Re: Higher level questions around shared memory stats

On 29.03.22 23:01, Andres Freund wrote:
>> I think what's actually most important here is the error reporting. We need
>> to make it clear, at least via log messages, that something bad has
>> happened.
> The message currently (on HEAD, but similarly on the path) is:
>                 ereport(pgStatRunningInCollector ? LOG : WARNING,
>                         (errmsg("corrupted statistics file \"%s\"",
>                                 statfile)));

Corrupted how?  How does it know?  Is there a checksum, was the file the 
wrong length, what happened?  I think this could use more detail.