On 23-1-2011 18:50, Tom Hughes wrote:
Do we actually know that 9.0 is ok though? I was basing my comments on a
single report of some preliminary tests at SOTM last year.
I've been using it on 2 servers for months. While I haven't done proper
testing, it does feel faster than 8.4 which had been on those servers
for at least over a year before.
It seems to depend mostly on your autovacuum settings, since
fastupdate=on will apply the updated index only during a vacuum, or when
the list has grown larger than work_mem.
YMMV
http://www.postgresql.org/docs/8.4/static/gin-implementation.html
http://www.postgresql.org/docs/9.0/static/gin-implementation.html
9.0 did add the following:
"Use red-black binary trees for GIN index creation (Teodor Sigaev)
Red-black trees are self-balancing. This avoids slowdowns in cases where
the input is in nonrandom order."
http://www.postgresql.org/docs/9.0/interactive/release-9-0.html
--
Lennard
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