oracle 获取trace文件名称

SELECT d.VALUE || '/' || LOWER(RTRIM(i.INSTANCE, CHR(0))) || '_ora_' ||
       p.spid || '.trc' trace_file_name
  FROM (SELECT p.spid
          FROM v$mystat m, v$session s, v$process p
         WHERE m.statistic# = 1
           AND s.SID = m.SID
           AND p.addr = s.paddr) p,
       (SELECT t.INSTANCE
          FROM v$thread t, v$parameter v
         WHERE v.NAME = 'thread'
           AND (v.VALUE = 0 OR t.thread# = TO_NUMBER(v.VALUE))) i,
       (SELECT VALUE FROM v$parameter WHERE NAME = 'user_dump_dest') d
通过以下命令转储Shared Pool共享内存的内容:
SQL>alter session set events 'immediate trace name heapdump level 2';