After upgrade magento from 1.4.0.1 to 1.6.2.0
In Phpmyadmin I just notice the size of core_session table grows fast than normal
I trustate data in core_session now , before , it reach 450MB and 250MB ….
Unknow what happen , at last have to ask a friend , he told me :
We do not recommend storing sessions in the database unless running a multi-store. You should see a performance benefit from storing sessions in the file-system. You can do this by editing your app/etc/local.xml, line 51 below.
<session_save><![CDATA[db]]></
session_save> Change to:
<session_save><![CDATA[files]]
></session_save> You may need to clear var/cache and can potentially truncate the core_session table subsequent to this change. This will be our only recommended solution to the issue you are describing.
I do according he says , it is work !



