## klaus.mailinglists@xxxxxxxxx (klaus.mailinglists@xxxxxxxxx): > On several servers we see the error message: PANIC: could not flush > dirty data: Cannot allocate memory As far as I can see, that "could not flush dirty data" happens total three times in the code - there are other places where postgresql could PANIC on fsync()-and-stuff-related issues, but they have different messages. Of these three places, there's an sync_file_range(), an posix_fadvise() and an msync(), all in src/backend/storage/file/fd.c. "Cannot allocate memory" would be ENOMEM, which posix_fadvise() does not return (as per it's docs). So this would be sync_file_range(), which could run out of memory (as per the manual) or msync() where ENOMEM actually means "The indicated memory (or part of it) was not mapped". Both cases are somewhat WTF for this setup. What filesystem are you running? Regards, Christoph -- Spare Space
