(listenfd,10); maxfd=listenfd; Initializecounter=-1;for (i=0;iClient Core code:re-find work since, voted the first, yesterday to face, 9377, feel good, but feel oneself asking too high ~ ~ ~A fresh student, no service end of the work experience, only half a year of u3d internship experience, to 8K did, or too young, too little experience ah ~ ~, in fact 8K is only expected, low point is indifferent, 6k5 I
crontab-e XX * * */bin/bash/usr/local/webserver/nginx/sbin/cut_nginx_l og.sh #/sbin/service crond restart
Copy Code--------------nginx Configuring gzip compressionIn general, the compressed HTML, CSS, JS, PHP, jhtml and other files, the size can be reduced to the original 25%, that is, the original 100k of HTML, compressed only 25k left. This can undoubtedly save a lot of bandwidth, but also can reduce the load of the server.Configuring Gzip in Nginx is easierIn
;Default: proxy_buffer_size 4k|8k;Context: http, server, location//proxy_buffers 缓冲区Syntax: proxy_buffers number size;Default: proxy_buffers 8 4k|8k;Context: http, server, location6.Proxy proxy site commonly used optimization configuration is as follows, the configuration is written to a new file, called when using the include reference[[emailprotected] ~]# vim /etc/nginx/proxy_paramsproxy_set_header Host $
routine stress testing.Installation:
[root@linwaterbin ~]# yum install -y iozone
Parameter description:-L: Minimum number of processes-U: Maximum number of processes-R: Basic read/write unit, subject to the block size of the test objectFor example, if the Oracle block is set to 8 K, you can set it to 8 K.-S: It is consistent with the meaning of the S parameter of Bonnie ++.If this value is too small, the test results will be affected.Because many programs have run out of memory-F: cached files
source end and Terminal Matching resistance are both 75 ohm, as shown below:
Hsync and vsync synchronize row data without frame data, which is TTL level.
0.714 V is divided by the resistance pressure. As shown above, the parallel resistance on the left and the resistance on the right obtain 0 ~ The voltage range of 0.714 is shown as follows:
So I calculated the divider resistance as follows:
253.96 k | 1 k | 2 k | 4 k | 8 k | 16 K ≈ Ω
0.5k | 1 k | 2 k | 4 k | 8 K ≈ 258.06 Ω
(1) F
Nginx gzip Configuration parameter descriptionGzipDecide whether to open the Gzip module:Param:on|offExample:gzip on;Gzip_buffersSet the size of the gzip request memory to request memory space by a multiple of the block sizeParam1:intParam2:int (k) the rear unit is KExample:gzip_buffers 4 8k;Gzip_comp_levelSet the GZIP compression level, the lower the level of compression faster file compression than the smaller, whereas slower file compression than t
',--log file name@MaxMinutes =--Limit on time allowed to wrap log.@NewSize = 1-the size of the log file you want to set (M)
Setup/initializeDECLARE @OriginalSize intSELECT @OriginalSize = sizeFrom SysfilesWHERE name = @LogicalFileNameSELECT ' Original Size of ' + db_name () + ' LOG is ' +CONVERT (VARCHAR, @OriginalSize) + ' 8K pages or ' +CONVERT (VARCHAR (@OriginalSize *8/1024)) + ' MB 'From SysfilesWHERE name = @LogicalFileNameCREATE TABLE Dummytr
accepts for one client request at a time. This header includes not only the request-line, but also the general information header, the Request header field, and the length sum of the response header fields. This also limits the length of the URL to a considerable extent.
Nginx Server default limit is 4K or 8K, which is based on the hardware configuration of the server, usually the size of the memory page, the majority of the current is 4K, that is, 4
their products, user positioning, this hotspot can rub, occasion marketing is the common means of operators. The major news platform, the vertical platform of Internet information, Baidu Search and the list, micro-bo hot search, etc. are hot source, daily attention, great benefit.Finally,Re-disk summary, the above all the steps completed, not just finished, but to summarize, to sort out the applicable model, the fragmentation into a system, in order to better improve their ability. Operating co
let me in the office. Just tell me that we are outsourcing companies. ask me how long I have worked, I said 3 years, Android front and back are done. This man said we have a similar to you, now 8k can you accept it? I said I think about it! really shocking. Then I thought about it, I did not do the right thing is that I went to the company before the interview did not have some basic information about this company, leading to White run a trip! so th
stack top address of the kernel stack is given directly to the stacking pointer register.3. Implementation of kernel stacksKernel stacks are implemented differently in kernel-2.4 and kernel-2.6.Inside the kernel-2.4 kernel, the implementation of the kernel stack is:Union Task_union {Struct task_struct task;Unsigned long stack[init_stack_size/sizeof (long)];};Among them, the size of the init_stack_size can only be 8K.When the kernel allocates task_struct structures for each process, it actually
1 Kernel threadsThe kernel allocates 8K of stack space for each thread , with a struct thread_info structure at the top of each stack to hold thread-related information.There are several important variables:Preempt_count:This variable is divided into four parts0-7bit : Flag of whether the current process can be preempted8-15BIT:SOFTIRQ Enable Flag16-23BIT:HARDIRQ Enable Flag24bit:preempt_active flag bit ( atomic context flag bit??) )Task: process-rela
Rationale: Through analysis /proc/diskstats files to monitor the performance of the IO. The explanations are as follows:+++++++++++++++++++++++++++ 's explanation of/proc/diskstats ++++++++++++++++++++++++++++++++++++++++++++[email protected] bin]# cat/proc/diskstats | grep SDA | Head-18 0 SDA 73840 10263 3178156 91219 1110085 4192562 42423152 1275861 0 447798 1366379First to third domain, respectively, main device number, secondary device number, device name4th domain: The number of read times
]
Xcache.admin.enable_auth = On
; default administrator username, you can modify admin for other usernamexcache.admin.user = "admin"
; Run:echo-n "YourPassword" |md5sum |awk ' {print} ' to get MD5 password The following is the password, which is set at installation (MD5 encryption)
Xcache.admin.pass = "5ed1b644b258a5cc83"
[XCache]
Xcache.shm_scheme = "Mmap"
The
the min from testtable;
Max: = min + 10000;
For i in Min.. Max LOOP
INSERT into TestTable VALUES (i);
End LOOP;
return 0;
End;
$$ LANGUAGE Plpgsql;
CREATE FUNCTION
#4. Bulk INSERT data to test table (execute four times)
postgres=# SELECT Test_insert ();
Test_insert
-------------
0
(1 row)
#5. Confirm that the batch insert was successful four times.
postgres=# SELECT COUNT (*) from testtable;
Count
-------
40004
(1 row)
#6. Analyze the test table so that the statistics about
() are very similar. They are all used in structures similar to the following:
Python. ReadLines ()
Example
The code is as follows
Copy Code
FH = open (' C:\autoexec.bat ')For line in Fh.readlines ():Print Line
The difference between ReadLine () and. ReadLines () is that the latter reads the entire file at once, like. Read (). ReadLines () automatically analyzes the contents of the file into a list of rows that can be used by Python for ... Structure for
interface of the second IDE controller (the CD-ROM on this machine is connected to master of the second IDE controller).
(2) Power on the boot system, log in as root, run the following command to partition the hard disk:
#fdisk/dev/hdb
Divide all the hard drives into one primary partition and create a/DEV/HDB1 partition.
#fdisk/dev/hdd
Also, divide all the hard drives into one primary partition, creating a/DEV/HDD1 partition.
(3) After:
#/sbin/mdcreate RAID0-C4K/DEV/MD0/DEV/HDB1/DEV/HDD1
The content source of this page is from Internet, which doesn't represent Alibaba Cloud's opinion;
products and services mentioned on that page don't have any relationship with Alibaba Cloud. If the
content of the page makes you feel confusing, please write us an email, we will handle the problem
within 5 days after receiving your email.
If you find any instances of plagiarism from the community, please send an email to:
info-contact@alibabacloud.com
and provide relevant evidence. A staff member will contact you within 5 working days.