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  • On the problem that 32-bit operating system can support up to 4G memory

    on this question, I understand it like this: 1 to be exact, 32-bit CPU should support up to 4G memory because 32-bit CPU has 32 address buses, each line 0 or 1, a total of 2 ^ 32 possibilities, 2 ^ 32 memory addresses, each memory address corresponds t...

  • 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-64f5-1bdc3ab-46322.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
    MySQL Errno : 1021
    Message : Disk full (/tmp/#sql-temptable-64f5-1bdc3ab-46322.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
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