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help / color / mirror / Atom feedFrom: Bruce Momjian <[email protected]>
To: PostgreSQL-development <[email protected]>
Subject: effective_io_concurrency and NVMe devices
Date: Tue, 19 Apr 2022 22:56:05 -0400
Message-ID: <[email protected]> (raw)
NVMe devices have a maximum queue length of 64k:
https://blog.westerndigital.com/nvme-queues-explained/
but our effective_io_concurrency maximum is 1,000:
test=> set effective_io_concurrency = 1001;
ERROR: 1001 is outside the valid range for parameter "effective_io_concurrency" (0 .. 1000)
Should we increase its maximum to 64k? Backpatched? (SATA has a
maximum queue length of 256.)
--
Bruce Momjian <[email protected]> https://momjian.us
EDB https://enterprisedb.com
Indecision is a decision. Inaction is an action. Mark Batterson
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