We have a 127GB Firebird database that was running on Windows Server 2008 x64 with 16GB of RAM and Firebird SuperClassic v2.5.2.26539. The database has a page size of 8192 and buffers of 6144, and ODS version 11.2.
Due to time constraints I could not do a backup+restore on the new server, which is Windows 2012 with 32GB RAM and Firebird SuperClassic v2.5.5.26952. However, most activity on this new server with the old database is much slower than the old server. I'm only seeing about 1.5GB Private Bytes in use, jumping occasionally to 2.5GB with a working set of 1.1GB and Virtual Size of 2.7 (as per Process Explorer). The only changes that I have made to the stock Firebird.conf are as follows: DefaultDbCachePages = 384 FileSystemCacheSize = 50 TempBlockSize = 2048576 TempCacheLimit = 567108864 The database is comprised of many images up to 1.5MB in size, but they are not accessed very often. The actual data size outside of these images is probably 1/3 of the total DB size. There are typically about 20 connections to the database servicing up to 140 users, with a mix of read and write transactions, as well as some reporting. The header statistics look like this: Database header page information: Flags 0 Checksum 12345 Generation 106862144 Page size 8192 ODS version 11.2 Oldest transaction 103869407 Oldest active 103869408 Oldest snapshot 103869408 Next transaction 103870442 Bumped transaction 1 Sequence number 0 Next attachment ID 2991646 Implementation ID 26 Shadow count 0 Page buffers 6144 Next header page 0 Database dialect 3 Creation date Feb 2, 2014 22:06:05 Attributes force write Variable header data: Sweep interval: 0 *END* I'm looking for some guidance as to how changes that should be made to the Firebird configuration file and to the database when I do a backup/restore. For instance, I'm sure that I want to jump to 16KB pages, but what about buffers? There are other services that run on this server, so I cannot use all resources for the database. However, I believe it is provisioned well enough that I can certainly use half of the resources - processor and memory - without affecting the application server and web server that are running on the same box. Thank you for your time, Bob M..