I PTF-ed this thread's subject to make it more germane. Why does any vendor today build a LRU-managed cache for its large DBMS? Or are there lots of operating systems extant on which such large DBMSes can run that do not have LRU-based virtual storage management algorithms?
Bill Fairchild -----Original Message----- From: IBM Mainframe Discussion List [mailto:IBM-MAIN@bama.ua.edu] On Behalf Of Anne & Lynn Wheeler Sent: Thursday, February 23, 2012 8:53 AM To: IBM-MAIN@bama.ua.edu Subject: Re: 5 Byte Device Addresses? As I previously mentioned, something similar happens with a large DBMS cache being managed by least recently used ... running in a virtual memory operating system. It is one of the reasons that virtual memory operating systems tend to have ways of biasing against selecting large DBMS cache pages (because they useage patterns tend to violate the assumption that the least recently used page will be the least probable page to be used in the future). ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to lists...@bama.ua.edu with the message: INFO IBM-MAIN
