Transcript Document 9653161

Matakuliah
Tahun
: T0413
: 2009
DB2 Configuration
Pertemuan 2
DB2 Configuration
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Database Manager Configuration file (dbm cfg)
• Review configuration file
– get dbm cfg
• Update configuration file
– update dbm cfg using <parameter> <value>
– Eg: update dbm cfg using INTRA_PARALLEL YES
• Some parameters are dynamically changed, others
need a db2stop/db2start
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DBM CFG from the Control Center
Control Center > (expand) Instances folder > (right-click) Instance > Configure Parameters
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DB2 Configuration
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Database Configuration file (db cfg)
• Review configuration file
– get db cfg for <db alias>
or
– get db cfg (If already connected to a db)
• Update configuration file
– update db cfg for <db alias> using <parameter> <value>
– Eg: update db cfg for sample using CHNGPGS_THRESH
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• Some parameters are dynamically changed, others
need to “stop” and “start” a database
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DB CFG – From the Control Center
Control Center > (expand) All Databases folder > (right-click) Database > Configure Parameters
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DB2 Configuration
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The DB2 Registry
list variables set
for instance
list all available
variables for platform
sets a variable
list all currently
set variables
db2set
db2set –all
db2set –lr
db2set <parameter>=<value>
Eg: db2set db2comm=tcpip
A place to specify environment or platform specific settings
e.g. settings for RAID, optimizer paths not yet fully integrated,
communication protocols, environment specific performance enhancements
Settings can be applied to various levels
environment
instance
global (all instances)
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Example of DB2 Registry variables
• DB2COMM
– Specifies the communication managers that are started
when the database manager is started.
• DB2_EXTSECURITY
– On Windows, prevents unauthorized access to DB2 by
locking DB2 system files
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