Thread

Re: bug reapper: Empty query_id in pg_stat_activity

Srinath Reddy Sadipiralla <srinath2133@gmail.com> — 2025-08-28T12:28:10Z

On Thu, Aug 28, 2025 at 5:55 PM Srinath Reddy Sadipiralla <
srinath2133@gmail.com> wrote:

> sorry for half cooked analysis ,the reason is pgstat_report_query_id()
> zeroes st_query_id before the new one is computed in exec_simple_query(). A
> concurrent reader of pg_stat_activity during that narrow timing gap
> observes 0 (displayed as NULL). The fix I tried is to retain the previous
> query_id (prev_st_query_id) and return it when st_query_id is still 0 but
> query_id computation is enabled, thoughts?
>

I was able to reproduce this on 15.14 and master also , I think we have to
backpatch the fix.

-- 
Thanks,
Srinath Reddy Sadipiralla
EDB: https://www.enterprisedb.com/