Machine details
CPU	4 core
OS	suse linux 10.3
RAM	24GB
Base records	1000000	record size	1800
update	3	shared buffers	4GB
auto vacuum	off	wal_buffers	16MB
ckpt seg	256	ckpt interval	15min
server_encoding	SQL_ASCII	client_encoding	UTF8
lc_collate	C	lc_ctype	C
sync commit	off	Fill factor	100
Update rec length	250
CONFIGURATION
Clients	1		2		4		8
WAL Memcmp with org LZ for UPDATE + XLOG scale code
	TPS	Xlog Diff (GB)	TPS	Xlog Diff (GB)	TPS	Xlog Diff (GB)	TPS	Xlog Diff (GB)
Run1	802	2.51	1584	3.36	3178	6.20	5164	9.51
Run2	800	2.50	1631	3.40	3198	6.26	5211	9.66
Run3	821	2.53	1593	3.37	3130	6.20	5045	9.33
Avg	807.6666667	2.51	1602.666667	3.38	3168.667	6.22	5140	9.50
XLOG Scale code
	TPS	Xlog Diff (GB)	TPS	Xlog Diff (GB)	TPS	Xlog Diff (GB)	TPS	Xlog Diff (GB)
Run1	792	4.28	1437	7.61	2228	11.65	2624	13.89
Run2	803	4.36	1445	7.64	2271	11.83	2648	14.03
Run3	812	4.42	1477	7.77	2260	11.78	2657	14.06
Avg	802.3333333	4.35	1453	7.67	2253	11.75	2643	13.99
DIFF
	0.66%	-42.27%	10.30%	-55.99%	40.64%	-47.08%	94.48%	-32.11%
CONFIGURATION
Clients	1		2		4		8
WAL memcmp with mod LZ for UPDATE + XLOG scale code
	TPS	Xlog Diff (GB)	TPS	Xlog Diff (GB)	TPS	Xlog Diff (GB)	TPS	Xlog Diff (GB)
Run1	823	2.50	1624	3.32	3204	6.01	5298	9.31
Run2	783	2.44	1630	3.32	3206	5.97	5335	9.04
Run3	782	2.43	1608	3.31	3239	6.04	5178	9.12
Avg	796	2.46	1620.666667	3.32	3216.333	6.01	5270.333	9.16
XLOG Scale code
	TPS	Xlog Diff (GB)	TPS	Xlog Diff (GB)	TPS	Xlog Diff (GB)	TPS	Xlog Diff (GB)
Run1	792	4.28	1437	7.61	2228	11.65	2624	13.89
Run2	803	4.36	1445	7.64	2271	11.83	2648	14.03
Run3	812	4.42	1477	7.77	2260	11.78	2657	14.06
Avg	802.3333333	4.35	1453	7.67	2253	11.75	2643	13.99
DIFF
	-0.79%	-43.57%	11.54%	-56.78%	42.76%	-48.89%	99.41%	-34.56%