Hello,

We have configured Solr index server on tomcat and fetch the data from database 
to index the data. We have implemented delta query indexing based on modify_ts.

In our data-config.xml we have a parent entity and 17 child entity. We have 18 
such solr cores. When we call delta-import on a core, it executes 18 SQL query 
to query database.

Each time delta-import is opening a new session onto database. Log-in and 
log-out though happening at a split second, we are finding millions of login 
and logout at database.

As per our DBA, login and logout are costly operation in terms of server 
resources.

Is there a way to reduce the number of  logins and logouts and have a 
persistent DB connection from solr?

Thanks and Regards,
Srinivas Kashyap

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