db2 performance tuning tips mainframe

) name:@"IdleNotification" object:nil]; NSNotification *notification = [NSNotification notificationWithName:@"IdleNotification" object:nil]; [[NSNotificationQueue defaultQueue] enqueueNotification:notification 　　postingStyle:NSPostWhenIdle];} Five, memory optimization Use Autorelease pool to reduce memory spikes Six, Code details optimization 1, not in the viewwillapear time-consuming operation 2. If the key code is more efficient with C/C + + Seven, picture optim

configuration. Linux is rich, powerful, and flexible, and you can do a variety of tasks with it, and in this article we'll discuss some tips for improving the performance of Linux servers.1. Tuning the Linux kernel elevator algorithm for disk I/OAfter selecting the file system, there are some kernel and mount options that may affect its

/how-to-drastically-improve-your-app-with-an-afternoon-and-instruments) There are some code that can be used to parse the ISO-8601 date string, and simply rewrite it to use it.Well, just use C to make it look good, but do you believe that we have a better plan!If you can control the date format you are working with, try to choose a Unix timestamp. You can easily convert from timestamp to NSDate: -(nsdate*return[NSDate datewithtimeintervalsince1970:timestamp];}This will be faster than using C

configuration.Linux is rich, powerful, and flexible, and you can do a variety of tasks with it, and in this article we'll discuss some tips for improving the performance of Linux servers.1. Tuning the Linux kernel elevator algorithm for disk I/OAfter selecting the file system, there are some kernel and mount options that may affect its

Tags: Practice login 16px between multiple connect shut down database SQL business logic　　The end of 2016 was the stage where I learned to understand the entire front end, backend, and database programming. During the practice programming process, notice that there is a scene between the server and the database: Start linking Database SQL--- $loginin =mysql_connect ("192.168.10.253:3306", "root", "123456"); To the end of the entire business logic, do not add a channel that closes the SQL linked

some code that can be used to parse the ISO-8601 date string, and simply rewrite it to use it.Well, just use C to make it look good, but do you believe that we have a better plan!If you can control the date format you are working with, try to choose a Unix timestamp. You can easily convert from timestamp to NSDate:-(nsdate*) Datefromunixtimestamp: (nstimeinterval) timestamp {return [nsdate Datewithtimeintervalsince1970:timestamp]; }This will be faster than using C to parse the date string!It is

add the following line to the boot auto mount in the/etc/fstab file: /dev/sdb1/ssd ext3 defaults00 Now we move MySQL to the new diskFirst stop the MySQL service: #service mysqld stop I suggest you?? Stop Apache/nginx at the same time to prevent any attempts to write to the database: #service httpd stop #service nginx stop Now copy the entire MySQL directory into the new partition: #cp/var/lib/mysql/ssd/-Rp This may take some time, depe

The simplest and most effective Bufferpool A buffer pool is a storage area in the memory. It is used to temporarily read and modify database pages (including table rows or index items ). The buffer pool is used to improve the performance of the database system. Accessing data from the memory is much faster than accessing data from the disk. Therefore, the fewer times the database manager needs to read or write data to the disk from the disk, the bette

Windows 2000 TCP Performance Tuning tips Carl HarrisCommunications Network servicesvirginia tech I was dismayed by the rather dismal TCP Performance in Win2000, especially for FTP up/downloads to distant sites, where the round-trip time (RTT) is nearly triple-digit. being a Unix bigot of sorts, I also found it amusing