17.1.3 Relationships among threads used by the adbimport command

The adbimport command uses processing real threads in the following processing:

1. Importing table data, creating and maintaining range indexes, and creating temporary work files

   One or more processing real threads are used.

2. Sorting records of B-tree and text indexes

   One or more processing real threads are used.

3. Creating and maintaining B-tree and text indexes

   One or more processing real threads are used.

4. Outputting the progress of command processing

   One processing real thread is used.

Steps 1 to 3 are performed in sequence. Step 4 is always performed while steps 1 to 3 are in progress.

The following figure shows the processing of the adbimport command using processing real threads. The preceding numbers correspond to the numbers in the figure.

Figure 17‒5: Processing of the adbimport command using processing real threads

The number of processing real threads used by the adbimport command for each step is automatically calculated from the number of processing real threads to be used by the adbimport command. For details about the number of processing real threads to be used by the adbimport command, see the description of the import option adb_import_rthd_num in (b) Options related to performance in (1) Specification format in 17.2.2 Format of import options.

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