Dataset is fetched from cache but still takes same time to fetch records as first run

[Sumeet Shukla <sumeet.k.shukla@xxxxxxxxx>]

Both the first run and subsequent run takes same amount of time.

First Run:

"Seq Scan on d_payer (cost=0.00..8610.40 rows=121788 width=133) (actual time=8.760..98.582 rows=121788 loops=1)"
" Buffers: shared read=2521"
"Planning time: 16.820 ms"
"Execution time: 108.626 ms"

Second Run:

"Seq Scan on d_payer (cost=0.00..8610.40 rows=121788 width=133) (actual time=0.010..18.456 rows=121788 loops=1)"
" Buffers: shared hit=2521"
"Planning time: 0.083 ms"
"Execution time: 27.288 ms"

Can anyone please help me understand and fix this.

Thanks & Regards,

Sumeet Shukla