Re: IO scheduler recommendation

[Imre Samu <pella.samu@xxxxxxxxx>]

Phoronix website has some performance testing.

for example:  (2018 Dec)  "Linux 4.20 I/O Scheduler Benchmarks On NVMe SSD Storage"

https://www.phoronix.com/scan.php?page=article&item=linux-420-io&num=3

"BFQ also picked up wins on the Samsung 970 EVO SSD when running the PostgreSQL database server."

(2017)"Linux 4.12 I/O Scheduler Benchmarks: BFQ, Kyber, Etc"

https://www.phoronix.com/scan.php?page=article&item=linux-412-io&num=3

"The default CFQ I/O scheduler on this SATA 3.0 SSD system remained the fastest for this PostgreSQL benchmark."

Imre

AB_ba# <bharti.anup@xxxxxxxxx> ezt írta (időpont: 2019. jan. 21., H, 12:05):

Hello ,

I searched the complete PostgreSQL Documentation but didn't get anything with respect to IO scheduler recommendation.

What is being recommended by PostgreSQL ?

Which is the best IO scheduler considering the Data is hosted on NFS?

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Thanks and Regards
ANUP BHARTI