How To Fix HH045 - Die Datenbankpuffer-Schreibqualität könnte besser sein (BUFFERS?)

SAP Error Message - Details

• Message type: E = Error

• Message class: HH - (Long) text for check tool 'infcfgcheck'

• Message number: 045

• Message text: Die Datenbankpuffer-Schreibqualität könnte besser sein (BUFFERS?)

Was verursacht dieses Problem?

This is a single 'performance' check and therefore does not
describe a critical system status. It is neither necessary nor
time-critical to perform the steps described below, but they could
help improve the overall performance of your R/3 System.

Das System gibt eine Fehlermeldung aus und erlaubt Ihnen nicht, mit dieser Transaktion fortzufahren, bis der Fehler behoben ist.

The 'hit rate' of pages in the database buffer in percent is not
optimal for write accesses. A rate of at least 82% is considered to be
optimal. A better 'hit rate' can often be obtained by extending
the database buffer (thus reducing the 'displacement rate' of pages in
the buffer). On the other hand, the ONCONFIG parameter 'BUFFERS' should
not be increased if this is not necessary in order to keep the
use of Shared Memory (i.e. main memory) within reason.

Systemantwort

Wie behebe ich diesen Fehler?

Check the write quality of the database buffer regularly with
'onstat -p'. If the percent value is constantly below 82%, try
increasing the ONCONFIG paramter 'BUFFERS'. You can assume 20% of the
physical memory as a approximate value for the buffer size.
As user 'informix', edit file
'$INFORMIXDIR/etc/$ONCONFIG' ('BUFFERS' = number of pages).
CAUTION: The change will only become active when the database has
been started up.
Please also refer to Note 38307.

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