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Thread: Profiling a function call

Profiling a function call

From
Tiffany Thang
Date:
Hi,
I have a function that has been executing for a long time and not returning any results. Wait event=NULL so it seems like it is still executing and not waiting on any specific resources. Is there a way to profile the function call to get an idea of what it is currently executing within the function? All I could find in pg_stat_activity is the function is running. I want to know what query/transaction within the function is running. Is there a way to obtain that information?

PostgreSQL 15.2 on Linux.

Thanks.

Tiff

Re: Profiling a function call

From
Jan Wieck
Date:
On 5/20/23 00:36, Tiffany Thang wrote:
> Hi,
> I have a function that has been executing for a long time and not 
> returning any results. Wait event=NULL so it seems like it is still 
> executing and not waiting on any specific resources. Is there a way to 
> profile the function call to get an idea of what it is currently 
> executing within the function? All I could find in pg_stat_activity is 
> the function is running. I want to know what query/transaction within 
> the function is running. Is there a way to obtain that information?

This may give you some idea. I haven't touched or used it in many years, 
but it might get you started:

https://github.com/wieck/plbacktrace


Best Regards, Jan

> 
> PostgreSQL 15.2 on Linux.
> 
> Thanks.
> 
> Tiff

Re: Profiling a function call

From
Pavel Stehule
Date:


ne 21. 5. 2023 v 13:30 odesílatel Jan Wieck <jan@wi3ck.info> napsal:
On 5/20/23 00:36, Tiffany Thang wrote:
> Hi,
> I have a function that has been executing for a long time and not
> returning any results. Wait event=NULL so it seems like it is still
> executing and not waiting on any specific resources. Is there a way to
> profile the function call to get an idea of what it is currently
> executing within the function? All I could find in pg_stat_activity is
> the function is running. I want to know what query/transaction within
> the function is running. Is there a way to obtain that information?

This may give you some idea. I haven't touched or used it in many years,
but it might get you started:

https://github.com/wieck/plbacktrace

plpgsql_check has integrated tracer


Regards

Pavel
 



Best Regards, Jan

>
> PostgreSQL 15.2 on Linux.
>
> Thanks.
>
> Tiff



Re: Profiling a function call

From
Tiffany Thang
Date:
Thanks, Jan and Pavel. I will check out the tracer.

Tiff

On Sun, May 21, 2023 at 7:43 AM Pavel Stehule <pavel.stehule@gmail.com> wrote:


ne 21. 5. 2023 v 13:30 odesílatel Jan Wieck <jan@wi3ck.info> napsal:
On 5/20/23 00:36, Tiffany Thang wrote:
> Hi,
> I have a function that has been executing for a long time and not
> returning any results. Wait event=NULL so it seems like it is still
> executing and not waiting on any specific resources. Is there a way to
> profile the function call to get an idea of what it is currently
> executing within the function? All I could find in pg_stat_activity is
> the function is running. I want to know what query/transaction within
> the function is running. Is there a way to obtain that information?

This may give you some idea. I haven't touched or used it in many years,
but it might get you started:

https://github.com/wieck/plbacktrace

plpgsql_check has integrated tracer


Regards

Pavel
 



Best Regards, Jan

>
> PostgreSQL 15.2 on Linux.
>
> Thanks.
>
> Tiff