Трассировка процессов в UNIX

Трассировка процесса по PID:

В Linux:

strace -f -o /tmp/trace.log -p < PID >

В Solaris:

truss -faied -o /tmp/trace.log -p  < PID >

Используйте  CTRL+C для завершения трассировки. 


Трассировка приложений:

В Linux:

strace -f -o /tmp/trace.log  < PROGRAM >

В Solaris:

truss -faied -o /tmp/trace.log   < PROGRAM >




Пример:

$strace -f -o /tmp/trace.log $ORACLE_HOME/bin/sqlplus / as sysdba



You may see some (Permission denied) in the trace.log like the following:

21810 open("/oracle/PROD/db/tech_st/11.1.0/admin/PROD_erptest/diag/rdbms/prod/PROD/alert/log.xml", O_WRONLY|O_CREAT|O_APPEND, 0664) = -1 EACCES (Permission denied)
......

21810 open("/oracle/PROD/db/tech_st/11.1.0/admin/PROD_erptest/diag/rdbms/prod/PROD/trace/alert_PROD.log", O_WRONLY|O_CREAT|O_APPEND, 0664) = -1 EACCES (Permission denied)


The 'ls' command should show permissions 6751 (as follows)

Please check permissions by running:

$ cd $ORACLE_HOME/bin
$ ls -l oracle


The output should show the correct permission which is:

-rwsr-s--x 1 oracle dba


If not, then please execute the following to correct the permissions:

$ cd $ORACLE_HOME/bin
$ chmod 6751 oracle
$ ls -l oracle