Bogus temp file reporting?

Hello,

Is there a known issue with temp file reporting? I have a production db that is reporting 231TB of temp space usage, which can’t be true. temp_blks_written in pg_stat_statements sort of confirms this, as the reported queries show just a few MB of temp space usage. I suspect a reboot will clear this (to do) and wanted to check with you to see if someone else has had similar experiences.

Regards,
Kiriakos Georgiou

select version();
version
-----------------------------------------------------------------------------------------------------------------------------------
PostgreSQL 14.8 (Ubuntu 14.8-1.pgdg20.04+1) on x86_64-pc-linux-gnu, compiled by gcc (Ubuntu 9.4.0-1ubuntu1~20.04.1) 9.4.0, 64-bit
(1 row)


select
datname,
temp_files as "# of temp files",
pg_size_pretty(temp_bytes) as "size of temp files"
from
pg_stat_database;

datname | # of temp files | size of temp files
---------------+-----------------+--------------------
| 0 | 0 bytes
postgres | 0 | 0 bytes
testdb | 269647 | 231 TB
template0 | 0 | 0 bytes
template1 | 0 | 0 bytes