When I play "winter solstice", I found the first choice "Toshiba"
, IT industry self-advertisement or cultural aggression?
Many places are not a festival. If at home, I have a dumplings, so I have a porridge and dumplings at noon, and the result is still eaten in front of the workman. I have been busy all day, but many rushed reports I still done in advance, and went to get off work to celebrate, and their company's human-natured four-point off work (one hour in advance) plus overtime two hours, becoming me, etc. Half an hour ... is good, mainly because of the adjustment of the fixed storage procedure, the efficiency is more than not, greatly reduces the pain I am waiting for the computer.
Going back to the dormitory to go online, I will find it for a long time, I haven't finished the technology. Today, I read SG's adminii, announced the end of SG, but a lot of things just stayed on notes, backup, recovery still did not have done
Hey, who makes me so lazy? Open a long time ago
Oracle WAIT INTERFACE, just look at the beginning. I always feel that the old foreign writing book is very exciting, unlike a lot of books in China, starting with preamble and preface How the author is how or how this book is in history, if it is a rebuk, let People have to sit danger, washing their hands, as if they read the Buddhist scriptures. Foreign books often open a joke, or quote some literature, Bible classics, etc., most of them seem to be related to technology.
The author of Oracle Wait Interface is reviewing the history of OWI in the preface.
Speed
is the word that defines the twenty-first century. The previous century's saying, "He who dies with the most toys wins" is now "He who dies with the most high-speed toys wins." We want speed in everything we do, .................................... ..
This is the beginning of the first chapter, running the question first, huh, huh. Funny is:
Since the beginning of Oracle RDBMS, Oracle DBAs were taught to tune the database and instance by watching a few ratio numbers. The idea was to keep all database elements operating within acceptable ranges or limits. Some of the memorable ratios are the buffer cache hit ratio Library Cache Hit / Miss Ratio (ORACLE7.0), AND LATCH GET / MISS RTIO. WHO CAN Forget these Commandments?
Thou shalt keep thy buffer cache hit ratio in the upper 90 percentile. Thy data dictionary misses must be under 10 percent at all times, and thy library cache shall not covet thy data dictionary-it shall have its own ratios. Thy SQL area gethitratio and pinhitratio must also be in the 90 percentile at all times. Furthermore, the ratio of reloads to pins must not be more than 1 percent. If thy ratios are bad, thou shalt increase the shared pool size but thou shalt not steal the memory from the buffer cache. And while you are adding memory to the shared pool, throw some memory at the buffer cache also. It will increase the cache-hit ratio. Thy willing-to-wait latch hit ratios shalt be close to 1. If not, Thou May INCREASE SPIN_COUNT BUT THOU MUST BE CAREFUL NOT to KILL THY CPUS. And so on.lost yet? we are. Life can be much faster. NOT TO MENTION BETTER. Note, the first time I saw on computer books English, haha, it seems that oracle is growing up. I don't know if there is any perseverance to read this book, but at least here is enough to attract people. Take a look at Oracle's official textbook, look at this, oh ...
