Ühel kenal päeval, L, 2006-08-12 kell 10:59, kirjutas Tom Lane: > Hannu Krosing <[EMAIL PROTECTED]> writes: > > Ühel kenal päeval, K, 2006-08-09 kell 10:57, kirjutas Tom Lane: > >> Insert points to the next byte to be written within the internal WAL > >> buffers. The byte(s) preceding it haven't necessarily gotten out of > >> those buffers yet. Write points to the end of what we've actually > >> written to the kernel, > > > I assume that it also points to the byte after what is written to > > kernel, or is it tha last byte written ? > > Right, it's really first-unwritten-byte for all three pointers. > The two newly added functions to convert WAL locations to filenames > use XLByteToPrevSeg(), so they should do the right thing here > (see comments in src/include/access/xlog_internal.h).
How do they behave exactly at the file boundary ? That is will it point 1 byte past end of old file, or byte 0 of the new one ? > regards, tom lane -- ---------------- Hannu Krosing Database Architect Skype Technologies OÜ Akadeemia tee 21 F, Tallinn, 12618, Estonia Skype me: callto:hkrosing Get Skype for free: http://www.skype.com ---------------------------(end of broadcast)--------------------------- TIP 4: Have you searched our list archives? http://archives.postgresql.org
