Howdy, > I am considering purchase of JProfiler, OptimizeIt 5.5, or JProbe. Does > anyone have wisdom to share on the features of each? Are there other good > profilers I should consider?
I like OptimizeIt, having used them all. But the features are fairly similar. A Profiler is a key tool I highly recommend using frequently. However, profilers are not designed for production use. They will require much more memory (often an order of magnitude) and slow down the system (again, often by an order of magnitude or more) when running. For production, there's no substitute for good logging that you can control at runtime, e.g. log4j. > We have been experiencing regular JVM crashes on our production Tomcat 4.1.24 What does the hs_err file say? > installation. Originally we were running the Sun HotSpot 1.4.1_02 client, > then server (on RH Linux 8.0). Now we've switched to BEA JRockit 8.1 and are > still having crashes, clearly something is bad in our code - or perhaps we Maybe you need to try on a different OS? A different linux kernel? On Solaris, for example, you will get JDK crashes unless you download the Sun OS patches for the JDK. > We recently migrated from a Windows 2000/ServletExec 3.1/Sun HotSpot client > 1.3.1 environment which didn't have these problems - I'm not sure what to > think at this point. And the code didn't change, right? You only migrated do a different OS and a different VM? > Please reply directly to me (and cc the list) as I receive only the digest > version. Use the archives ;) I like the ones at AIMS. Yoav Shapira ===== Yoav Shapira [EMAIL PROTECTED] __________________________________ Do you Yahoo!? Yahoo! Calendar - Free online calendar with sync to Outlook(TM). http://calendar.yahoo.com --------------------------------------------------------------------- To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
