General Unix rule of thumb is that swap must be twice real ram. That's been around for a VERY long time & never fails. BTW: from the Oracle Solaris installation manual: 2.2 Checking the Hardware Requirements The system must meet the following minimum hardware requirements: * At least 1024 MB of physical RAM * The following table describes the relationship between installed RAM and the configured swap space requirement. RAM Swap Space Between 1024 MB and 2048 MB 1.5 times the size of RAM Between 2049 MB and 8192 MB Equal to the size of RAM More than 8192 MB 0.75 times the size of RAM * * 400 MB of disk space in the /tmp directory * Between 1.5 GB and 3.5 GB of disk space for the Oracle software, depending on the installation type * 1.2 GB of disk space for a preconfigured database that uses file system storage (optional) That comes to 12GB in your case. ______________________________________________________________ Dick Goulet / Capgemini North America P&C / East Business Unit Senior Oracle DBA / Hosting Office: 508.573.1978 / Mobile: 508.742.5795 / www.capgemini.com Fax: 508.229.2019 / Email: richard.goulet@xxxxxxxxxxxxx 45 Bartlett St. / Marlborough, MA 01752 Together: the Collaborative Business Experience ______________________________________________________________ ________________________________ From: oracle-l-bounce@xxxxxxxxxxxxx [mailto:oracle-l-bounce@xxxxxxxxxxxxx] On Behalf Of Alvaro Jose Fernandez Sent: Friday, October 05, 2007 9:46 AM To: andrew.kerber@xxxxxxxxx; oracle-l Subject: RE: oracle/solaris 10 memory and swap Andrew, >My sysadmin says 8g swap is plenty. Before I ask him to show me his Oracle dba credentials, can someone point me to a somewhere that has more informatiion on this. I runned a 9207 RAC on Solaris 9 64bits, with vxvm also and suncluster 3.0 (2-node), DISM configured and used, and have in the past problem due to swap shortage. Sorry I cannot tell you specifics abot Solaris 10 (for the shmmax settings), but based on the previous experience, allocating 12 Gbyte of swap for a 16 Gbyte node is not unreasonable at all. If the sysadm gets picky about this, tell him to put in writing the decision :-) alvaro This message contains information that may be privileged or confidential and is the property of the Capgemini Group. It is intended only for the person to whom it is addressed. If you are not the intended recipient, you are not authorized to read, print, retain, copy, disseminate, distribute, or use this message or any part thereof. If you receive this message in error, please notify the sender immediately and delete all copies of this message.