DeprecatedParameter38

EnableSynchronousTaskIO

_USE_IOPROCS_ONLY

7.8

-

YES: I/O operations are executed only by special I/O threads

NO: The kernel decides whether a task executes an I/O operation itself or delegate the I/O operation to a special I/O thread

-

MaxVolumes

MAXVOLUMES

7.8

-

Maximum number of data and log volumes, including mirrored volumes

-

MiniDumpType

MINI_DUMP

7.8

-

Defines whether the system writes the memory dumps knlmini.dmp and srvmini.dmp (for postmortem debugging) and how much information these dumps contain

-

_BACKUP_HISTFILE

7.7

7.7

Name of the history file for data and log backups

-

_BACKUP_MED_DEF

7.7

7.7

Name of the file containing the definitions of the backup templates

DeprecatedParameter22

_UNICODE

7.7

-

Defines whether the database system uses Unicode as the character set for the names of database objects in the database catalog

DeprecatedParameter01

BACKUP_BLOCK_CNT

7.7

-

Block size used by the database system when writing backups to data carriers

Only useful for tapes that have an optimal block size

-

ClusterCompressionThreshold

7.7.06.04

7.7.04.27

7.8.00.04

-

Minimum number of blocks in a cluster that is eligible for compression that needs to be reached before the database system starts compressing the cluster (in 1/1000 of the total block count)

DeprecatedParameter13

EXPAND_COM_TRACE

7.7

-

Specifies whether memory space is reserved when COM trace files are created

DeprecatedParameter29

USE_OPEN_DIRECT

7.7

-

Replaced by UseFilesystemCacheForVolume, see Support Database Parameters

YES: the database system uses the O_DIRECT flag when opening volumes (if this flag is supported by the file system). You use this flat to configure that the operating system does not use a separate cache for I/O operations. Note that this flag is ignored for Linux kernel < 2.4.18.Changes only apply after restart