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Today, developers continue to develop and deploy applications that use the lamp (Linux?, Apache, MySQL, and Php/perl) architectures. However, server administrators often have little control over the application itself, because the application is written by someone else. This article focuses on tuning the database layer to achieve maximum efficiency. There are 3 ways to speed up the running of the MySQL server, from low to high efficiency: Replace the problematic hardware. Tuning the MySQL proc
Each of the good color palette works are repeatedly carved and carefully beautified. Need to take pictures of light, color, detail and other parts in the most beautiful way to present. It may be time-consuming to operate, be patient. Original Final effect 1. Copy a layer. Look at the picture as a whole, feel too dark, and there are some details of the backlight on the face. So dot tool bar image-adjust-dark harmonic high light, default. If you feel too gray, properly r
Monochrome pictures are quickly replaced by channels, replacing them with less-colored pictures. Later use the Color palette tool can quickly turn to their desired monochrome, and then fine-tune the high light and character color can be. Original Tutorial Final Results 1, open the material picture, press CTRL + J to copy a layer of background layer. Enter the channel panel, select the green channel, press CTRL + A all se
$capacity = $arg 0._m_impl._m_end_of_storage - $arg 0._m_impl._m_startset $size _max= $size -1endif $ARGC NBsp;==1# If there is only one parameter, Description requires printing out all elements of the vector set $i =0 while $i All the instructions are written in the comments above, you have to realize it! If the print command can be like a template function in C + +, it can be "biased" for a particular type. There is a problem with the above: In the "P * ($arg 0._m_impl._m_start + $i)" comm
functions do not establish a query cache. PHP is very fast to establish connections, all of which can be used without a connection pool, or it may cause more than the number of connections. Of course, without the connection pool PHP program may also be The number of connections is full, such as @ignore_user_abort (TRUE); Use IP instead of domain name to do database path, avoid DNS parsing problem 11. EndYou will find that after optimization, the performance of the database is i
I/O subsystem failures.Kernel.sem :Take Kernel.sem = 250 32000 100 128 For example:250 is the value of the parameter SEMMSL, which represents the maximum number of semaphores that can be contained in a semaphore collection.32000 is the value of the parameter Semmns, which indicates the maximum number of semaphores that can be allowed within the system.100 is the value of the parameter semopm that represents the number of operations that a single semopm () call can perform on a semaphore collect
Tags: OracleIdentify the current state of the system Model of the system server CPU the speed and quantity of Memory size I/O Equipment Situation Network status Number of system users and number of concurrent users Current system CPU usage, Memory utilization currently I/O the state of the system (average read-write response time, I/O wait time, etc.) So how do you get the information you need? For the model of the system server, the speed of the CPU, and the amo
and DELETE statements, SQL Server is going to maintain your nonclustered indexes. For your database, you just created an index of "pure" wasted space. On the other hand, you have satisfied the query optimizer by eliminating the missing index recommendation. But this is not the purpose: the goal is to create an index that will be used again.Conclusion: Never trust the query optimizer!SummaryToday's article is a little controversial, but I want you to show it to you, but when you create an index,
Tutorial describes the color palette for dark blue pictures. Process is also relatively simple, as long as the darkened part of the selection, the new layer with a dark blue fill, and then appropriately change the layer blending mode remember to get the blue picture, later add some complementary color can be. Original Final effect 1, open the original material, create a gradient map adjustment layer, color settings such as Figure 1, to determine the layer blending mode
HD tune how to use? HD tune in the domestic very popular, and other commonly used hard disk detection software, there are domestic users of Chinese version. The software officially offers a green version of the installation version, which can be used in the form of reconciliation, and you may choose according to your preferences. Below, we will look at how to use HD t
), read a lot of explanation of the terms of the use of the double tune, I understand the double tune in this problem is the idea of the whole closed route to expand a point, because the problem is required from the left to the right side of the scan, and then from the right side of the You might as well start with the left-most point as the starting point (exactly the right end, no longer repeat).We need a
Photoshop tune field couple picture Fantasy Lavender, tutorials introduce very nice purple tune picture palette method. Roughly divided into three major steps: First, the basic image of the restoration, including the overall color and the character of the part. Then the main color adjustment, this step is more important, adjust the time to be meticulous, to the picture of the level of the sense of the
To the users of Photoshop software for detailed analysis to share a picture of the autumn yellow tune village scenery photos. Tutorial Sharing: The original film is as follows: Autumn season, the year's most colorful season arrived. I think you have friends have already been gearing up, planning lines, want to the most beautiful autumn income of their own picture library. However, in our actual shooting, always enco
1, if bought a new hard disk can pass benchmark function test hard disk read and write speed, read and write test is a radio, please pay attention to choose. It's worth noting that the lowest speed and the highest speed 2, the wrong scan is to sweep the hard drive is not bad, if the hard drive on the bad road will lead to the system of the phenomenon of the crash. If there is an HD tune performance is shown in red small squares. Normal di
How to tune the "High Ash" hue? "Gray tune" is now a lot of people are pursuing the tone, then, from the technical point of view, how to put this elegant color in the photo effect on it? First grasp a few keywords: advanced gray, low saturation, coordination color, high ash should be a color or a group, through the color of harmony so that the purity bias to low saturation, The use of coordinated color to p
HD Tune Pro How to use? The following is an example of HD tune pro4.01 version, briefly introduced. Test hard drive for Hitachi 500G 5400 rpm. The name of the hard drive and the current hard drive temperature are displayed. 2. Click Start test of course the drive in the current system environment reading speed. Hard drive brand recognition (now notebook mainstream hard drive) Number of brands of
Original Final effect 1, get back the details of the dark: This photo loss of a part of the dark part of the details, through the shadow of the high light tool to find a part, easy to later operation. 2, create a new transparent layer, using the "liquefaction", "Clone Stamp", "Patch" and "Stain repair brush" tool to handle the skin and background of the person to
See above -collect high-quality callout data-Input and output data are normalized to prevent numerical problems, and the method is the principal component analysis of what.-Initialization of parameters is important. Too small, the parameters are not moving at all. General weight parameter 0.01 mean variance, 0 mean value of Gaussian distribution is omnipotent, not to try to bigger. The deviation parameter is all 0.-with SGD, Minibatch size 128. or smaller size, but the throughput becomes small
The main idea: give n points, ask you to go from the leftmost point to the rightmost point, each point must be traversed, and each point can only walk once, ask the shortest distance to formThe idea of solving a problem: using DP[I][J] to indicate that the first person walked to the point I, the second person walked to the first J Point and had traversed the shortest distance of all points of 1–max (I,J). Because dp[i][j] = Dp[j][i], so we set i > JThen there isWhen J When j = = i + 1 o'clock th
print the result to the standard output from the beginning of a line. The tour length, a floating-point number with the fractional digits, represents the result.Note: An Input/output sample are in the table below. Here there is the data sets. The first one contains 3 points specified by theirx and y coordinates. The second point, for example, has thex coordinate 2, and the y coordinate 3. The result for each data set was the tour length, (6.47 for the first data set in the given example).Sample
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