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Date:      Fri, 23 Feb 2024 12:58:07 -0500
From:      mike tancsa <mike@sentex.net>
To:        "Bjoern A. Zeeb" <bzeeb-lists@lists.zabbadoz.net>, freebsd-fs@freebsd.org
Subject:   Re: really slow problem with nvme
Message-ID:  <976b175e-4bef-4a87-99f6-bf71a1c69e5d@sentex.net>
In-Reply-To: <5n117579-8259-3on3-90pn-79o8n52q4q32@yvfgf.mnoonqbm.arg>
References:  <5n117579-8259-3on3-90pn-79o8n52q4q32@yvfgf.mnoonqbm.arg>

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On 2/23/2024 12:46 PM, Bjoern A. Zeeb wrote:
> Hi,
>
> this is a Samsung SSD 970 EVO Plus 1TB nvme and gpart and newfs
> were already slow (it took like two hours for newfs).
>
> Here's another example now:
>
> # /usr/bin/time mkdir foo
>         1.82 real         0.00 user         0.00 sys
>
> How does one debug this?
>
Hi Bjoern,

     Can you do a destructive trim(8) to the device first to see if that 
makes a difference ? I had a similar oddly slow (although not as slow as 
your nvme) device that was fixed with a trim

     ---Mike




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