How To Fix DB6546 - Threshold for starting the asynchronous page cleaners

SAP Error Message - Details

• Message type: E = Error

• Message class: DB6 - DB6: Alert Monitoring and Alert Configuration

• Message number: 546

• Message text: Threshold for starting the asynchronous page cleaners

<LB>&CAUSE&</>
By setting this database configuration parameter (CHNGPGS_THRESH), you
determine at what number of changed pages in the buffer pool should
these be written asynchronously to the database. This is done by the
Page Cleaner.

System Response

If you set too high a value for the parameter, it may be that pages are
not written to the database on time. These pages are then written
(before they are replaced because of lack of space) synchronously; that
is, the application must wait until the page that is to be replaced has
been written.
On the other hand, if too low a value is set for the parameter, the
system will write pages to the database unnecessarily often.

How to fix this error?

If errors occur, correct the parameter using the command:
<LB>UPDATE DB CFG USING CHNGPGS_THRESH <value></>
You can find more information about this topic in the messages for the
<DS:NA.DB6152>Page Cleaner</>.

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message DB6546 - Threshold for starting the asynchronous page cleaners ?

  The SAP error message DB6546 indicates that the threshold for starting the asynchronous page cleaners has been reached. This typically relates to database performance and memory management within the SAP system, particularly when using databases like SAP HANA, Oracle, or others.
  
  Cause:
  The error occurs when the database system detects that the memory usage has reached a certain threshold, which triggers the need for asynchronous page cleaners to start cleaning up memory pages. This can happen due to:
  
  High Memory Usage: The database is consuming a lot of memory, which may be due to large transactions, insufficient memory allocation, or inefficient queries.
  
  Configuration Issues: The parameters for memory management and page cleaning may not be optimally configured.
  Database Load: A high load on the database can lead to increased memory usage and trigger this error.
  Fragmentation: Over time, memory can become fragmented, leading to inefficient use of available memory.
  
  
  Solution:
  To resolve the DB6546 error, consider the following