Koichi Suzuki <[EMAIL PROTECTED]> writes: > For more information, when checkpoint interval is one hour, the amount > of the archived log size was as follows: > cp: 3.1GB > gzip: 1.5GB > pg_compresslog: 0.3GB
The notion that 90% of the WAL could be backup blocks even at very long checkpoint intervals struck me as excessive, so I went looking for a reason, and I may have found one. There has been a bug in CVS HEAD since Feb 8 causing every btree page split record to include a backup block whether needed or not. If these numbers were taken with recent 8.3 code, please retest with current HEAD. regards, tom lane ---------------------------(end of broadcast)--------------------------- TIP 6: explain analyze is your friend