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From: Alexander Lakhin <[email protected]>
To: TAKATSUKA Haruka <[email protected]>
Cc: Hayato Kuroda (Fujitsu) <[email protected]>
Cc: pgsql-hackers <[email protected]>
Cc: Shlok Kyal <[email protected]>
Cc: [email protected]
Subject: Re: [Buildfarm:84] Re: stats.sql might fail due to shared buffers also used by parallel tests
Date: Wed, 23 Jul 2025 23:00:00 +0300
Message-ID: <[email protected]> (raw)
In-Reply-To: <[email protected]>
References: <[email protected]>
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	<[email protected]>

Hello Takatsuka-san,

23.07.2025 08:48, TAKATSUKA Haruka wrote:
> Hello Alexander,
>
> On Wed, 23 Jul 2025 00:55:37 +0000
> Yugo Nagata - Buildfarm<[email protected]> wrote:
>
>>> Nagata-san, could you please share the configuration of hamerkop? If it's
>>> running inside VM, what virtualization software is used?
> It's vmware ESXi 7.0.3 (21930508).
> This Windows enable auto-synchronize with 'time.windows.com'.
> VMware Tools 12.1.5 build 20735119 is installed in the VM.

Thank you for your prompt response!

I used VirtualBox, not VMWare, when trying to reproduce the issue, maybe
that's the reason why I failed. It looks like VMWare has it's own
specifics related to timekeeping: [1].

Maybe you could try tools.syncTime = "0" by any chance?

There is also an interesting note in VMware Tools 11 docs [2]:
If the clock on the guest operating system is ahead of the clock on the
host, VMware Tools causes the clock on the guest to run more slowly until
the clocks are synchronized.

But still it's hard to say without experimentation whether this can cause
the observed effect.

[1] https://knowledge.broadcom.com/external/article?legacyId=1318
[2] 
https://techdocs.broadcom.com/us/en/vmware-cis/vsphere/tools/11-1-0/vmware-tools-administration-11-1...

Best regards,
Alexander

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