Re: Outage caused by query in IPC:MessageQueueReceive wait????

Yes, it appeared to be in a transaction. The pg_stat_activity.xact_start was before the query_start. Unfortunately, I don’t have the other queries. (I snapshot pg_stat_activity every minute, so it missed any prior queries to the blocker).

Thanks,

Chris Hoover
Senior DBA
AWeber.com
Cell: (803) 528-2269
Email: chrish(at)aweber(dot)com

> On Jun 14, 2024, at 2:16 PM, Ozgur Kulu <kuluozgur(at)gmail(dot)com> wrote:
>
> Hi chris,
>
> Is this query in transaction block ?
>
> 14 Haz 2024 Cum 20:03 tarihinde Chris Hoover <chrish(at)aweber(dot)com <mailto:chrish(at)aweber(dot)com>> şunu yazdı:
>> Forgot to mention, this is on PG 16.1
>>
>> Thanks,
>>
>>
>> Chris Hoover
>> Senior DBA
>> AWeber.com
>> Cell: (803) 528-2269
>> Email: chrish(at)aweber(dot)com <mailto:chrish(at)aweber(dot)com>
>>
>>
>>
>>> On Jun 14, 2024, at 12:52 PM, Chris Hoover <chrish(at)aweber(dot)com <mailto:chrish(at)aweber(dot)com>> wrote:
>>>
>>> All,
>>>
>>> We had an outage today that appears to have been caused by a query in "IPC:MessageQueueReceive” wait state blocking another query from completing a truncate.
>>>
>>> Is there anyway to figure out what exactly it was waiting on other than an IPC message? I’m trying to get to the true root cause of our outage.
>>>
>>> Thanks,
>>>
>>>
>>> Chris Hoover
>>> Senior DBA
>>> AWeber.com
>>> Cell: (803) 528-2269
>>> Email: chrish(at)aweber(dot)com <mailto:chrish(at)aweber(dot)com>
>>>
>>>
>>>
>>