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Oracle in a Nutshell
book

Oracle in a Nutshell

by Rick Greenwald, David C. Kreines
December 2002
Intermediate to advanced content levelIntermediate to advanced
928 pages
85h 29m
English
O'Reilly Media, Inc.
Content preview from Oracle in a Nutshell

Name

GC_ROLLBACK_LOCKS

Synopsis

Value: 1 - unlimited

Default: 20

Specifies, for each rollback segment, the number of distributed locks available for simultaneously modified rollback segment blocks for Parallel Server. The default is adequate for most applications. Each instance must have identical values. Obsolete with Oracle9i.

Syntax

GC_ROLLBACK_LOCKS = 'rs_list = lock_count[!blocks][R][EACH][:...]'

Keywords

rs_list

One or more rollback segments listed by their segment numbers, or ranges of segment numbers, with comma separators.

lock_count

Number of PCM locks assigned to rs_list.

! blocks

Number of contiguous blocks covered by one lock. The default is noncontiguous blocks.

R

Indicates that these locks are releasable and are drawn as needed from the pool of releasable locks.

EACH

Indicates that each rollback segment in rs_list is assigned a separate set of lock_count PCM locks.

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Publisher Resources

ISBN: 0596003366Errata Page