Seagate ST43401N/ND Guida di Installazione Scaricare il pdf (Pagina 72)

If Your Version is 11.5 or 11.9.x

However, be cautious about adding new statistics to the production

environment until you have determined your needs and tested any changes. Not

all new statistics are needed or helpful in every environment.

Warning! Making unneeded changes to statistics may adversely affect

performance. In addition, running the

update statistics command with

incorrect parameters may change the number of steps in a histogram and

impact performance. Apply changes first in a test environment. See the

Performance and Tuning Guide at

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

as/asg1250e/perf/@Generic__BookView for information.

Trace Flag 326

trace 326 no longer exists in ASE 11.9.2 or above. In pre-11.9.2 trace 326 used

arithmetic averaging to establish the total density value rather than the default

geometric averaging. If you used

trace 326 in earlier versions of ASE (perhaps

in the RUNSERVER file with the

-T flag) you now have to manually change the

total density value via

optdiag.

If Your Version is 11.5 or 11.9.x

This section covers the following topics:

• Documentation Changes

• Backup Server

• Suspending Updates to Databases for Copying

• New Unix File System Device Support

• Changes to dbids

• CIS Proxy Databases

• ASE Plug-in for Sybase Central

• The sybsyntax Utility

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Seagate ST43401N/ND Guida di Installazione Pagina 72