Siddharth Shah wrote:

Hello All,
How Postgres Maintains data in Shared Buffer

Does It maintains queried data in memory or table data and Next time how postgres fetch data from memory
rather than disk
Which algorithm is used for storing data how data is indexed in shared buffers

Thanks
Siddharth
Take a look at

http://www.westnet.com/~gsmith/content/postgresql/InsideBufferCache.pdf

http://postgresql.mirrors-r-us.net/files/documentation/books/aw_pgsql/hw_performance/node3.html

--Ashish

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