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Oracle-common monitoring SQL

, column_position;6. Monitor SGA hit rate Select a. Value + B. Value "logical_reads", C. Value "phys_reads ",Round (100 * (A. Value + B. Value)-C. Value)/(A. Value + B. Value) "buffer hit ratio"From v $ sysstat A, V $ sysstat B, V $ sysstat CWhere a. Statistic # = 38 and B. Statistic # = 39And C. Statistic # = 40; 7. Monitor the hit rate of the Dictionary Buffer in SGA Select parameter, gets, getmisses, getmisses/(gets + getmisses) * 100 "miss ratio ",(1-(sum (getmisses)/(sum (gets) + sum (g

I2C bus-based electro-mechanical memory fm31256 with watchdog and real-time clock

through a common interface to replace multiple components on the system board. Memory read/write and other control functions are implemented through the Industrial Standard I2C bus. Figure 1 shows the schematic of fm31256. The SDA and SCL pins are used for data exchange and command writing with the CPU. The data output has Schmidt triggers to improve anti-interference performance. At the same time, SDA serves as a bidirectional signal line in the sec

Oracle basic knowledge-3

= user_indexes.index_name And user_ind_columns.table_name = user_indexes.table_name Order by user_indexes.table_type, user_indexes.table_name, User_indexes.index_name, column_position; 150. How to monitor the SGA hit rate? Select a. Value + B. Value "logical_reads", C. Value "phys_reads ", Round (100 * (A. Value + B. Value)-C. Value)/(A. Value + B. Value) "buffer hit ratio" From v $ sysstat A, V $ sysstat B, V $ sysstat C Where a. Statistic # = 38 and B. Statistic # = 39 And C. Statistic # = 40

This article introduces the development of embedded experience. It is well written and pertinent and suitable for reading.

to meet the current requirements. In this way, when the transaction requirements are gradually improved, and if there is still room for processor performance, the current product can be reused; the second option is to choose a chip that will not be discontinued soon. Many processors are widely used and many materials can be used for reference. However, it is likely that this chip has been popular in the market for a long time, chip manufacturers have already released replacements. If you choose

SQL statement for Oracle database performance monitoring

user_indexes.table_type, user_indexes.table_name,User_indexes.index_name, column_position; 6. Monitor SGA hit rate Select a. Value + B. Value "logical_reads", C. Value "phys_reads ",Round (100 * (A. Value + B. Value)-C. Value)/(A. Value + B. Value) "buffer hit ratio"From v $ sysstat A, V $ sysstat B, V $ sysstat CWhere a. Statistic # = 38 and B. Statistic # = 39And C. Statistic # = 40; 7. Monitor the hit rate of the Dictionary Buffer in SGA Select parameter, gets, getmisses, getmisses/(g

Improve the hit rate and Related Optimization of Oracle databases (1)

Improve the hit rate and Related Optimization of Oracle databases (1) Oracle DatabaseIt can be said that the database industry occupies a very important position and leads the development of the database. This article is about Oracle Database debugging andOptimizationThis article mainly introduces Oracle DatabaseHit rateRelated issues, including performance comparison between different algorithms. Computing of various hit rates in Oracle and related Tuning 1) hit rate of library cache: Calculati

Performance monitoring-SQL statement monitoring

. phywrtsFrom v $ datafile A, V $ filestat BWhere a. File # = B. File #; Monitor the hit rate of the Dictionary Buffer in SGA Select parameter, gets, getmisses, getmisses/(gets + getmisses) * 100 "miss ratio ",(1-(sum (getmisses)/(sum (gets) + sum (getmisses) * 100 "hit ratio"From v $ rowcacheWhere gets + getmisses Group by parameter, gets, getmisses; Monitor the hit rate of the shared cache area in SGA, which should be less than 1% Select sum (PINs)

What are the memory interface types

An introduction to the analysis of memory interface types: The memory interface type of the gold finger is divided according to the number of conductive contacts on the finger of the memory stripe. The conductive contacts on the Goldfinger are also used to refer to pins (PIN numbers). The number of pins used for each interface type varies depending on the type of interface used for different memory. Noteb

Detailed JavaScript realization Waterfall flow Absolute layout _javascript skill

last column var padding = main.clientwidth-col * $ ('. Pin ') [0].offsetwidth; return PADDING/2; var getComputedStyle = function (ele) {//compatible with IE support if (window.getcomputedstyle) {return window.getcomputedstyl E (ele); else {return ele.currentstyle; } var getpinpad = function () {//Get pin's padding value var pin = $ (". Pin")[0]; Return parseint (getComputedStyle (PIN). Paddingleft); return function () {//Set width main.style.padding = ' 0 ${getpadding ()}px 0 ${getp

Digital multimeter to measure the polarity of transistors and the methods of NPN and PnP

How to use the digital Universal meter to measure the polarity of transistors and the method of NPN, PNP . First of all, say the pointer of the multimeter and the digital multimeter of the red-black pen and the internal battery connection difference;So there are some differences between the two types of tables. Next, just talk about how to use the digital measurements. Use a digital multimeter buzzer gear.①, fixed base pole (b)Select the transistor of the two

Oracle Daily Monitoring statements

user_ind_columns.table_name = User_indexes.table_nameOrder by User_indexes.table_type, User_indexes.table_name,User_indexes.index_name, column_position; 6. Monitor the ratio of the SGA Select A.value + b.value "logical_reads", C.value "Phys_reads",Round ((a.value+b.value)-c.value)/(A.value+b.value)) "BUFFER hit RATIO"From V$sysstat A, V$sysstat B, V$sysstat cwhere a.statistic# = b.statistic# = 39and c.statistic# = 40; 7. Monitor the dictionary buffer hit ratio in the SGA Select parameter, gets,

Parse waterfall stream layout: Implementation of JS + absolute positioning _ javascript skills

bucket.Var numrentmath.floor(document.doc umentElement. clientWidth/aPin [0]. offsetWidth); // get-Number of block boxes in each row-num [window width divided by the width of one block box] OParent.style.css Text = 'width: '+ iPinW * num + 'px; margin: 0 auto;'; // use the cssText attribute to add a center style for the parent main: fixed width + automatic horizontal margin The Code is as follows: Function getClassObj (parent, className ){Var obj = parent. getElementsByTagName ('*'); // obtai

Benefits of replacing wm9714 of Wolfson with wm9713

analogue in/out internal reference voltage (normally avdd/2, if not overdrive33 out4 analogue output auxillary output driver (speaker, line or headphone)34 spkgnd supply speaker ground (feeds output buffers on pins 33, 35, 36 and 335 spkl analogue output left speaker driver (speaker, line or headphone)36 spkr analogue output right speaker driver (speaker, line or headphone)37 out3 analogue output auxillary output driver (speaker, line or headphone)38

Auxiliary Functions for DirectShow

;Ibasefilter * pF = 0;Hresult hR = cocreateinstance (CLSID, 0, clsctx_inproc_server,Iid_ibasefilter, reinterpret_cast If (succeeded (HR )){HR = pgraph-> addfilter (PF, wszname );If (succeeded (HR ))* PPF = PF;ElsePF-> release ();}Return hr;} /*----------------------------------------------------------------------------------This function finds an unconnected pin on a filter The following function searches on a filter for an unconnected pin,Either input or output. It returns the first matching pi

FPGA Implementation and Driver Design of PCI bus protocol

+ pluⅱ software platform of Altera, and the hardware description language uses the Altera HDL language, which can also be easily converted to the VHDL or VerilogHDL language. Before that, the definition of PCI bus signal is introduced.    2.1 bus signal Definition    Based on PCI Bus Protocol Version 2.2, the PCI interface in device mode contains at least 47 pins. Figure 2 shows the distribution of pins by

Mbed platform I/O

Tags: HTTP Io SP data on log cti bs ad It's nothing more than digital Io and analog Io Digital Io Digitalout-configure and control a digital output pin. Digitalin-configure and control a digital input pin. Digitalinout-bi-directional digital pins Each page on the mbed website has a hardware diagram to show you the pin name. The blue labels can be used as digital Io. If digitalout is used, 0 is off, and 1 is on; In digitalin, i

Computer motherboard knowledge

representative of the two mainstream chipset types to illustrate what the chipset is and how it works. Let's take the mainstream intel BX chipset as an example. It consists of two chips. Beiqiao is the one labeled with "AGP set" on the main board. Its learning name is "12743bx", and the chip is also engraved with the factory id and origin. It is responsible for the generation of CPU, memory, AGP, and external frequency, as well as the connection and speed with the nanqiao chip, which can be sai

Linux interrupt and interrupt handling

the system. No matter what the CPU is doing, some necessary hardware support must be provided to interrupt the device. Almost all general-purpose processors such as alpha AXP use an approximate method. Some physical pins of the CPU are designed to change the voltage (for example, from + 5 V to-5 V), causing the CPU to stop the current job and start executing the special code for handling the interrupt: the interrupt handler. One of these

Raspberry Pi Document Translator-use-GPIO: Raspberry Pi A and B

Https://www.raspberrypi.org/documentation/usage/gpio/README.md2016/6/25GPIO: Raspberry Pi A and B# #介绍GPIO和在树莓派上进行物理编程The powerful feature of the Raspberry Pi is the GPIO (general purpose input and output) pins that surround the board, right next to the yellow video output jack.GPIO PinsThese pins are the physical interfaces of the PI and the outside world. The simplest, you can think of them as switches th

LPC1800 and LPC4300 Boot

When programming and running code from the external flash, it's particularly important to make sure so you have the Boo T pins P2_9, P2_8, P1_2, and p1_1 is correctly connected so this MCU starts execution from the correct memory address . For more details, please see the NXP documentation.If The boot pins is incorrectly set, then this would typically result in the initial default breakpoint set by the Debu

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