Date: Wed, 28 Nov 2012 10:35:49 +0200 From: =?UTF-8?B?TWV0aW4gRMO2xZ9sw7w=?= <metindoslu@gmail.com> To: freebsd-fs@freebsd.org Subject: Performance Difference on UFS and ZFS Message-ID: <CAJOrxZCNeo-v_=LT8x1UniRspzZ5qs_DnnOtnb4DnF-RwGFJFw@mail.gmail.com>
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Hi - I installed PostgreSQL 9.1.6 on FreeBSD 9.0-RELEASE, and compared ZFS to UFS. I also made sure all data easily fit into memory, ran some sequential scan queries on the database. Query run times on UFS were 100-200% slower than those of ZFS. This was intriguing as all data came from memory. What could be causing such a large performance difference? Thanks, Metin D=C3=B6=C5=9Fl=C3=BC
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