Machine details							Base records	1000000	fill factor	100
CPU	8 core						update	3	shared buffers	2GB
OS	suse linux 10.3						record size	1800	update size	250
RAM	24GB						threads	8	clients	16
							auto vacuum	off	wal page size	1K
							ckpt seg	256	ckpt interval	15min
							sync commit	off
Random string
fill factor	100
pgbench	Original code		Wal Modified code		Difference(%)		LZ code		Difference(%)
	TPS	Total	TPS	Total	TPS	Total	TPS	Total	TPS	Total
Run1	905	545253	1395	838421	54.14365	53.76733	1446	870938	59.77900552	59.73099
Run2	995	598687	1455	874202	46.23116	46.01987	1441	865342	44.8241206	44.53997
Run3	1003	602998	1386	834458	38.18544	38.38487	1485	892966	48.0558325	48.08772
Avg	967.6667	582312.7	1412	849027	46.18675	46.05736	1457.333333	876415.3	50.88631954	50.78623
fill factor	80
pgbench	Original code		Wal Modified code		Difference(%)		LZ code		Difference(%)
	TPS	Total	TPS	Total	TPS	Total	TPS	Total	TPS	Total
Run1	1302	781997	2234	1342166	71.58218	71.63314	2319	1392679	78.11059908	78.09263
Run2	1434	861746	2829	1699465	97.28033	97.21182	3134	1882053	118.5495119	118.4
Run3	1497	899952	2280	1373820	52.30461	52.65481	2003	1209520	33.8009352	34.39828
Avg	1411	847898.3	2447.667	1471817	73.72238	73.83326	2485.333333	1494751	76.82034871	76.96363