On Thu, 30 Oct 2003, alexandre :: aldeia digital wrote: > Hi, > > Old: Post 7.3.2, P4 1.8, 1 MB RAM, 2 x IDE SW RAID 1, RedHat 8 > New: Post 7.3.4, Xeon 2.4, 1 MB RAM, 2 x SCSI 15k SW RAID 1, RedHat 9 > > Both use: Only postgresql on server. Buffers = 8192, effective cache = 100000 > > In old plataform the free and vmstat reports no use of swap. > In new, the swap is in constant use (40-100 MB), with a low but constant > swap out and swap in. The cache memory ~ 830000 and buffers ~ 43000
Do both machines have the same amount of swap, and what kernels are the two running? Also, do the xeons have hyperthreading turned on. I doubt hyperthreading has anything to do with this problem, but I've found that turning off hyperthreading in the BIOS gets me a faster machine under Postgresql so I just thought I'd throw that out there. ---------------------------(end of broadcast)--------------------------- TIP 9: the planner will ignore your desire to choose an index scan if your joining column's datatypes do not match