[PERFORMANCE] Insights: fseek OR read_cluster?

From: Antonio Rodriges <rodriges(at)csm(dot)donntu(dot)edu(dot)ua>
To: pgsql-performance(at)postgresql(dot)org
Subject: [PERFORMANCE] Insights: fseek OR read_cluster?
Date: 2011-09-23 20:03:57
Message-ID: CAPrLoNeyDqHwsm80iVTDeUg8-pa+pG6D43K8O1_rG2o9KHBGLw@mail.gmail.com
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Hello,

It is interesting how PostgreSQL reads the tablefiie.
Whether its indexes store/use filesystem clusters locations containing
required data (so it can issue a low level cluster read) or it just
fseeks inside a file?

Thank you

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