Lpxus.Msb File Read Repeatedly Causing Performance Overhead
(Doc ID 1332495.1)
Last updated on FEBRUARY 12, 2019
Applies to:Oracle Database - Enterprise Edition - Version 126.96.36.199 to 188.8.131.52 [Release 11.2]
Oracle Database Cloud Schema Service - Version N/A and later
Oracle Database Exadata Express Cloud Service - Version N/A and later
Oracle Database Exadata Cloud Machine - Version N/A and later
Oracle Cloud Infrastructure - Database Service - Version N/A and later
Information in this document applies to any platform.
In an Oracle Server 184.108.40.206 while running insert statements into a table having an xmltype column, the file
$ORACLE_HOME/xdk/mesg/lpxus.msb is opened for each insert even if there is no error raised by the statement.
This is observed running truss/strace against the process where the insert statement is running: the output files
shows several open command for the file $ORACLE_HOME/xdk/mesg/lpxus.msb, for example
kopen("/grdbms/64bit/app/oracle/product/1120/xdk/mesg/lpxus.msb", O_RDONLY) = 14.
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