On Thu, Jul 20, 2017 at 10:58 AM, DEV_OPS <dev...@ww-it.cn> wrote: > I think you may reference to function: pg_xlogfile_name in > src/backend/access/transam/xlogfuncs.c, it use XLogFileName defined in > src/include/access/xlog_internal.h > > #define XLogFileName(fname, tli, logSegNo) \ > snprintf(fname, MAXFNAMELEN, "%08X%08X%08X", tli, \ > (uint32) ((logSegNo) / XLogSegmentsPerXLogId), \ > (uint32) ((logSegNo) % XLogSegmentsPerXLogId)) > > > hope it's helpful for you
The first 8 characters are the timeline number in hexadecimal format. The next 8 characters indicate a segment number, which gets incremented every 256 segments in hexa format. The last 8 characters indicate the current segment number in hexa format. -- Michael -- Sent via pgsql-hackers mailing list (pgsql-hackers@postgresql.org) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-hackers
