On Mittwoch, 19. März 2008 Campbell, Lance wrote: > Would there be benefits in running PostgreSQL in a 32 bit mode on a > 64 bit version of XP? My thought is that the OS could access more > of the memory for the caching of the files. I come to this > understanding because on my production Linux box, I don't allocate > more than a 2 Gig to PostgreSQL. I leave the rest of the memory > available for the caching of disk files. So even though PostgreSQL > would be running in a 32 bit mode it seems like it would still run > better on a 64 bit XP box compared to a 32 bit version. This of > course assumes that one does have a sizeable database. If memory is not the problem (db < 2GB), then it depends on your hardware if your specific application is faster with 32 or 64 bit. Handling big data structures that are 64bit aligned on a 64 bit optimized hardware can be slower on a 32bit postgresql, while a database with "small int" only values might actually be faster on a 32bit db, because of more efficient caching. Example: We run dbmail (http://www.dbmail.org), a postgresql based e-mail server, with a several GB DB, storing e-mails, which is quite big data in DB terms. 64bit is more efficient here. mfg zmi -- // Michael Monnerie, Ing.BSc ----- http://it-management.at // Tel: 0676/846 914 666 .network.your.ideas. // PGP Key: "curl -s http://zmi.at/zmi.asc | gpg --import" // Fingerprint: AC19 F9D5 36ED CD8A EF38 500E CE14 91F7 1C12 09B4 // Keyserver: www.keyserver.net Key-ID: 1C1209B4
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