Results 1 to 6 of 6
  1. #1
    Join Date
    Apr 2009
    Posts
    16

    Unanswered: User Mode to Kernal Mode and Back

    "When a user process runs a portion of the kernal code via a system call, the process temporarily becomes a kernel process and is in the kernel mode. While in kernel mode, the process will have root (i.e administrative) privileges and access to key system resources. The entire kernel, which is not a process but a controller of processes, executes only in kernel mode. When the kernel has satisfied the request by a process, it returns the process to user mode."

    Does Oracle do this? or does Oracle completly run in User Mode 100% of the time?

  2. #2
    Join Date
    Jun 2003
    Location
    West Palm Beach, FL
    Posts
    2,713

    Talking Yes.

    Yes, Oracle does that.

    In some of the Oracle libraries you will find executables owned by 'root'.
    The person who says it can't be done should not interrupt the person doing it. -- Chinese proverb

  3. #3
    Join Date
    Apr 2009
    Posts
    16
    Quote Originally Posted by LKBrwn_DBA
    Yes, Oracle does that.

    In some of the Oracle libraries you will find executables owned by 'root'.
    Any suggestions on the best way to indentify these? I ask because we are currently looking to change the Kernal to User Mode Ratio on our 32 Bit Operating System from the default 2GB for the Kernal Mode and 2 GB on the User Mode. To the /3GB paramenter switch where you leave 1GB for the Kernal and 3 for the User Mode. We are doing this due to recieving an "Out of Memory" ORA-4030 Error.

  4. #4
    Join Date
    Aug 2003
    Location
    Where the Surf Meets the Turf @Del Mar, CA
    Posts
    7,776
    Provided Answers: 1
    It appears you are willing to trust advice from strangers who pay no price if or when answers prove wrong, rather than actually run actual tests to see results for yourself.

    With free advice, you get what you paid for it.
    You can lead some folks to knowledge, but you can not make them think.
    The average person thinks he's above average!
    For most folks, they don't know, what they don't know.
    Good judgement comes from experience. Experience comes from bad judgement.

  5. #5
    Join Date
    Jun 2003
    Location
    West Palm Beach, FL
    Posts
    2,713

    Talking Exactly!!

    I totally agree with anacedent, It seems I may have miss-understood the question.

    I myself fell once into the trap of applying "fixes" from a forum post related to some issue I was having, but the end result was they crashed my system (fortunately I had taken backup).

    Good luck!
    The person who says it can't be done should not interrupt the person doing it. -- Chinese proverb

  6. #6
    Join Date
    Aug 2003
    Location
    Where the Surf Meets the Turf @Del Mar, CA
    Posts
    7,776
    Provided Answers: 1
    If the only change you make is to add the /3GB parameter;
    I would expect the ORA-04030 errors to continue.
    You can lead some folks to knowledge, but you can not make them think.
    The average person thinks he's above average!
    For most folks, they don't know, what they don't know.
    Good judgement comes from experience. Experience comes from bad judgement.

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •