I gave a presentation last night on debugging Java performance problems. I got a couple of requests to post links to the performance analysis tools I discussed, so here you go:
Garbage collection log visualization utility
Garbage collection visualization utility
Monitoring garbage collection with jstat
Observing object allocation with DTrace
I would like to thank everyone for attending, and hope to see ya’ll at a future meeting!
I just posted my article getting to know the Solaris iSCSI stack from the August ‘07 issue of SysAdmin magazine to my website. If you are looking to deploy Solaris iSCSI solutions in your environment, you might find the article useful.
I gave a presentation on the Solaris Fault Management Architecutre (FMA) at the Atlanta opensolaris users group meeting this evening. If your curious what was discussed, you can look through the slides that were used for the presentation. I would like to thank everyone for coming out, and for being such a great audience. I would also like to thank Scott Dickson for putting the meeting together, and for getting the attendees some tasty pizza!
I just posted my article Debugging Apache web server problems from the July ‘07 issue of SysAdmin magazine to my website. If the need arises for you to debug problems with a server running Apache, hopefully the items described in the article will prove helpful.
I just posted my article Monitoring and managing Linux software RAID from the April ‘04 issue of SysAdmin magazine to my website. While some of the information has been made obsolete by the incredible mdadm utility, there is still some useful stuff in there.
I recently passed the Sun Certified System Administrator For Sun Cluster 3.2 exam, and thought I would share my thoughts on the exam in case others are interested in taking it. When I decided to take the exam, I had limited experience with Sun Cluster 3.X, and didn’t have money for a training course. To prepare for the certification exam, I first read the following documents cover to cover (I didn’t read the entire developer’s guide, just parts of it to better undertand how data services actually work):
Sun cluster 3.2 concepts guide
Sun cluster 3.2 system administration guide
Sun quorum server reference manual
Sun cluster 3.2 data service for Oracle guide
Sun cluster 3.2 data service for Oracle RAC guide
Sun cluster 3.2 data service developer’s guide
In addition to the documents listed above, it is also important to understand how Solaris Volume Manager and Veritas Volume Manager work in clustered environments. While I can’t go into test specifics due to the agreement I signed when I took the exam, you should fair pretty well if you read through the documents listed above, and understand each of the items listed in the Sun cluster certification objectives. I made sure I knew the objectives by creating a two column table and placing each objective in it’s own cell on the left side of the table, and then filling in the cell on the right side of the table as I came across information relating to the objective. I then used this information to cram the week of the exam, and now have it available as a reference. If you decide to take the exam, good luck!!! Let me know what you thought of it!!
I just posted my article Veritas volume manager recovery features to my website. If your are interested in learning about several techniques that can be used to protect servers running VxVM, you might be interested in the article.
I just posted my article observing I/O behavior with the DTraceToolkit to my website. If your interested in learning more about how to analyze I/O behavior on Solaris 10 and Nevada hosts, you might be interested in the article. I would like to thank Brendan Gregg for proofreading the article for me.