DBCA templates - PGA and SGA using "percentageMemTOSGA" parameter

Question

Hi all,
I am trying to configure a DBCA template to perform silent database creations on servers at our client sites. The amount of RAM could vary from server to server. For this reason, I am specifying the following parameters:
customSGA=false
percentageMemTOSGA=70In principle, this works pretty well - my DB is created with a suitable value for SGA_TARGET based on the RAM available on the server. However, the value that it uses for PGA_AGGREGATE_TARGET is too small for our needs. From experience, we can get by with a smaller SGA, but we need a relatively large PGA.
I have tried specifying the parameter "pga_aggregate_target" in the template (and thus trying to "override" the decision of DBCA) but DBCA ignores my "hard-coded" value for this and sets pga_aggregate_target according to (presumably) some calculation based on:
- The amount of RAM available
- The value of "percentageMemTOSGA"
- Some "other" value which tells DBCA how to divide up the %age memory it will take between SGA and PGA
So, my question is:
Does anybody know how to effectively use both "percentageMemTOSGA", and:
EITHER:
* tell DBCA how to split the memory that it will use from RAM (in this case 70%) between pga_aggregate_target and sga_target (some parameter maybe like "percent_to_pga" and "percent_to_sga")
OR (not as useful but better than no control):
* specify explicitly a value (or percentage) for pga_aggregate_target, but leave the value of sga_target to be decided based on the percentageMemTOSGA
I hope I've explained that well enough...
Regards,
Ados

Answer 1

I've checked the help for dbca (I'm currently running from the command prompt in "silent" mode) and don't see anything about recording the creation - how would I do that? Or are you referring to using the GUI, creating a database, and then saving the template? If it's that, that's what I did first, then editing the template for my tests - I don't see the parameter(s) that I'm looking for in the template.Ados,
I did the same what you did. Run dbca in GUI mode and generate template only now in template file I see there is a parameter to set these value. For your reference I am posting the content of that file:
<?xml version = '1.0'?>
<DatabaseTemplate name="orcl" description="" version="10.2.0.3.0">
<CommonAttributes>
<option name="ISEARCH" value="false"/>
<option name="OMS" value="false"/>
<option name="JSERVER" value="true"/>
<option name="SPATIAL" value="true"/>
<option name="ODM" value="true">
<tablespace id="SYSAUX"/>
</option>
<option name="IMEDIA" value="true"/>
<option name="XDB_PROTOCOLS" value="true">
<tablespace id="SYSAUX"/>
</option>
<option name="ORACLE_TEXT" value="true">
<tablespace id="SYSAUX"/>
</option>
<option name="SAMPLE_SCHEMA" value="true"/>
<option name="CWMLITE" value="true">
<tablespace id="SYSAUX"/>
</option>
<option name="EM_REPOSITORY" value="true">
<tablespace id="SYSAUX"/>
</option>
<option name="HTMLDB" value="false"/>
</CommonAttributes>
<Variables/>
<CustomScripts Execute="false"/>
<InitParamAttributes>
<InitParams>
*<initParam name="pga_aggregate_target" value="808" unit="MB"/>*
<initParam name="processes" value="150"/>
<initParam name="db_recovery_file_dest_size" value="1024" unit="MB"/>
<initParam name="control_files" value="(&quot;{ORACLE_BASE}/oradata/{DB_UNIQUE_NAME}/control01.ctl&quot;, &quot;{ORACLE_BASE}/oradata/{DB_UNIQUE_NAME}/control02.ctl&quot;, &quot;{ORACLE_BASE}/oradata/{DB_UNIQUE_NAME}/control03.ctl&quot;)"/>
<initParam name="sga_target" value="1536" unit="MB"/>
<initParam name="compatible" value="10.2.0.3.0"/>
<initParam name="background_dump_dest" value="{ORACLE_BASE}/admin/{DB_UNIQUE_NAME}/bdump"/>
<initParam name="job_queue_processes" value="10"/>
<initParam name="db_name" value="orcl"/>
<initParam name="user_dump_dest" value="{ORACLE_BASE}/admin/{DB_UNIQUE_NAME}/udump"/>
<initParam name="dispatchers" value="(PROTOCOL=TCP) (SERVICE={SID}XDB)"/>
<initParam name="audit_file_dest" value="{ORACLE_BASE}/admin/{DB_UNIQUE_NAME}/adump"/>
<initParam name="db_domain" value=""/>
<initParam name="open_cursors" value="300"/>
<initParam name="db_block_size" value="8" unit="KB"/>
<initParam name="db_recovery_file_dest" value="{ORACLE_BASE}/flash_recovery_area"/>
<initParam name="undo_tablespace" value="UNDOTBS1"/>
<initParam name="core_dump_dest" value="{ORACLE_BASE}/admin/{DB_UNIQUE_NAME}/cdump"/>
<initParam name="remote_login_passwordfile" value="EXCLUSIVE"/>
<initParam name="undo_management" value="AUTO"/>
<initParam name="db_file_multiblock_read_count" value="16"/>
</InitParams>
<MiscParams>
<databaseType>MULTIPURPOSE</databaseType>
<maxUserConn>20</maxUserConn>
<percentageMemTOSGA>40</percentageMemTOSGA>
<customSGA>true</customSGA>
<archiveLogMode>false</archiveLogMode>
<initParamFileName>{ORACLE_BASE}/admin/{DB_UNIQUE_NAME}/pfile/init.ora</initParamFileName>
</MiscParams>
<SPfile useSPFile="true">{ORACLE_HOME}/dbs/spfile{SID}.ora</SPfile>
</InitParamAttributes>
<StorageAttributes>
<DataFiles>
<Location>{ORACLE_HOME}/assistants/dbca/templates/Seed_Database.dfb</Location>
<SourceDBName>seeddata</SourceDBName>
<Name id="1" Tablespace="SYSTEM" Contents="PERMANENT" Size="480" autoextend="true" blocksize="8192">{ORACLE_BASE}/oradata/{DB_UNIQUE_NAME}/system01.dbf</Name>
<Name id="2" Tablespace="UNDOTBS1" Contents="UNDO" Size="25" autoextend="true" blocksize="8192">{ORACLE_BASE}/oradata/{DB_UNIQUE_NAME}/undotbs01.dbf</Name>
<Name id="3" Tablespace="SYSAUX" Contents="PERMANENT" Size="240" autoextend="true" blocksize="8192">{ORACLE_BASE}/oradata/{DB_UNIQUE_NAME}/sysaux01.dbf</Name>
<Name id="4" Tablespace="USERS" Contents="PERMANENT" Size="5" autoextend="true" blocksize="8192">{ORACLE_BASE}/oradata/{DB_UNIQUE_NAME}/users01.dbf</Name>
</DataFiles>
<TempFiles>
<Name id="1" Tablespace="TEMP" Contents="TEMPORARY" Size="20">{ORACLE_BASE}/oradata/{DB_UNIQUE_NAME}/temp01.dbf</Name>
</TempFiles>
<ControlfileAttributes id="Controlfile">
<maxDatafiles>100</maxDatafiles>
<maxLogfiles>16</maxLogfiles>
<maxLogMembers>3</maxLogMembers>
<maxLogHistory>1</maxLogHistory>
<maxInstances>8</maxInstances>
<image name="control01.ctl" filepath="{ORACLE_BASE}/oradata/{DB_UNIQUE_NAME}/"/>
<image name="control02.ctl" filepath="{ORACLE_BASE}/oradata/{DB_UNIQUE_NAME}/"/>
<image name="control03.ctl" filepath="{ORACLE_BASE}/oradata/{DB_UNIQUE_NAME}/"/>
</ControlfileAttributes>
<RedoLogGroupAttributes id="1">
<reuse>false</reuse>
<fileSize unit="KB">51200</fileSize>
<Thread>1</Thread>
<member ordinal="0" memberName="redo01.log" filepath="{ORACLE_BASE}/oradata/{DB_UNIQUE_NAME}/"/>
</RedoLogGroupAttributes>
<RedoLogGroupAttributes id="2">
<reuse>false</reuse>
<fileSize unit="KB">51200</fileSize>
<Thread>1</Thread>
<member ordinal="0" memberName="redo02.log" filepath="{ORACLE_BASE}/oradata/{DB_UNIQUE_NAME}/"/>
</RedoLogGroupAttributes>
<RedoLogGroupAttributes id="3">
<reuse>false</reuse>
<fileSize unit="KB">51200</fileSize>
<Thread>1</Thread>
<member ordinal="0" memberName="redo03.log" filepath="{ORACLE_BASE}/oradata/{DB_UNIQUE_NAME}/"/>
</RedoLogGroupAttributes>
</StorageAttributes>
</DatabaseTemplate>
Regards.