OnLine Internals and Performance Questions

Greetings: (Sorry if this seems familiar -- I posted last week but never saw it arrive ...) My environment is IFMX 7.20 on a 4 way HP K series system connected to two HP G class machines. On the G's are up to 600 users running applications thatneed to talk to the data base via standard IFMX net connections. At peak times, user performance drops dramatically (what should take scores of seconds takes scores of minutes). The only noticable constraint appears to be waits for polling threads. In trying to fix the problem, the following questions arose: - The IFMX docs say that MAXCPUVP should not exceed the real number of processors in the system. However, my CPU's are typically running at 50-65% utilization. Is there really anything that could go wrong if the number of CPU VP's were greater than physical processors? - The IFMX docs also say that the number of NET VP's should not exceed MAX CPUVP. However, again, if I am lacking poll threads, can I create socket threads with MAXCPUVP CPU VP's and MAXCPUVP NET VP's? THis would effectively double the number of VP's running socket threads -- but stay within the letter of the law regarding VP's greater than MAXCPUVP. - A related question is is it syntactically legal to have lines in the config file of: NETTYPE tlitcp,4,200,CPU NETTYPE tlitcp,4,200,NETWould the second line effectively replace the first? Would they both be used to instantiate the apprpriate VP's (a total of 8)? - Another relevant question has to do with the recycling and reuse policies of scoket threads. Are they released upon disconnect? Are all threads polled regardless of a connection on the other side? How much of a performance impact is there on having the number of possible connections set too high? Thanks in advance for all of the help. BTW -- we are looking for good Informix experience people if you happen to know someone . . . Jim Lenahan "If Informix is the Answer Data Basics International has the Solution" Data Basics International, Inc. Voice / 770-614-3999 400 Peachtree Industrial Blvd. Fax / 770-271-9004 Suite 5270 E-mail / JimLenahan@aol.com Suwanee, GA 30174 USA