My Oracle Support Banner

Parallel Query Fails with ORA-600 [15764] (Doc ID 839536.1)

Last updated on MAY 22, 2018

Applies to:

Oracle Server - Enterprise Edition - Version: to - Release: 10.2 to 11.2
Information in this document applies to any platform.


A select statement running in parallel failed with ORA-600 [15764].

The tracefile showed the following call stack:

----- Call Stack Trace -----
kxfprigdb <- kxfpqrgdb <- kxfxgs <- kxfxcw <- qerpxFetch <- opifch2 <- kpoal8 <- opiodr <- ttcpip <- opitsk <- opiino <- opiodr <- opidrv <- sou2o <- opimai_real <- main <- start

The tracefile also showed the process state was busy holding a child latch:

Process global information: 
     process: 7000004748eaa00, call: 700000443d33870, xact: 0, curses: 700000474e203c8, usrses: 700000474e203c8 
  SO: 7000004748eaa00, type: 2, owner: 0, flag: INIT/-/-/0x00 
  (process) Oracle pid=157, calls cur/top: 700000443d33870/700000443d33870, flag: (0) - 
            int error: 0, call error: 0, sess error: 0, txn error 0 
  (post info) last post received: 0 0 249 
              last post received-location: kxfprienq: QC 
              last process to post me: 700000474914f40 186 0 
              last post sent: 0 0 250 
              last post sent-location: kxfprienq: slave 
              last process posted by me: 700000474914f40 186 0 
    (latch info) wait_event=0 bits=10 
      holding    (efd=7) 700000472e4a838 Child process queue reference level=4 child#=99   
      Location from where latch is held: kxfprigdb: KSLBEGIN: addr qref  <---
        Context saved from call: 504403177372952360 
        state=busy, wlstate=free  <----
    Process Group: DEFAULT, pseudo proc: 700000474a384f0 
    O/S info: user: oracle, term: UNKNOWN, ospid: 2351144 
    OSD pid info: Unix process pid: 2351144, image: oraclePPSOLTP1@psoldbap003


To view full details, sign in with your My Oracle Support account.

Don't have a My Oracle Support account? Click to get started!

My Oracle Support provides customers with access to over a million knowledge articles and a vibrant support community of peers and Oracle experts.