January 2019
Beginner
556 pages
14h 19m
English
Content preview from Learning PostgreSQL 11 - Third Edition
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Connection pooling
Establishing a connection to a database can be quite expensive. It implies the connection on the network level and handshaking, authentication, and allocating server resources for the new session. Imagine a web application that would connect to a database for each request from users, perform a query, and disconnect. It could take milliseconds, but when the number of requests is huge, in total it can take a lot of time. If these requests are processed simultaneously, it can happen that too many connections are created and the database server is overloaded because each connection consumes resources from the server, and even if the sessions do nothing, the number of them is always limited.
In web applications (and not only ...
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