........................................................................................... 8 Performance .............................................................................................. executing the view's trigger code and again executing the table's trigger code. This situation caused performance problems or exceptions, particularly if blobs were involved. Now, if you define triggers for a if the backup subsequently turns out to be unrestorable. Performance The following changes should be noted as possible sources of performance loss: Existence Predicates NOT IN and ALL May Be Slow Firebird

allocated to store (cache) database pages in memory to help improve the efficiency of the database performance. It is far quicker to read data from memory that it is to have to physically read the data from  Please don’t consider page buffers value as an ultimate parameter to improve Firebird’s performance, and don’t set it too high without clear understanding what are you doing. The setting applies page becoming completely empty, then it can be used for any purpose within the database. • The performance of the database may be affected while the sweep is in progress.  Theoretically, it is possible

in triggers for adding and updating data. It may reduce the performance of inserting/updating records, but it will increase the performance of data selection. Defining an ARRAY Column • If the column parameters were unchanged. Enhanced Performance since stored procedures are executed on a server instead of at the client, network traffic is reduced, which improves performance. 7.2.2. Types of Stored Procedures dependency checks to discover whether tables or columns have been dropped 3. Even though the performance in loops has been significantly improved in Firebird 2.5, execution is still considerably slower

sup- port. Better performance in case of a small number of multiple connections that do not influence each other. No SMP support. On multi-processor Windows ma- chines, performance can even drop dramatically overwhelming), just pick one or the other. In most circumstances, chances are that you won't notice a performance differ- ence. Besides, you can always switch to the other architecture later; your applications configuration is forced writes off (or disabled). It is sometimes resorted to in order to improve performance during large batch operations. The big warning here is: do not disable forced writes on a Windows

multi-processor) sup- port. Better performance in case of a small number of connections that do not influ- ence each other. No SMP support. On multi-processor Win- dows machines, performance can even drop dramatically events with a firewall or tunnel). In most circumstances, chances are that you won't notice a performance difference. Note that you can always switch to the other architecture later; your applications configuration is forced writes off (or disabled). It is sometimes resorted to in order to improve performance during large batch operations. Disabling forced writes on Windows The big warning here is: do

caches) open after the last connection to that database was closed. This can help to improve performance at low cost, when the database is opened and closed frequently, by keeping resources “warm” for in triggers for adding and updating data. It may reduce the performance of inserting/updating records, but it will increase the performance of data selection. Defining an Array Column • If the column parameters were unchanged. Enhanced Performance since stored procedures are executed on a server instead of at the client, network traffic is reduced, which improves performance. 7.2.2. Types of Stored Procedures

response to a query asking if there is a way to reduce the memory cache without giving up too much performance? This was itself in respect of a system that was taking a long time to wake up from hibernation physical discs but three still remain in cache, as yet, unwritten. The results shown above show the performance of the cache over the life of the database so far. We can narrow this down to our current attachments

antwortete auf die Frage, ob es einen Weg gibt, den Speicher-Cache zu reduzieren, ohne zuviel Performance aufzugeben. Dieses Posting bezog sich auf ein System, dass sehr lange benötigte, um aus dem Schlafmodus während 3 Seiten immer noch im Cache verbleiben, noch ungeschrieben. Das obige Beispiel zeigt die Performance des Caches während der Datenbanklaufzeit. Wir können dies auf unser aktuelles Attachment herunterbrechen

Datenbankdatei benötigt. Multiprozessor SMP (Symmetrical Multi-Processor) Unterstützung. Bessere Performance im Fall von einer kleineren Anzahl an Verbin- dungen, die sich gegenseitig nicht beein- flussen flussen. Keine SMP Unterstützung. Auf Multi- prozessormaschinen unter Windows kann sich die Performance sogar erheblich verschlechtern, weil das Betriebssystem den Serverprozess zwischen den CPUs umschaltet

SET SQL DIALECT -- set sql dialect to SET STATs -- toggle display of performance statistics SET TIME -- toggle display of timestamp with DATE values SET TERM SET SQL DIALECT -- set sql dialect to SET STATs -- toggle display of performance statistics SET TIME -- toggle display of timestamp with DATE values SET TERM