Seagate ST43401N/ND Guide d'installation télécharger pdf (Page 84)

If Your Version is 11.5, 11.9.x, or 12.0

Increased Memory

ASE 12.5 uses more memory than previous releases. ASE now allocates more

memory for the dataserver, procedure cache, and named caches. If you do not

increase physical and/or shared memory, the additional needed memory will be

taken from the default data cache, possibly affecting performance. Check the

installation guide at http://manuals.sybase.com:80/onlinebooks/group-

as/asp1250e/@Generic__CollectionView;pt=asp1250e

for minimum memory

requirements. Use

sp_helpcache to check cache sizes before and after upgrade.

Adjust memory if necessary to restore the original value of the default data

cache after upgrade.

See the

System Administration Guide at

http://manuals.sybase.com:80/onlinebooks/group-

as/asg1250e/sag/@Generic__BookView

for information on configuring

memory and data caches; see the

Performance and Tuning Guide at

http://manuals.sybase.com:80/onlinebooks/group-

as/asg1250e/perf/@Generic__BookView

for more information on memory

issues.

New Storage for text and image Data

As part of 12.0 performance enhancements, Sybase replaced the old scan

method used to access

text and image data with an access method based on a

new st-node structure. which wholly or partially (depending on the size of the

text data) resides on the first text page. The st-node contains pointers to each set

of contiguous text pages. For a description of how st-nodes work, see the

TechNote

New Text and Image Data Storage at

http://my.sybase.com/detail?id=1014269

Because of problems arising in early versions of ASE 12.0 and 12.5, it is

recommended that you apply some bug fixes before accessing your text and

image pages. See the following TechNotes for a discussion of text/image issues.

•

Loss of text/image Index Information in Upgraded Databases Could Lead to

Access Errors in ASE 12.0 and 12.5 at

http://my.sybase.com/detail?id=1012553

• Problems Affecting text data Following Upgrade to Adaptive Server Enterprise

12.0 or 12.5 at http://my.sybase.com/detail?id=1012153

• Avoiding text and image Problems With ASE 12.0 and 12.5 at

http://my.sybase.com/detail?id=1013522

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