Concurrent - Related information

• Some problems with Java: buffer line (cache line)

  there are some things I don t quite understand about buffer lines. 1 is cache row invalidation only for volatile, if it is not a volatile variable? 2 when you put it into practice, under what circumstances will the buffer line be populated? Do all cla...

  Java concurrent multithreaded

  Mar.02,2021
• Is the Barrier in Java: memory Barrier for single-thread operations or different thread operations?

  https: www.jianshu.com p 2ab. for example, this sentence LoadLoad Barrier: for such a statement, Load1; LoadLoad; Load2, ensures that the data to be read by Load1 is read before the data to be read by Load2 and subsequent read operations is accesse...

  Multithreaded java concurrent

  Mar.01,2021
• The thread pool of futuers in python3 is very efficient, but sometimes I wonder if it can be realized if it is a little slower, such as an interval of 0.5 between tasks.

  The question is written on the title, is there any way to be spaced by BAN, when it is applied too fast in crawlers? Or is it that there is no interval in this kind of concurrency? ...

  Thread-pool thread concurrent asynchronous-programming python3.x

  Feb.26,2021
MySQL Query : SELECT * FROM `codeshelper`.`v9_news` WHERE status=99 AND catid='6' ORDER BY rand() LIMIT 5
MySQL Error : Disk full (/tmp/#sql-temptable-64f5-36012a0-2b053.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
MySQL Errno : 1021
Message : Disk full (/tmp/#sql-temptable-64f5-36012a0-2b053.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
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