Ok, so I have my sga tuned by the advisor in 10g but I have a library cache hit ratio constantly below the recommended threshold of 90%. How the heck do I tune it? Do I just increase the sga_target? ciao, Brian This email message may contain legally privileged and/or confidential information. If you are not the intended recipient(s), or the employee or agent responsible for the delivery of this message to the intended recipient(s), you are hereby notified that any disclosure, copying, distribution, or use of this email message is prohibited. If you have received this message in error, please notify the sender immediately by e-mail and delete this email message from your computer. Thank you.