PostgreSQL 9.3 performance

Results
PostgreSQL 9.3 Pgbench Transactions Per Second, 2x Xeon X5650 / 24GB (24 threads), Unix socket
Clients 1 3 6 9 12 15 18 24 32 48 64 80
DragonFly-3.0
5024 16077 33735 26530 31304 31825 30002 31132 23898 9769 5786 4193
DragonFly 3.1 2012-09-23 9665 28052 60178 84167 104149 119508 133629 161237 144191 130426 125031 120230
FreeBSD 9.1-RC1 7322 26408 50749 69273 80759 89724 95678 96475 90612 69029 54197 43334
Scientific Linux 6.2
9518 24822 47921 65354 88592 107255 128261 167080 149119 143467 138124 135827
DragonFly 3.1 idprio=15
133501 161489 151343 157698 152214 151031
tps
180000
160000
140000
120000
100000
80000
60000
40000
20000
PostgreSQL 9.3 performance
0
1 3 6 9 12 15 18 24 32 48 64 80
clients
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DragonFly-3.0
DragonFly 3.1 2012-09-23
FreeBSD 9.1-RC1
Scientific Linux 6.2
DragonFly 3.1 idprio=15

Detailled TPS results excluding connections establishing
All tests were done with Postgres 9.3-devel and the new mmap() shared memory facility
Clients (and threads)
Scientific Linux 6.2 mmap
Scientific Linux 6.2 mmap
Scientific Linux 6.2 mmap
Raw data
1 3 6 9 12 15 18 24 32 48 64 80
9,883 23,825 49,273 65,392 88,944 106,995 128,606 167,035 149,162 143,405 138,247 135,839
9,422 26,043 47,051 65,398 89,032 107,528 127,081 167,194 149,207 143,690 137,909 136,024
9,248 24,597 47,438 65,273 87,800 107,241 129,094 167,011 148,989 143,305 138,218 135,617
FreeBSD 9.1 2012-09-21 7,161 26,390 50,810 69,254 80,810 89,755 96,732 96,610 90,695 69,035 54,250 43,150
FreeBSD 9.1 2012-09-21 7,248 26,533 50,798 69,240 80,767 89,700 95,134 96,359 90,535 69,145 54,136 43,402
FreeBSD 9.1 2012-09-21 7,558 26,301 50,639 69,324 80,699 89,718 95,168 96,455 90,607 68,906 54,206 43,449
DragonFly 3.0 mmap
DragonFly 3.0 mmap
DragonFly 3.0 mmap
DragonFly 3.1 2012-09-23
DragonFly 3.1 2012-09-23
DragonFly 3.1 2012-09-23
DragonFly 3.1 2012-09-25
DragonFly 3.1 2012-09-25
DragonFly 3.1 2012-09-25
DragonFly 3.1 2012-09-25 #2
DragonFly 3.1 2012-09-26
Same, pgbench idprio = 15
5,659 17,199 35,552 31,191 30,928 32,297 28,600 29,556 26,920 10,299 5,935 4,150
4,202 14,198 33,562 29,122 31,558 31,368 30,392 30,383 22,474 9,940 5,702 4,271
5,210 16,833 32,091 19,276 31,426 31,809 31,014 33,456 22,301 9,070 5,721 4,157
10,386 26,537 59,601 85,788 104,062 118,750 134,171 162,812 144,326 130,386 125,034 120,169
10,362 26,583 59,914 82,980 103,450 120,084 132,801 158,181 144,437 129,925 124,986 120,172
8,248 31,036 61,018 83,734 104,936 119,691 133,916 162,718 143,811 130,967 125,071 120,348
10,456 30,763 60,339 87,692 105,410 117,581 131,430 153,959 128,117 140,516 121,021 112,504
10,633 31,062 60,246 87,023 103,099 119,303 132,225 159,387 127,870 142,523 120,762 112,911
10,685 30,730 59,489 86,796 103,451 119,281 131,603 153,200 127,295 142,024 120,616 112,803
10,433 30,611 61,529 87,914 106,907 119,516 133,996 159,796 142,343 129,759 121,279 114,355
10,313 30,158 60,542 85,403 105,290 118,596 132,871 160,590 143,031 131,994 125,205 119,973
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133,501 161,489 151,343 157,698 152,214 151,031

Hardware:
- 2x Xeon X5650 (24 threads total)
- 24 GB RAM
Setup
Software
PostgreSQL 9.3-devel, just after the patch changing setup of the shared memory segment to mmap
Scientific Linux 6.2, FreeBSD-9.1-RC1 or DragonFly 3.1
Goal:
Test scalability with pgbench, show improvements, compare with other operating systems
postgresql.conf : Initialize database cluster :
max_connections = 100
update_process_title = off
/usr/local/postgres-9.3.mmap/bin/initdb -D /usr/local/pgdata.93
autovacuum = off Run Postgres :
shared_buffers = 6GB
effective_cache_size = 12GB
/usr/local/postgres-9.3.mmap/bin/postgres -D /usr/local/pgdata.93
Create test database
psql template1
create database bench;
pgbench -i -s 800 bench Scaling factor 800 => ~= 11GB database
Running tests :
pgbench -j 6 – c 6 -T 1800 -S bench # Dummy run to warm up caches for 30 mn
#!/bin/sh
for clients in 1 3 6 9 12 15 18 24 32 48 64 80
do
THREADS=${clients}
./pgbench -j ${THREADS} -c ${clients} -T 300 -S bench > result_${clients}.txt
done
Repeat three times and average the individual results
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