spiralbound.net

• Data and Technology

  Posted on March 17th, 2008

  Written by cliff

  Tags

  10G, database, kernel, linux, oracle, parameters, preinstall, profile, requirements, rhel, sysctl

  RHEL System Configuration Changes for Oracle 10G

  

  Below is a list of RHEL system configuration changes that Oracle 10G requires before it is installed.
  First, check the following kernel parameters using the commands below:

  /sbin/sysctl -a | grep kernel.shmall
  /sbin/sysctl -a | grep kernel.shmmax
  /sbin/sysctl -a | grep kernel.shmmni
  /sbin/sysctl -a | grep kernel.sem
  /sbin/sysctl -a | grep fs.file-max
  /sbin/sysctl -a | grep net.ipv4.ip_local_port_range
  /sbin/sysctl -a | grep net.core.rmem_default
  /sbin/sysctl [...]

• Data and Technology

  Posted on October 16th, 2006

  Written by cliff

  Tags

  adaptec, Alan Baker, disk, faq, HowTo, kernel, kernel module, linux, lun, mkinitrd, modules.conf, multiple luns, raid, raid array, RHEL 3, RHEL 4, scsi, scsi channel, scsi RAID array, storage

  Making RHEL 3 See Multiple LUNS

  

  For some reason RHEL 3 comes out of the box configured to see only the first Lun on a SCSI channel. This is usually not a problem, as the first Lun is all you care about, but in some instances, you will need to configure the SCSI module to see multiple Luns.
  In this case [...]

• Data and Technology

  Posted on March 31st, 2006

  Written by cliff

  Tags

  kernel, kernel tuning, max number of processes per user, max number processes, maxuprc, max_nprocs, ncsize, ndquot, per-user processes, set maxuprc, set maxusers, set max_nprocs, set ndquot, set ufs_ninode, solaris, sysdef -i, user processes, v.v_maxup, v.v_proc, VFork failed

  Increase The Max Number of Processes Per UID in Solaris

  

  If you are running solaris 8 or 9, and getting strange errors like:
  “VFork failed”
  when you try to run commands, or
  “Mar 31 10:40:32 sauron genunix: [ID 748887 kern.notice] NOTICE: out of per-user processes for uid 1234″
  from the dmesg command output, the most likely cause is that you have exceeded the maximum number of processes per user [...]

• Data and Technology

  Posted on July 19th, 2005

  Written by cliff

  Tags

  block size, computing, HowTo, kernel, lto2, media, netbackup, number_data_buffers, shared memory, size_data_buffers, solaris, solaris 9, storage, system administration, technology, veritas

  NetBackup, Solaris 9, and LTO2 drives

  If you are using Veritas NetBackup on Solaris 9 with LTO Ultrium-2 tape drives, you will be constantly annoyed by slow tape write performance unless you use blocks of at least 256KB.
  To resolve this, the first thing you’ll want to do is increase both the number of buffers and the buffer size on the media [...]

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