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, everything is very harmonious ah. Then why did you turn so long, Daisy? Why did you just crash?Look at timing:TTFB, what the hell, it took 10 minutes!Hurry and look at Nginx log:Hey... You've really spent 10 minutes.Look again, PHP log:Pop, the POST parameter is empty. Hurry and look at the other requests, no problem. There's a problem with that. A fright.Ask the left, "is it online?" "No", right, "Is it online?" "No," he said. ”Since the same set of code requests, only the file over 3M has

In Android apps, the most memory-intensive is the picture resource. And on Android , when reading bitmap bitmap, the stack size of the pictures in the virtual machine is only 8M, and if exceeded, a outofmemory exception occurs. Therefore, the memory optimization of the image is an important part of Android application development.1) to recover bitmap memory in timeThe bitmap class has a method recycle (), which can be seen from the method name meaning

file systems are collections of files, directories, and other data structures. The file system maintains the relevant information and identifies the specific location of the file or directory data. The file system also contains a boot block, a super block, a bitmap, one or more allocation groups. Allocation groups include disk index nodes and fragmentation (fragment) Journaling file system features number of index nodes Allocation Group size File system fragmentation addressable Journ

fileLog in to another virtual machine SSH s2 from one virtual machine, if it is SSH s2 ls ~ is to display a column of the appearance. If you performSSH s2 ls ~ | Xargs is to display a horizontal contentView cluster Status: Hadoop--config/soft/hadoop/etc/hadoop_cluster FS-LSR/Putting the file on the cluster is the Hadoop--config/soft/hadoop/etc/hadoop_cluster fs-put xxxxx followed by the location of the add-on path.View the process SSH S2 JPS. PS-AF is also the viewing process. The kill process

Gbase Database 8a 8a Cluster 8t 8m BI 8d 8 Analytic database Distributed Parallel Database Cluster High-End Transactional database High-speed Memory database Visual Business Intelligence Large Directory Service System Hard-Encrypted secure database Data analysis: 8a: A new type of columnstore database that supports rapid analysis of massive data. 8a cluste

are currently 4 Internet lines, each line of bandwidth is 12M, so the weight of the 4 Internet lines can be set to the same value (the default is 1, without modification); If 4 internet lines are 12M, 8M, 8M and 4M, the weights of 4 Internet lines can be modified to 3, 2, 2 and 1.Third,Pppoe-serverPppoe-server function is advantageous for renting landlord control network, prevent unauthorized computer to e

FDISK/DEV/SD[ABCD ...]--8e--PV-----(1), create a partitionFdisk/dev/sdbP--and P--and 1---and return-------------------Fdisk/dev/sdcP--and P--and 1---and return-------------------Fdisk/dev/sddP--and P--and 1---and return-------------------(2), create physical volume PVYou can see if there are physical volumes and their information through Pvscan# pvcreate-v/DEV/SDB1/DEV/SDC1/DEV/SDD1Set up physical volume for "/DEV/SDB1" with 817885152 available sectorsZeroing start of DEVICE/DEV/SDB1Writing phys

RHCE (REDHAT7)(iii)First, the configuration of soft RAID (MDADM)Mdadm system will be installed automatically, do not need additional installation# mdadm-c/dev/md1-a yes-l1-n2/dev/sdb1/dev/sdb2 ( note 1 is preceded by the letter L,1 represents raid1, 2 for 2 fast drives )View information:# mdadm-d/DEV/MD1generate the configuration file (otherwise, the server restarts the soft RAID is disabled):# Mdadm-ds >/etc/mdadm.conf# MKFS.XFS/DEV/MD1# MOUNT/DEV/MD1/AA (so it can be used, can be written into

xDSL, why is ADSL (a-asymmetric asymmetric, which is symmetrical to the upper and lower lines of the standard DSL) used by the telecom industry? Because of the needs of the telecommunications industry, ordinary people are most likely to download a lot of internet, upload very little, before the Web 2.0, upload is mainly TCP confirmation package bar. Why is the upstream speed slower than the downstream speed after changing the fiber? Fiber is the same as twisted pair, is the use of the

signal, but also need to tell the peripheral chip this is a read operation, rather than a write operation, which is achieved by reading the signal.Write a signalIn front of the reading signal, I think for the writing signal is not difficult to understand, this signal is used to tell the peripheral chip, which is a peripheral chip to write data operations.I/O portThe peripheral (chip) is mentioned earlier, now is the time to classify the peripherals. In general, there are two types of peripheral

voidClk_init (void){Clk_ickr|=0x01;//Enable internal high-speed clock HSICLK_CKDIVR|=0x08;//16M internal RC via 2, System clock is 8M while(! (clk_ickr0x02));//hsi ready .Clk_swr=0xe1;//HSI Primary Clock source}voidINIT_TIM2 (void) {TIM2_CCMR3 |=0X70;//Set timer 23-channel (PD2) output compare three modesTIM2_CCMR3 |=0x04;//Output comparison 3 pre-load enableTim2_ccer2 |=0x03;//Channel 3 Enable, low active, configured as output //Initialize the cloc

to do a comparison, should be replaced by actual data flow, compare unit flow price, that is the same "The engineer said. In fact, compared with access to the backbone of the traffic charges, network hardware construction and Resident Network service is the real reason for the impact of broadband access services, if these two contradictions do not solve, no matter how many competition subjects introduced, will also be the current results. Users still have multiple choices Still, operators are n

PHP configuration function is a few ini_* functions, mainly for the operation of the configuration file, in fact, four functions: Ini_get, Ini_set, Ini_get_all, Ini_restore. The most useful thing about personal feeling is ini_set and ini_get. * Ini_get (): Gets the option value of the configuration file This function believes that many people have, that is, to get the value of an option in the configuration file, if the value of True returns 1, if the value of False returns 0, the string returns

the maximum memory usage (specified in bytes or abbreviations, such as 8M). Although the best value is related to running applications, I recommend using the default value of 8M in most cases. The Memory_limit option will only take effect if PHP has specified enable-memory-limit mode compilation. A.10. Open_basedir The Open_basedir option restricts PHP from opening files only in the directory it specifies.

increasing the value of this variable to avoid PHP closing the script when the script is executing an important process. For linux hosts, the php. conf file may exist under/etc/httpd/conf. d/access. conf/. This file may solve the file size restrictions of some systems. Add the following code to the PHP Upload to temporarily enable PHP to upload large files: Check whether the preceding variables have been modified successfully: Modification in php. ini involves the size constraints of

affects the PHP upload file. PHP default post_max_size is 2M. If the POST data size is larger than post_max_size $_post and $_files superglobals will be empty. Find Post_max_size. Change to Post_max_size = 150M3, a lot of people will change the second step. However, PHP uploads a file with a maximum value of 8M. We're going to change one. Parameter upload_max_filesize indicates the maximum size of the uploaded file. Find Upload_max_filesize, default

still not solved, finally asked the master, the teacher Read said very strange, and then asked me Upload_max_ FileSize value changed, I said changed Ah, Master also can not solve. After a while, the teacher asked Post_max_size changed, I said that and upload it doesn't matter, master did not mind me, I still follow their own ideas continue to test, get a half day or not, finally tried the advice of the master, success, the original upload is and post_max_size have relations. Summary: The def

Apache Recently, the forum from the VBB2 upgrade to VBB3, the upload attachment size set to 2M, can upload more than 500K attachments will be error, and the previous use of VBB2 is normal.Carefully examine php.ini, where the upload_max_filesize=8m, without any problems, will then be one of the following: Max_execution_time = Max_input_time = 60memory_limit = 8M The values are adjusted to 120,

There is a MySQL server, dozens of new databases are added each day (30 or 40), up to now, there are nearly 3,000 databases. The number of accesses to a single database is small, but may be due to excessive amounts, and recently a frequent occurrence of PDO failed (discuz DB module) error. See the MySQL error log and find no useful hints. To ask, what are some of the things that should be considered for a problem like this? Listed below are some of the my.cnf content key_buffer_size = 32Mmax_al

; Fastcgi_buffer_size 64k; Fastcgi_buffers 4 64k; Fastcgi_busy_buffers_size 128k; Fastcgi_temp_file_write_size 128k; Fastcgi_cache TEST; Fastcgi_cache_valid 302 1h; Fastcgi_cache_valid 301 1d; Fastcgi_cache_valid any 1m; Server_names_hash_bucket_size 128; Client_header_buffer_size 32k; Large_client_header_buffers 4 32k; Client_max_body_size 8m; server {listen-default; server_name _; return 403; } include/usr/local/nginx/conf/vhosts/