Re: Searching in varchar column having 100M records

Sergei Kornilov <[email protected]>
Newsgroups gmane.comp.db.postgresql.performance
Message-ID <[email protected]> 
Hello

Please recheck with track_io_timing = on in configuration. explain (analyze,buffers) with this option will report how many time we spend during i/o

>   Buffers: shared hit=2 read=31492

31492 blocks / 65 sec ~ 480 IOPS, not bad if you are using HDD

Your query reads table data from disks (well, or from OS cache). You need more RAM for shared_buffers or disks with better performance.

regards, Sergei
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