Re: Using Oracle 6 and Oracle 7 simultaneously

Joaquim Areia Capitao (joaquim.capitao_at_jrc.it) wrote:
: Dear all,
 

: We have installed Oracle 7 a few weeks ago (version 7.0.15.4.0) and are
: transferring our Oracle 6 applications to the new version. At the same time,
: however, some of the users want to continue using the old version until
: they are confident that the new one is up and running.
 

: If we start Oracle 6 first and then Oracle 7, every time we try to open an
: instance with Oracle 7 we get error ORA-07279: spcre: semget error, unable
: to get first semaphore set.
 

: The same thing happens when we open an instance with Oracle 6 if version 6
: was started after version 7.
 

: What does this mean? Is it impossible to have both versions running in the
: same machine? We use a Sun Sparcstation with SunOS 4.1.4.
 

: Thanks in advance.
 

: Joaquim Areia Capitao
: joaquim.capitao_at_jrc.it

Sounds like you need the rebuild your UNIX kernel and allocate more semaphores. The Oracle Install & User Guide for Sun documents the 2 or 3 UNIX kernel parameters which control semaphores. Just take your current settings for the parameters and double them.

--
Gary Kirsh
Next Extent, Inc.
Phone: (718) 380-8546
Internet: gkirsh_at_dorsai.org