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Software Engineering vocabulary · Databases and Persistence

Connection pool

Meaning in software engineering, with examples

nounCommon term

In software engineering, connection pool means: A set of open database connections that an application keeps ready and reuses, instead of opening a new, slow connection for every request.

In Turkish: bağlantı havuzu

How it is used

Built into most frameworks (HikariCP in Java, for example) or run as a separate tool such as PgBouncer. Common problems are 'pool exhausted' errors when all connections are busy and too many pools overloading the database's connection limit.

Example sentences

  1. Requests are timing out because the connection pool has only ten connections.

  2. Each service has its own connection pool, so together they open 800 connections.

Common collocations

  • connection pool size
  • pool exhausted
  • connection pooling
  • max connections
  • query tuningThe work of making slow queries faster by studying their execution plans and then adding indexes, rewriting SQL or changing database settings.
  • slow queryA query that takes longer than an agreed limit to finish, slowing down the application and using up database resources.
  • ORMObject-relational mapping: a library that lets developers work with database rows as objects in their programming language and generates the SQL for them.
  • DBADatabase administrator: the person responsible for installing, securing, backing up, tuning and keeping a company's databases running.

This word in other fields

The same English word can have a different meaning in another field:

More terms: Databases and Persistence

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