Hi, hackers. Here is some test I run on a bigger set. Use a word list of 39916800 unique words The table size is 1529MB. Index BuildTime IndexSize ---- ---- ---- btree 874470.339ms 1027MB hash-patch 513026.381 ms 1024MB
I use pgbench to test the time of a custom query script. There are 2000 statements in the script. It looks like this: select * from dict where word='123456789a0' ... The time of the two index is btree: 1/0.174700=5.00250125 hash-patch: 1/0.199900=5.724098 ---------------btree------------------ $ pgbench -n -f /tmp/query.sql dict transaction type: Custom query scaling factor: 1 query mode: simple number of clients: 1 number of transactions per client: 10 number of transactions actually processed: 10/10 tps = 0.174694 (including connections establishing) tps = 0.174700 (excluding connections establishing) ---------------hash patch------------- $ pgbench -n -f /tmp/query.sql dict transaction type: Custom query scaling factor: 1 query mode: simple number of clients: 1 number of transactions per client: 10 number of transactions actually processed: 10/10 tps = 0.199892 (including connections establishing) tps = 0.199900 (excluding connections establishing) -- Best Regards, Xiao Meng DKERC, Harbin Institute of Technology, China Gtalk: [EMAIL PROTECTED] MSN: [EMAIL PROTECTED] http://xiaomeng.yo2.cn
