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From: David Mullineux <[email protected]>
To: Eric Schwarzenbach <[email protected]>
Cc: [email protected]
Subject: Re: can a blocked transaction affect the performance of one that is blocking it?
Date: Tue, 10 Dec 2024 09:22:37 +0000
Message-ID: <CAGsyd8X1b+EXzf8o2iYEnqHm6D-wZxzrUq_R_bHa9t8wFxMqyA@mail.gmail.com> (raw)
In-Reply-To: <[email protected]>
References: <[email protected]>

Yes.
Also, are you sure you mean deadlock ? It sounded like this is just a
simple lock conflict and not a deadlock.
The first transaction could be blocked on something else (even tho it's not
ally short and quick ).
Lock requests  are in a queue


On Mon, 9 Dec 2024, 21:16 Eric Schwarzenbach, <[email protected]>
wrote:

> Hi,
>
> Could one transaction (one that should be relatively simple and short)
> cause another complex, long running transaction (involving INSERTS, on a
> table the first transaction may be reading from) to take many orders of
> magnitude longer than it would normally? (short of competing for system
> resources, like CPU time etc, of course)
>
> I don't believe my scenario involved a deadlock but I expect my short
> transaction was probably blocked by my long one. Does it make any sense
> that this could very significantly affect the performance of the
> non-blocked transaction?
>
> Thanks,
>
> Eric
>
>
>
>
>

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