Database Advanced page

dLabel database grow in size as additional records are added. The Database Advanced page allows certain parameters which control the memory usage of the database to be specified. In most case the default values will be found satisfactory and should only be modified by technical support personnel.

The maximum database file size sets a limit on the size to which a dLabel database can grow. dLabel uses virtual memory for large databases and in a typical Windows NT system the virtual memory disk file will be 20 - 40 Mbytes. dLabel’s default maximum file size is 10 Mbytes so that it does not attempt to use more than half of the available virtual memory.

If you need to use database files larger than this then you should adjust the virtual memory settings for your computer in addition to changing this dLabel parameter.

As dLabel database grow in size dLabel allocates memory in fixed size increments, and each time it does this a noticeable delay can occur while memory is rearranged. The default increment size is 8 Kbytes.

If this value is made too small then there will be frequent delays as data is being entered. On the other hand if the value is too large then you will be taking up physical memory without good reason and relying on slower virtual memory for other processes.

dLabel also maintains a buffer memory to allow records to be edited and inserted into to database. The size of the buffer memory must be sufficient to hold the largest record in the database or the program will not be able to move or edit the record. The default buffer size is 10 Kbytes. Using a value which is too large will again waste physical memory.

Note that while records may containing filenames for pictures they do not actually contain pictures - so records are unlikely to require parameters in excess of the default values.

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