On Thu, 18 Sep 2003 15:36:50 -0700, Jenny Zhang [EMAIL PROTECTED]
wrote:
We thought the large effective_cache_size should lead us to better
plans. But we found the opposite.
The common structure of your query plans is:
Sort
Sort Key: sum((partsupp.ps_supplycost * partsupp.ps_availqty))
Our hardware/software configuration:
kernel: 2.5.74
distro: RH7.2
pgsql: 7.3.3
CPUS: 8
MHz:700.217
model: Pentium III (Cascades)
memory: 829 kB
shmmax: 3705032704
We did several sets of runs(repeating runs with the same database
parameters) and have the following observation:
1. With
