PostgreSQL Understanding Shared Buffers 02/12
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When there are thousands of users trying to read or write data to many different tables, reading from the files will result in a poor, non-scalable system. The reads and writes will result in searching for many files, opening these files, looking for specific data records, locking, editing, and unlocking. To make this a lot more scalable and faster, the concept of shared buffers is introduced.
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