Hello everybody (sorry for approximately english),
since the installation of our new Power7 - V7R1M0 (to replace a i5 V5R4M0 platform) and the installation of Zend Server 5.6 (to replace Zend Core) in CE edition 3 weeks ago, we have a recurrent problem of our web server.
Some times after start the Zend Server subsystem and the zendsvr http server, they appears a phenomena of saturation and very low time respond of the server. We MUST restart the subsystem and the server to retrieve a normal run. The problem doesn't appears every day, somedays they are no problem, or 1, or many times in one day (all the 45-60 minutes). When the problem appears, they are NOT message in QSYSOPR message queue and no high CPU using in ZENDSVR subsystem, QHTTPSVR subsystem or any subsystems. Also, they are not spooled files generated by Zendadmin profile who contains problems or explication to justify what happened.
We open a support cases for Zend and we made verification of configuration in fastcgi.conf (like the LANG change in fr_FR), level of PTF and they are no problem for us.
We have in our Zend Server a INTERNET web site (available in the web) with approximately 5000 connections per days and many web services (with 1500 requests per day). The server listen the 80 (http), 8000 (webservices) and 443 ports (https, SSL is active and check the good certificate). Every pages in the website or script in webservices do a connection to the Power7 and use the XMLToolikit to call programs or do SQL request. We NEED to have a constant and good availability.
We try to add configurations in httpd.conf like the configuration we have in the httpd.conf of our old Zend Core. We add MaxCGIJobs and StartCGIJobs to try to resolve the problem. After that, it apperas less but continue sometimes and with a high number in this two directives, no changes appears realy. We see configuration in fastcgi.conf like DynamicServers, is a track ? We see too configuration in the HTTPAdmin interface of IBM i (available by the 2001 port), try to changes configuration in CGI or requests properties but no effect.
Any ideas or suggestions to a special configuration of a internet-good availibility in the web ? Today we are in the wall because we can not to find the reason of the problem and also a solution to resolve that.
Than you very much for your help, we can send any configuration files or other informations if you need.