| From: | Andres Freund <andres(at)anarazel(dot)de> |
|---|---|
| To: | Dong Wook Lee <sh95119(at)gmail(dot)com> |
| Cc: | Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>, pgsql-hackers(at)postgresql(dot)org |
| Subject: | Re: pgstattuple: add test for coverage |
| Date: | 2022-10-02 07:14:30 |
| Message-ID: | 20221002071430.xfurt6znk2ruyxwy@awork3.anarazel.de |
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| Lists: | pgsql-hackers |
Hi,
On 2022-08-03 11:19:59 +0900, Dong Wook Lee wrote:
> Is there no problem with selecting all the columns during SELECT statements?
> I thought there might be a problem where the test results could change easily.
Which indeed is the case, e.g. on 32bit systems it fails:
https://cirrus-ci.com/task/4619535222308864?logs=test_world_32#L253
table_len | tuple_count | tuple_len | tuple_percent | dead_tuple_count | dead_tuple_len | dead_tuple_percent | free_space | free_percent
-----------+-------------+-----------+---------------+------------------+----------------+--------------------+------------+--------------
- 1171456 | 5000 | 560000 | 47.8 | 5000 | 560000 | 47.8 | 7452 | 0.64
+ 1138688 | 5000 | 540000 | 47.42 | 5000 | 540000 | 47.42 | 14796 | 1.3
(1 row)
...
You definitely can't rely on such details not to change across platforms.
Greetings,
Andres Freund
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