## IOBUFFERCACHES

### Definition

The system table IOBUFFERCACHES contains information on using the IO buffer cache, which is dimensioned by the database parameter CACHE_SIZE.

### Structure

IOBUFFERCACHES

TOTALSIZE | FIXED(20) | Configured size of the I/O buffer cache according to the database parameter CACHE_SIZE (KB)
DATACACHEUSEDSIZE | FIXED(20) | Pages used by the data cache (KB)
CONVERTERUSEDSIZE | FIXED(20) | Pages used by the converter (KB)
LOGQUEUEUSEDSIZE | FIXED(20) | Pages used by the log queue (KB)
IOMANAGEMENTUSEDSIZE | FIXED(20) | Pages used by I/0 Management (KB)
FILEDIRECTORYUSEDSIZE | FIXED(20) | Pages used by the internal file directory (KB)
RESTARTRECORDUSEDSIZE | FIXED(20) | Restart pages that are used for snapshots (KB)
BLOCKALLOCATORUSEDSIZE | FIXED(20) | Memory used by block allocators (KB)
UNUSEDSIZE | FIXED(20) | Unused pages (KB)
INDEXCREATIONUSEDSIZE | FIXED(20) | Pages used for parallel index creation (KB)

See also:

MEMORYALLOCATORSTATISTICS

Concepts of the Database System, General Database Parameters