In This Chapter

This chapter provides the instructions that you need to manage effectively the disk spaces and data that the database server controls. It assumes you are familiar with the terms and concepts contained in Data Storage.

This chapter covers the following topics:

• Initializing disk space
• Allocating disk space
• Setting configuration variables related to disk management
• Backing up after you change the physical schema
• Managing chunks and storage spaces
  • Creating and dropping dbspaces and dbslices
  • Allocating, adding, and dropping chunks from dbspaces
  • Altering dbslices
  • Optimizing blobpage size
• Skipping inaccessible fragments
• Monitoring disk space
• Monitoring simple-large-object data

Your IBM Informix: Performance Guide also contains information about managing disk space. In particular, it describes how to eliminate interleaved extents and how to reclaim space in an empty extent.