FREE DOC ò READER Systems Performance º BRENDAN GREGG

BOOK ê Systems Performance Î Brendan Gregg

The Complete Guide to Optimizing Systems Performance Written by the winner of the 2013 LISA Award for Outstanding Achievement in System Administration Large scale enterprise cloud and virtualized computing systems have introduced serious performance challenges Now internationally renowned performance expert Brendan Gregg has brought together proven methodologies tools and metrics for analyzing and tuning even the most complex environments Systems Performance Enterprise and the Cloud focuses on LinuxR and UnixR performance while illuminating performance issues that are relevant to all operating systems You'll gain deep insight into how systems work and perform and learn methodologies for analyzing and improving system and application performance Gregg presents examples from bare metal systems and virtualized cloud tenants running Linux based UbuntuR FedoraR This isn't a book so much as it is a reference manual or an appendix It's nearly 800 pages of dense low level discussions of performance issues related to the CPU memory hard drive OS and so on The writing is very structured repetitive and dry and resembles a list of facts than prose If you have a specific performance issue and need to know how to say use DTrace to diagnose an issue with a memory leak this book is perfect If you're looking for something you can read cover to cover to generally improve your understanding of system performance this book probably isn't itIf you are going to read this I recommend reading the first few sections of each chapter which typically have a nice introduction to the architecture of the CPU memory etc They are also full of handy tables such as typical real world latencies and typical performance trade offs to consider eg cpu vs memory small vs large record sizes The remainder of each chapter is a deep dive into specific performance tools you can use which is handy as a reference but does not make for interesting reading otherwise as there is no way you can retain so much detailed info I'd also mention that since the author is a Solaris expert and creator of DTrace you will see a lot of information about both in every single chapterThe final chapter of the book is great it walks through a real world case study and shows how to use various techniues to analyze it and the thought process that goes into tracking down performance bottlenecks Seeing such a case study gives you a much better sense for the context in which the various performance tools should be used and some awareness of whether the data returned by those tools is normal or not This would have been a much better book if every chapter had been primarily focused on such case studies with all the other nitty gritty details tacked on solely as supporting information perhaps in an appendix

EBOOK Systems Performance

Systems PerformanceOn performance Optimizing CPUs processors cores hardware threads caches interconnects and kernel scheduling Memory optimization virtual memory paging swapping memory architectures busses address spaces and allocators File system IO including caching Storage devicescontrollers disk IO workloads RAID and kernel IO Network related performance issues protocols sockets interfaces and physical connections Performance implications of OS and hardware based virtualization and new issues encountered with cloud computing Benchmarking getting accurate results and avoiding common mistakes This guide is indispensable for anyone who operates enterprise or cloud environments system network database and web admins; developers; and other professionals For students and others new to optimization it also provides exercises reflecting Gregg's extensive instructional experience Brendan is probably the de facto authority in the performance world Brendan walks through the Linus Kernel internals and covers the performance of each areas like Memory CPU File Systems Disks Networks His methodologies for analyzing performance problems are must read for SREs and performance engineers The are plethora of tools that Brendan contributed in creating for Linux performance troubleshooting I love the easy to follow and structured approach of Brendan's writing Specifically the USE methodology drill down methodology the block diagram with tools should be at every desk of SREs production engineers and performance engineersMy only concern is that I'm too late to pick this first edition BPF tools are not covered and some contents are outdated for this point in timeIf you want to read this please wait till November 2020 till the book hit the stands

Brendan Gregg Î Systems Performance BOOK

FREE DOC ò READER Systems Performance º BRENDAN GREGG ¹ [PDF] ✪ Systems Performance Author Brendan Gregg – Johns-cycling-diary.co.uk The Complete Guide to Optimizing Systems Performance Written by the winner of the 2013 LISA Award for Outstanding Achievement in System Administration Large scale enterpriseCentOS and the illumos based JoyentR SmartOSTM and OmniTI OmniOSR He systematically covers modern systems performance including the traditional analysis of CPUs memory disks and networks and new areas including cloud computing and dynamic tracing This book also helps you identify and fix the unknown unknowns of complex performance bottlenecks that emerge from elements and interactions you were not aware of The text concludes with a detailed case study showing how a real cloud customer issue was analyzed from start to finish Coverage includes Modern performance analysis and tuning terminology concepts models methods and techniues Dynamic tracing techniues and tools including examples of DTrace SystemTap and perf Kernel internals uncovering what the OS is doing Using system observability tools interfaces and frameworks Understanding and monitoring applicati Do not let the size daunts you however Chapters are self contained as the author understands that the book might be read under pressure and contain useful exercises at the endWhat really makes this book stands out is not the top notch technical writing or abundance of useful one liners is the fact that the author moves forward and suggests a methodology for troubleshooting and performance analysis as opposed to the ad hoc methods of the past or best case scenario a checklist and DEITY forbid the use of “blame someone else methodology” In particular the author suggests the USE methodology USE standing for Utilization – Saturation – Errors to methodically and accurately analyze and diagnose problems This methodology which can be adaptedexpanded at will last time I checked the book was not written in stone is worth the price of the book aloneThe author correctly maintains that you must have an X ray so to speak of the system at all times By utilizing tools such as DTrace available for Solaris and BSD or the Linux euivalent SystemTap much insight can be gained from the internals of a systemChapters 5 10 are self explanatory the author presents what the chapter is about common errors and common one liners used to diagnose possible problems As said before chapters aim to be self contained and can be read while actually troubleshooting a live system so no lengthy explanations there At the end of the chapter the bibliography section provides useful pointers towards resources for further study something that is greatly appreciated Finally the exercises can be easily transformed to interview uestions which is another bonusCloud computing and the special considerations that is presenting is getting its own chapter and the author tries to keep it platform agnostic even if employed by a “Cloud Computing” company which is a nice touch This is followed by a chapter on useful advice on how to actually benchmark systems and the book ends with a sadly too short case studyThe appendices that follow should be read as they contain a lot of useful one liners as if the ones in the book were not enough concrete examples of the USE method a guide of porting dtrace to systemtap and a who is who in the world of systems performanceSo how to sum up the book? “Incredible value” is one thought that comes to mind “timeless classic” is another If you are a systems operator|engineer|administrator|architect this book is a must have and should be kept within reach at all times Even if your DAYJOB does not have systems on the title the book is going to be useful if you have to interact with Unix like systems on a freuent basis