Background documentation Log Files Locate the document in its SAP Library structure

For each database instance, the system creates a range of log files, depending on the actions that have been performed. These files are then stored in the run directory of the database instance and its subdirectories. If the run directory is not defined, the files are stored in the directory <independent_data_path>\wrk.

Log Files of the Database Instance

File Name (File ID, Class)

File Content

knldiag ( KNLDIAG, protocol)

Current kernel log; this log is created when the database instance is started with the size specified in KERNELDIAGSIZE.
Messages about starts in the operational state ADMIN are not overwritten cyclically.
Messages from the ONLINE state are overwritten cyclically.

knldiag.old ( KNLDIAGOLD, protocol)

Last kernel log
Each time the database instance is started, the file knldiag is renamed as knldiag.old.

knldiag.err ( KNLDIAGERR, protocol)

Kernel error messages
This file is not overwritten. New error messages are added to the end of the file.

knldiag.evt (KNLEVT, protocol)

Log of database events

knltrace (KNLTRC, dump)

Log file for the database trace
This file can also contain information on the causes of crashes. This file is initialized each time the database instance is started.

<database_name>.prt (KNLTRCPRT, protocol)

Test version of database trace

knldump ( KNLDUMP, dump)

Backup of the main memory information after a database crash

rtedump ( RTEDUMP, dump)

Memory dump from runtime environment of database instance

<database_name>.pah ( DBMPAHI, protocol)

History of database parameters

 

Log Files of Database Tools

dbm.*
dbahist.prt

Structure linkDatabase Manager Log Files

loader.prt

Structure linkLog file of SAP DB Loader (always saved to the directory <independent_data_path>\wrk)

 

Communication Log Files

xserver.prt

X-Server log file

 

Installation Log File

SAPDB<profile>_install-
<date>-<time>.log

Structure linkLog file of the standard installation of the database software (program SDBINST) or of the update of existing database software (program SDBUPD)

 

liveCache Log Files (for SAP Systems Only)

lcinit.log

Start or initialization of liveCache with CCMS functions from the SAP system

lcinit.his

History of all liveCache actions
Information from the log lcinit.log is added to this file.

lc<token>

Log of liveCache activities