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	80
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	812	2.32	1683	3.35	3213	6.01	5357	9.16
Run2	802	2.31	1684	3.35	3221	5.98	5286	9.08
Run3	873	2.43	1687	3.35	3237	6.00	5333	9.15
Avg	829	2.35	1684.666667	3.35	3223.667	6.00	5325.333	9.13
XLOG Scale code
	TPS	Xlog Diff (GB)	TPS	Xlog Diff (GB)	TPS	Xlog Diff (GB)	TPS	Xlog Diff (GB)
Run1	805	4.01	1492	7.46	2191	10.98	2718	13.69
Run2	794	3.95	1409	7.10	2167	10.88	2702	13.58
Run3	836	4.20	1465	7.35	2086	10.51	2692	13.54
Avg	811.6666667	4.05	1455.333333	7.30	2148	10.79	2704	13.60
DIFF
	2.14%	-41.94%	15.76%	-54.13%	50.08%	-44.42%	96.94%	-32.88%
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	802	2.27	1652	3.24	3261	5.78	5449	8.81
Run2	802	2.27	1617	3.21	3268	5.80	5487	8.83
Run3	801	2.27	1704	3.29	3262	5.75	5529	8.93
Avg	801.6666667	2.27	1657.666667	3.25	3263.667	5.78	5488.333	8.86
XLOG Scale code
	TPS	Xlog Diff (GB)	TPS	Xlog Diff (GB)	TPS	Xlog Diff (GB)	TPS	Xlog Diff (GB)
Run1	805	4.01	1492	7.46	2191	10.98	2718	13.69
Run2	794	3.95	1409	7.1	2167	10.88	2702	13.58
Run3	836	4.2	1465	7.35	2086	10.51	2692	13.54
Avg	811.6666667	4.05	1455.333333	7.30	2148	10.79	2704	13.60
DIFF
	-1.23%	-44.00%	13.90%	-55.55%	51.94%	-46.46%	102.97%	-34.89%