I am working on PostgreSQL 8.0.2. with slony I. 

Whenever there is a update, insert, delete happened on primary it will take 
some time to replicate the same on slave. We came to know about this using 
sl_status table, where its lagging time showing 1 hr or 2 hrs. However, 
sl_confirm table shows last replicated events is before 5 mins.
We have also seen there is vacuum analyze running on replications schema.   

Can someone point me where should i look into and how to improve replication 
performance. 

As of now there is no chance for upgradation of version. 

--
Dj



      
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