1) Check for anti-virus scan running.
2) Check for disk fragmentation or defrag running.
3) Check memory utilization, high use of the page file can indicate a shortage of memory.
4) Check for the existence of vss shadow copies and delete any unneeded instances.
Users can also make below changes in postgresql.conf file which is found in the NetVault server installation directory. Eg. C:\Program Files (x86)\Quest\NetVault Backup\db\pgsql
max_connections = 400
shared_buffers = 64MB
By default shared buffer value is 32 but we suggest 64 to help in the performance.