FSM #57
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FSM #57
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demo:
create table t(a text) with (fillfactor = 100, toast.vacuum_truncate=true);
create table t2(like t including parameters);
\d+ t2
Table "public.t2"
Column | Type | Collation | Nullable | Default | Storage | Compression | Stats target | Description
--------+------+-----------+----------+---------+----------+-------------+--------------+-------------
a | text | | | | extended | | |
Access method: heap
Options: fillfactor=100, toast.vacuum_truncate=true
discussion: https://postgr.es/m/CACJufxHr=nKEsS66M7rTHgB+mXdQ948=_eJ1jztAc7PT-eJefA@mail.gmail.com
`fsm_truncate_avail` changes FSM page when relation is truncated, resetting all FSM-tree nodes to zero. However, there is a case when all nodes were already zero, so no actaul modiifcation made. This commit emits WAL-logging FSM FPI for that case.
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