Tip

Saving time on nightly table rebuilds

We have several large tables that are rebuilt each evening into a new database. The size does not vary dramatically week to week, so we use the dbms_stats package to import and export the statistics on these tables each night, and only gather the statistics once per week. The code below does the weekly analyze; reset_table_stats is used as a customer deletes and gathers statistics using dbms_stats package. This script was tested on Oracle 8.1.7.4. 
spool /oemmaint/qa_out/fcra_analyze.out2
delete from analyzedb.stat_table where statid in
('ASSN_FCRA','ESLL_FCRA','ESLC_FCRA','ASSN_LOA_FCRA');
commit;
exec analyzedb.reset_table_stats('APPTMGR','ASSOCIATION_LOA')
exec analyzedb.reset_table_stats('APPTMGR','ASSOCIATION')
exec analyzedb.reset_table_stats('LICMGR','ENTITY_STATE_LICENSE_LOA')
exec analyzedb.reset_table_stats('LICMGR','ENTITY_STATE_LICENSE_CLASS')
exec
dbms_stats.export_table_stats('APPTMGR','ASSOCIATION',NULL,'STAT_TABLE',
'ASSN_FCRA',TRUE,'ANALYZEDB');
exec
dbms_stats.export_table_stats('LICMGR','ENTITY_STATE_LICENSE_LOA',NULL,'
STAT_TABLE','ESLL_FCRA',TRUE,'ANALYZEDB');
exec
dbms_stats.export_table_stats('LICMGR','ENTITY_STATE_LICENSE_CLASS',NULL
,'STAT_TABLE','ESLC_FCRA',TRUE,'ANALYZEDB');
exec
dbms_stats.export_table_stats('APPTMGR','ASSOCIATION_LOA',NULL,'STAT_TAB
LE','ASSN_LOA_FCRA',TRUE,'ANALYZEDB');
delete from analyzedb.stat_table@&DESTDB where statid in
('ASSN_FCRA','ESLL_FCRA','ESLC_FCRA','ASSN_LOA_FCRA');
commit;
insert into analyzedb.stat_table@&DESTDB

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 (select * from
analyzedb.stat_table where statid in (
'ASSN_FCRA','ESLL_FCRA','ESLC_FCRA','ASSN_LOA_FCRA'));
commit;
exit

This was first published in July 2004

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