On 6/05/2023 12:34 pm, Thomas Munro wrote: > So it does indeed look like something unknown has replaced 32KB of > data with 32KB of zeroes underneath us. Are there more non-empty > files that are all-zeroes? Something like this might find them: > > for F in base/1414389/* > do > if [ -s $F ] && ! xxd -p $F | grep -qEv '^(00)*$' > /dev/null > then > echo $F > fi > done Yes, a total of 309 files are all-zeroes (and 52 files are not). I also checked the other DB that reports the same "unexpected zero page at block 0" error, "test_behavior_638186280406544656" (OID 1414967) - similar story there. I uploaded the lists of zeroed and non-zeroed files and the ls -la output for both as https://objective.realityexists.net/temp/pgstuff3.zip I then searched recursively such all-zeroes files in $PGDATA/base and did not find any outside of those two directories (base/1414389 and base/1414967). None in $PGDATA/global, either.
