint updated 00:00:07 ago).
- Replicat (Target)
2015-02-11 15:24:14 WARNING OGG-00947 Oracle GoldenGate
Manager for Oracle, mgr.prm: Lag for REPLICAT REPI is 01:18:50
(checkpoint updated 00:00:00 ago).

35. Process Statistics
EXTI.rpt
1068208 records processed as of 2015-02-11 15:30:25 (rate 57,delta 299)
PMPI.rpt
545130 records processed as of 2015-02-11 15:35:28 (rate 109,delta 281)
REPI.rpt
108483 records processed as of 2015-02-11 15:28:05 (rate 116,delta 120)
• Monitor throughput for each process
- REPORTCOUNT EVERY [ SECOND | MINUTES | HOURS ], RATE
- Can impact throughput with aggressive monitoring
Total records
processed this session
Throughput for session Changes since last
report count

36. Streams Performance Advisor
Extract
PATH 1 RUN_ID 1 RUN_TIME 2015-JAN-12 15:17:31 CCA Y
|<C> OGG$CAP_EXTI 31 31 0 LMR 99.7% 0% 0.3% "" LMP (2) 199.7% 0%
0.3% "" LMB 99.3% 0% 0.3% "" CAP 99.7% 0% 0.3% "" |<Q>
"GGATE"."OGG$Q_EXTI" 0.01 0.01 0 |<A> OGG$EXTI 0.01 0.01 0 |<B>
NO BOTTLENECK IDENTIFIED
Logminer Reader (LMR): 99.7% idle, no flow control, no top event
Logminer Preparer (LMP): 2, 199.7% idle, no flow control, no top event
Logminer Builder (LMB): 99.3% idle, no flow control, no top event
Capture (CAP): 99.3% idle, no flow control, no top event

37. Streams Performance Advisor
Replicat
PL/SQL procedure successfully completed.
SQL>
Advisor couldn’t gather required statistics

38. Performance (OEM View)
Capture Pump
Delivery
Trail
Files
Trail
Files

39. GoldenGate Configuration
Capture Pump
Delivery
Trail
Files
Trail
Files
--CHECKPARAMS
EXTRACT EXTI
SETENV
(ORACLE_HOME="/oracle/app/product/11.2.0.4/d
bhome_1")
SETENV (ORACLE_SID="bc11g")
USERID ggate, PASSWORD ggate
WARNLONGTRANS 15m, CHECKINTERVAL 5m
REPORTCOUNT EVERY 5 MINUTES, RATE
EXTTRAIL ./dirdat/li
TABLE SOE.ADDRESSES;
TABLE SOE.CARD_DETAILS;
TABLE SOE.CUSTOMERS;
TABLE SOE.INVENTORIES;
TABLE SOE.LOGON;
TABLE SOE.ORDER_ITEMS;
TABLE SOE.ORDERENTRY_METADATA;
TABLE SOE.ORDERS;
TABLE SOE.PRODUCT_DESCRIPTIONS;
TABLE SOE.PRODUCT_INFORMATION;
TABLE SOE.WAREHOUSES;
--CHECKPARAMS
EXTRACT PMPI
userid ggate password ggate
PASSTHRU
RMTHOST 192.168.65.68, MGRPORT 15000,
COMPRESS
RMTTRAIL ./dirdat/ri
REPORTCOUNT EVERY 1 MINUTES, RATE
TABLE SOE.ADDRESSES;
TABLE SOE.CARD_DETAILS;
TABLE SOE.CUSTOMERS;
TABLE SOE.INVENTORIES;
TABLE SOE.LOGON;
TABLE SOE.ORDER_ITEMS;
TABLE SOE.ORDERENTRY_METADATA;
TABLE SOE.ORDERS;
TABLE SOE.PRODUCT_DESCRIPTIONS;
TABLE SOE.PRODUCT_INFORMATION;
TABLE SOE.WAREHOUSES;
--CHECKPARAMS
REPLICAT REPI
SETENV
(ORACLE_HOME="/opt/oracle/app/product/12.1.0.
1/dbhome_1")
SETENV (ORACLE_SID="oemrep")
USERID ggate, PASSWORD ggate
ALLOWDUPTARGETMAP
ASSUMETARGETDEFS
REPORTCOUNT EVERY 5 MINUTES, RATE
DISCARDFILE ./dirrpt/REPCI.dsc, append,
megabytes 200
REPERROR(default, discard)
REPERROR(default2, discard)
MAP SOE.ADDRESSES, TARGET
SOE.ADDRESSES;
MAP SOE.CARD_DETAILS, TARGET
…..
MAP SOE.WAREHOUSES, TARGET
SOE.WAREHOUSES;

40. AWR Output – Replication Stats
LAG: 12.9 Minutes

41. Database Views
select capture_name, 86400 * (available_message_create_time -
capture_message_create_time) latency_in_seconds
from gv$goldengate_capture;
select r.apply_name, 86400 * (r.dequeue_time - c.lwm_message_create_time)
latency_in_seconds
from gv$gg_apply_reader r, gv$gg_apply_coordinator c
where r.apply# = c.apply#
and r.apply_name = c.apply_name;

42. Recommendations

43. Integrated Extract Parameters
• LOGALLSUPCOLS
- Instructs extract to write supplemental logged columns to trail file
• UPDATERECORDFORMAT
- Single Logical Change Record (LCR) with BEFORE and AFTER
images
- COMPACT
- reduces the amount of data sent with LCR

44. Integrated Extract Parameters
Continued
• PARALLELISM
- Controls number of preparers for processing logs
- Increase parallelism if preparers are CPU bound
- EE allows parallelism of preparers (default = 2)
- SE does not allow parallelism of preparers (default = 1)
• MAX_SGA_SIZE
- Controls amount of streams pool configured extract
- Min: 1024 (1G)/Max: 3584 (3.5G)

45. Integrated Replicat Parameters
• COMMIT_SERIALIZATION
- Default = DEPENDENT_TRANSACTIONS
- Set to FULL, if apply in source commit order is required
• EAGER_SIZE
- Threshold to begin apply of large transactions (default = 9500)
- Serializes apply processing
- Make sure streams_pool_size is configured correctly to avoid
Waiting for Memory issues
• MAX_SGA_SIZE
- Controls memory resource for IR
- Default is INFINITE

46. Integrated Replicat Parameters
Continued
• PARALLELISM
- Controls number of appliers (default = 4, actually 50)
- Setting to 1 disables parallism
• MAX_PARALLELISM
- Controls maximum number of appliers
- Default is 50 in OGG 12.1.2.1 (30 in OGG 12.1.2.0)
Note: Auto Tuning (parallelism)
- Enabled by default
- Computed over range of 5 intervals (5 seconds)
- Unneeded processes marked INACTIVE, removed after 5 minutes
- MAX_PARALLISM=PARALLELISM, disables auto turning

47. Integrated Replicat Parameters
Continued
• BATCHSQL
- Controls number of appliers (default = 4)
- Setting to 1 disables parallelism
- Use with caution
- Degradation can be seen in some cases.

48. Database Configurations
• ENABLE_GOLDENGATE_REPLICATION
- New in DB 11.2.0.4/12.1.0.2
- Boolean value. Default to False, set to True to activate
• STREAMS_POOL_SIZE
- Size appropriately for number of concurrent IE & IR processes
- Min. 1G per IE/IR then add 25%
- If using MAX_SGA_SIZE
- sum of (MAX_SGA_SIZE * IR) * 25%

49. Sizing Streams Pool
(MAX_SGA_SIZE * PARALLELISM) * 25%
(1024M * 2) * 25% = 2560M (2.5G)
Note: Max size of streams_pool_size should not exceed 3.5G
Note: May have to increase SGA size to allocate enough
memory

50. Database Object Tuning
• GoldeGate uses SQL to apply changes
• AWR highlights SQL and SEGMENT issues
• ADDM recommendations as needed
• Redo Logs, ensure they are large enough for expected
workload
• Gather statistics regularly, especially after initial initialization
• Target side: Indexes can cause slowness in apply process as
well.

51. Network Tuning
• TCPBUFSIZE and TCPFLUSHBYTES
• Use ping to find average round trip time (RTT)
[oracle@oel dirrpt]$ ping fred.acme.com
PING fred.acme.com (192.168.65.68) 56(84) bytes of data.
64 bytes from fred.acme.com (192.168.65.68): icmp_seq=1 ttl=64 time=0.180 ms
64 bytes from fred.acme.com (192.168.65.68): icmp_seq=2 ttl=64 time=0.173 ms
64 bytes from fred.acme.com (192.168.65.68): icmp_seq=3 ttl=64 time=0.199 ms
64 bytes from fred.acme.com (192.168.65.68): icmp_seq=4 ttl=64 time=0.203 ms
^C
--- fred.acme.com ping statistics ---
4 packets transmitted, 4 received, 0% packet loss, time 3807ms
rtt min/avg/max/mdev = 0.173/0.188/0.203/0.021 ms

52. Network Tuning
(megabits / gigabits) * RTT = Bandwidth-Delay Product (BDP in bytes)
BDP * 3 = TCPBUFSIZE/TCPFLUSHBYTES
(8192 / 8) * 0.021 = 21.5 bytes
21.5 bytes * 3 = 64.5 bytes
Since BDP result is less than 1MB, no need to set TCPBUFSIZE or TCPFLUSHBYTES
*Default is 1MB

53. Host
Evaluate if you need bigger/newer hardware if needed!

54. Improvements

55. Configuration
Capture Pump
Delivery
Trail
Files
Trail
Files
EXTRACT EXTI
SETENV
(ORACLE_HOME="/oracle/app/product/11.2.0.4/d
bhome_1")
SETENV (ORACLE_SID="bc11g")
USERID ggate, PASSWORD ggate
WARNLONGTRANS 15m, CHECKINTERVAL 5m
REPORTCOUNT EVERY 1 MINUTES, RATE
EXTTRAIL ./dirdat/li
TRANLOGOPTIONS EXCLUDEUSER GGATE
TRANLOGOPTIONS INTEGRATEDPARAMS
(MAX_SGA_SIZE 2560 PARALLELISM 4)
LOGALLSUPCOLS
UPDATERECORDFORMAT COMPACT
TABLE SOE.ADDRESSES;
TABLE SOE.CARD_DETAILS;
TABLE SOE.CUSTOMERS;
…..
TABLE SOE.PRODUCT_INFORMATION;
TABLE SOE.WAREHOUSES;
--CHECKPARAMS
EXTRACT PMPI
userid ggate password ggate
PASSTHRU
RMTHOST 192.168.65.68, MGRPORT 15000,
COMPRESS
RMTTRAIL ./dirdat/ri
REPORTCOUNT EVERY 1 MINUTES, RATE
TABLE SOE.ADDRESSES;
TABLE SOE.CARD_DETAILS;
TABLE SOE.CUSTOMERS;
TABLE SOE.INVENTORIES;
TABLE SOE.LOGON;
TABLE SOE.ORDER_ITEMS;
TABLE SOE.ORDERENTRY_METADATA;
TABLE SOE.ORDERS;
TABLE SOE.PRODUCT_DESCRIPTIONS;
TABLE SOE.PRODUCT_INFORMATION;
TABLE SOE.WAREHOUSES;
REPLICAT REPI
SETENV
(ORACLE_HOME="/opt/oracle/app/product/12.1.0.
1/dbhome_1")
SETENV (ORACLE_SID="oemrep")
USERID ggate, PASSWORD ggate
ALLOWDUPTARGETMAP
ASSUMETARGETDEFS
REPORTCOUNT EVERY 1 MINUTES, RATE
DISCARDFILE ./dirrpt/REPCI.dsc, append,
megabytes 200
REPERROR(default, discard)
REPERROR(default2, discard)
DBOPTIONS INTEGRATEDPARAMS
(MAX_SGA_SIZE 2560, PARALLELISM 4,
MAX_PARALLELISM 6,
COMMIT_SERIALIZATION FULL)
BATCHSQL
MAP SOE.ADDRESSES, TARGET
SOE.ADDRESSES;
……;
MAP SOE.WAREHOUSES, TARGET

56. Performance (OEM View)
Capture Pump
Delivery
Trail
Files
Trail
Files

57. Report Counts
EXTI.rpt
1015083 records processed as of 2015-02-14 01:49:21 (rate 90,delta 301)
1034022 records processed as of 2015-02-14 01:50:22 (rate 91,delta 310)
1052135 records processed as of 2015-02-14 01:51:22 (rate 92,delta 301)
PMPI.rpt
1033398 records processed as of 2015-02-14 01:50:20 (rate 91,delta 304)
1052112 records processed as of 2015-02-14 01:51:21 (rate 92,delta 310)
1069906 records processed as of 2015-02-14 01:52:21 (rate 93,delta 294)
REPI.rpt
122370 records processed as of 2015-02-14 01:40:33 (rate 502,delta 884)
188385 records processed as of 2015-02-14 01:41:34 (rate 620,delta 1099)
317619 records processed as of 2015-02-14 01:42:35 (rate 872,delta 2143)
Changes since last
report count

58. 0
500
1000
1500
2000
2500
EXTI
REPI
299
120
301
2143
Series1
Series2
Comparison
94.4% increase
in replicat
performance

59. STOP

60. Further Reading
• MOS Note: 1557031.1 – patches for integrated capture and replicat
• MOS Note: 1448324.1 – OGG Integrated Healthcheck Script
• MOS Note: 1485620.1 – Best Practices for Downstream Capture
• MOS Note: 1488668.1 – GoldenGate Performance Data Gathering
• Oracle GoldenGate Best Practices:
http://www.oracle.com/technetwork/database/availability/maa-gg-performance-
1969630.pdf

61. ((RUN 2 REP – RUN 1 REP) / RUN 2 REP) * 100
((2143 - 120) / 2143) * 100 = 94.40%
Replicat Improvement Ratio