Re: statement_timeout has no effect if sync standby is unavailable

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On Wed, 2023-11-01 at 15:44 +0530, Nikhil Shetty wrote:
> We have also seen this scenario when we froze the data mount point and run a DML
> 
> Freeze mountpoint 
> date;fsfreeze --freeze /postgres
> The statement is just stuck even thought statement_timeout is set
> 
> datid        | 14175
> datname      | postgres
> pid          | 5789
> leader_pid   | 
> usesysid     | 10
> usename      | postgres
> application_name | hang_monitor
> client_addr  | 127.0.0.1
> client_hostname | 
> client_port  | 37440
> backend_start| 2023-11-01 10:05:51.090023+00
> xact_start   | 2023-11-01 10:05:51.167816+00
> query_start  | 2023-11-01 10:05:51.167816+00
> state_change | 2023-11-01 10:05:51.167817+00
> wait_event_type | IO
> wait_event   | WALWrite
> state        | active
> backend_xid  | 43242183
> backend_xmin | 
> query        | update HEARTBEAT set last_updated_time = timezone('UTC', now()) where ID = 1;
> backend_type | client backend

Check with "ps": perhaps the backend process is in uninterruptible sleep, waiting
for I/O.

Yours,
Laurenz Albe






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