Pallav Kalva <pkalva@deg.cc> writes:
> I am sorry for the confusion, what i meant was the oldest entry on the
> log file was on last monday and most recent was this morning and the
> file didnt rotate yet.
Looking at the code, it will have decided to append not truncate because
%U hadn't changed from the preceding value:
* Decide whether to overwrite or append. We can overwrite if (a)
* Log_truncate_on_rotation is set, (b) the rotation was triggered by
* elapsed time and not something else, and (c) the computed file name
* is different from what we were previously logging into.
There's also a funny involved in the first rotation after startup,
although in your situation case (c) would've prevented overwrite anyway:
* Note: during the first rotation after forking off from the postmaster,
* last_file_name will be NULL. (We don't bother to set it in the
* postmaster because it ain't gonna work in the EXEC_BACKEND case.)
* So we will always append in that situation, even though truncating
* would usually be safe.
So my advice remains "wait till this Thursday before complaining".
regards, tom lane