J9ÕæÈË

¡°¸É±ÆÈí¼þ¡±µÄ½ø½×ʹÓü¼ÇÉÓëϵͳ¼¶ÓÅ»¯
À´Ô´£ºÖ¤È¯Ê±±¨Íø×÷Õߣº³ÂÊçÕê2026-03-29 11:16:47
xxyewiurgbwkjesbdfgjhkbwe

2.²Ù×÷ϵͳÓÅ»¯

Äں˼¶Çý¶¯³ÌÐò£º¹ØÓÚÐèÒª¼«¸ßÐÔÄܵÄÓ¦Óà £¬¿ÉÒÔ¿ª·¢Äں˼¶Çý¶¯³ÌÐò £¬Ö±½ÓÓëÓ²¼þ½»»¥ £¬¼õÉÙÖмä²ãµÄ¿ªÏú¡£ÀýÈç £¬¸ßÐÔÄÜÍøÂçÉ豸»òÕßʵʱϵͳÖÐ £¬Äں˼¶Çý¶¯ÄÜÏÔÖøÌá¸ßÐÔÄÜ¡£

ÄÚºËÇÀÕ¼£ºÔÚʵʱϵͳÖÐ £¬ÄÚºËÇÀÕ¼£¨kernelpreemption£©¼¼Êõ¿ÉÒÔÈ·±£¸ßÓÅÏȼ¶ÈÎÎñÄÜʵʱÏìÓ¦ £¬¼õÉÙϵͳµÄÇÀÕ¼ÑÓ³Ù¡£

Äں˹²Ïí£ºÔÚ¶àºËϵͳÖÐ £¬Í¨¹ýºÏÀí·ÖÅɺ͹²ÏíÄÚºË×ÊÔ´ £¬¿ÉÒÔ³ä·ÖÀûÓöàºËµÄ²¢ÐÐÅÌËãÄÜÁ¦¡£ÀýÈç £¬Ê¹Óù²ÏíÄڴ棨sharedmemory£©À´¼õÉÙͬ²½¿ªÏú¡£

1.Ó²¼þÓëÈí¼þЭͬÓÅ»¯

CPU»º´æÓÅ»¯£ºÔÚ³ÌÐòÉè¼ÆÖÐ £¬¾¡Á¿¼õÉÙCPU»º´æÊ§Ð§£¨cachemiss£© £¬Í¨¹ýºÏÀíµÄÊý¾Ý½á¹¹ºÍ»á¼ûģʽÀ´Ìá¸ß»º´æÃüÖÐÂÊ¡£

ÄÚ´æ´ø¿íÓëÑÓ³Ù£ºÓÅ»¯ÄÚ´æ»á¼ûµÄ·½·¨ £¬¼õÉÙÄÚ´æ´ø¿íµÄÀ˷ѺÍÑÓ³Ù¡£ÀýÈç £¬Ê¹ÓÃ¶ÔÆëÄڴ棨alignedmemory£©À´Ìá¸ß»á¼ûËÙ¶È¡£

Ö¸Áî¼¶²¢ÐУºÀûÓÃCPUµÄ³¬±êÁ¿£¨superscalar£©ºÍ³¬Á÷Ë®Ïߣ¨superpipeline£©¼Ü¹¹ £¬Í¨¹ýÖ¸Áî¼¶²¢ÐУ¨instruction-levelparallelism£©À´Ìá¸ßÖ´ÐÐЧÂÊ¡£

3.ÄÚ´æÖÎÀí

¼õÉÙÄÚ´æ·ÖÅÉ£ºÆµ·±µÄÄÚ´æ·ÖÅɺÍÊͷŻᵼÖ´ó×ڵĿªÏú £¬¾¡Á¿¼õÉÙÄÚ´æ?·ÖÅɵįµÂÊ¡£¿ÉÒÔʹÓÃÄÚ´æ³Ø£¨memorypool£©À´Öظ´Ê¹ÓÃÄÚ´æ¡£

ÖÆÖ¹ÄÚ´æÐ¹Â©£ºÔÚ¿ª·¢Àú³ÌÖÐ £¬ÒªÌرð×¢ÒâÄÚ´æÐ¹Â©µÄÎÊÌâ¡£°´ÆÚ½øÐÐÄÚ´æ¼ì²éºÍÆÊÎö £¬ÊµÊ±ÐÞ¸´ÄÚ´æÐ¹Â©¡£

ʹÓÃÖÇÄÜÖ¸Õ룺ÔÚC++ÖÐ £¬Ê¹ÓÃÖÇÄÜÖ¸Õ루Èçstd::shared_ptrºÍstd::unique_ptr£©¿ÉÒÔ×Ô¶¯ÖÎÀíÄÚ´æ £¬ÖÆÖ¹ÊÖ¶¯ÊÍ·ÅÄÚ´æ´øÀ´µÄÂé·³¡£

Áù¡¢½áÂÛ

ÔÚÐÅϢʱ´ú £¬¸ßЧÂʺ͸ßÐÔÄܵġ°¸É±ÆÈí¼þ¡±ÒѳÉ?Ϊÿ¸öרҵÈËÊ¿ºÍÍŶӵıر¸¹¤¾ß¡£Í¨¹ýÉîÈëѧϰÈí¼þµÄ¸ß¼¶¹¦Ð§ £¬×Ô½ç˵ÉèÖÃÓë½Å±¾±àд £¬ÒÔ¼°ÏµÍ³¼¶µÄÓÅ»¯ £¬Äú¿ÉÒÔ´ó´óÌáÉýÊÂÇéºÍÉú»îµÄЧÂÊ £¬ÊµÏÖ¼«ÖÂЧÄÜ¡£

ÎÞÂÛÄúÊÇÒ»¸öÈ˵ÄÊÂÇéÕß £¬ÕÕ¾ÉÒ»¸öÍŶӵijÉÔ± £¬ÕâЩ¼¼ÇɺÍÒªÁì¶¼½«ÎªÄú´øÀ´¾Þ´óµÄ×ÊÖú¡£Ï£Íû±¾?ÎÄÄܹ»ÎªÄúÌṩÓмÛÖµµÄÐÅÏ¢ £¬ÖúÄúÔڿƼ¼Éú³¤µÄÀ˳±ÖÐÍÑÓ±¶ø³ö £¬³ÉΪÐÐÒµÖеĶ¥¼âÈ˲Å¡£

ÔÚδÀ´µÄÊÂÇéºÍÉú»îÖÐ £¬¼ÌÐøÌ½Ë÷ºÍÓÅ»¯ £¬ÄúÒ»¶¨»á·¢Ã÷¸ü¶à¡°¸É±ÆÈí¼þ¡±µÄDZÁ¦ £¬²¢ÔÚ¸ßЧÂʺ͸ßÐÔÄܵÄÃÅ·Éϲ»¾øÇ°½ø¡£

Ï£ÍûÕâÆªÏêϸµÄÈíÎÄÄܹ»×ÊÖúÄú¸üºÃµØÓß½âºÍÀûÓ᰸ɱÆÈí¼þ¡± £¬ÌáÉý¸öÈ˺ÍÍŶӵľºÕùÁ¦¡£Èç¹ûÄúÓÐÈκÎÎÊÌâ»òÐèÒª½øÒ»²½µÄ?Ö¸µ¼ £¬½Ó´ýËæÊ±ÁªÏµJ9ÕæÈË¡£

3.Êý¾Ý¿âÓÅ»¯

Ë÷ÒýÓÅ»¯£ººÏÀíµÄË÷ÒýÉè¼Æ¿ÉÒÔ´ó?·ùÌáÉýÅÌÎÊËÙ¶È¡£ÀýÈç £¬ÔÚSQLÊý¾Ý¿âÖÐ £¬¿ÉÒÔͨ¹ýÌí¼ÓË÷ÒýÀ´¼ÓËÙÅÌÎÊ¡£

CREATEINDEXidx_nameONusers(name);

·ÖÇø±í£º¹ØÓÚ´óÐÍÊý¾Ý¿â £¬¿ÉÒÔ½«±í½øÐзÖÇø £¬ÒÔÌá¸ßÅÌÎÊÐÔÄܺÍÖÎÀíЧÂÊ¡£

CREATETABLEorders_2023(idINT,order_dateDATE,amountDECIMAL(10,2))PARTITIONBYRANGE(YEAR(order_date))(PARTITIONp0VALUESLESSTHAN(2023),PARTITIONp1VALUESLESSTHAN(2024));

ʲôÊÇ¡°¸É±ÆÈí¼þ¡±£¿

¡°¸É±ÆÈí¼þ¡±ÊÇÖ¸ÄÇЩ²»µ«¹¦Ð§Ç¿´ó £¬²¢ÇÒÄܹ»ÔÚ¶Ìʱ¼äÄÚÍê³É´ó×ÚÅÓ´óÈÎÎñµÄÈí¼þ¡£ÕâЩÈí¼þÍùÍùÊǾ­¹ý¾«ÐÄÉè¼ÆºÍÓÅ»¯µÄ £¬Äܹ»ÔÚ¸÷¸öÁìÓòÖз¢»ÓÖØÒª×÷Óá£ÀýÈç £¬ÔÚ±à³Ì?ÁìÓò £¬IDE£¨¼¯³É¿ª·¢Çé¿ö£©ÈçVisualStudioCodeºÍJetBrainsϵÁУ»ÔÚÊý¾ÝÆÊÎöÁìÓò £¬¹¤¾ßÈçExcelºÍTableau£»ÔÚÏîÄ¿ÖÎÀíÁìÓò £¬¹¤¾ßÈçTrelloºÍAsana¡£

1.´úÂë½á¹¹ÓÅ»¯

Ä£¿é»¯Éè¼Æ£º½«´úÂëÆÊÎö³É?¶à¸ö¶ÀÁ¢µÄÄ£¿é £¬Ã¿¸öÄ£¿é¾ßÓÐÌØ¶¨µÄ¹¦Ð§ £¬±ãÓÚÖÎÀíºÍά»¤¡£Ä£¿é»¯Éè¼ÆÒ²ÄÜÌá¸ß´úÂëµÄ¸´ÓÃÐԺͲâÊÔЧÂÊ¡£

ʹÓÃÉè¼ÆÄ£Ê½£ºÉè¼ÆÄ£Ê½ÊǾ­¹ýÖØ¸´ÑéÖ¤µÄ×î¼Ñʵ¼ù £¬ËüÄÜ×ÊÖúÄã½â¾ö³£¼ûµÄÉè¼ÆÎÊÌâ¡£ÀýÈç £¬Ê¹Óõ¥ÀýģʽÀ´¿ØÖƶÔijһ×ÊÔ´µÄ»á¼û £¬»òÕßʹÓù¤³§Ä£Ê½À´ÖÎÀí¹¤¾ßµÄ´´Á¢¡£

¼ò»¯Âß¼­£ºÖÆÖ¹ÅÓ´óµÄÌõ¼þÓï¾äºÍǶÌ×µÄÑ­»· £¬¾¡Á¿Ê¹Óüò½àÃ÷Á˵ĴúÂë¡£ÅÓ´óµÄÂß¼­²»µ«ÄÑÒÔÀí½â £¬»¹»á½µµÍ´úÂëµÄÖ´ÐÐЧÂÊ¡£

ÔðÈα༭£º ³ÂÊçÕê
ÉùÃ÷£ºÖ¤È¯Ê±±¨Á¦ÇóÐÅÏ¢ÕæÊµ¡¢×¼È· £¬ÎÄÕÂÌá¼°ÄÚÈݽö¹©²Î¿¼ £¬²»×é³ÉʵÖÊÐÔͶ×ʽ¨Òé £¬¾Ý´Ë²Ù×÷Σº¦×Ôµ£
ÏÂÔØ¡°Ö¤È¯Ê±±¨¡±¹Ù·½APP £¬»ò¹Ø×¢¹Ù·½Î¢ÐÅÃñÖںŠ£¬¼´¿ÉËæÊ±Á˽â¹ÉÊж¯Ì¬ £¬¶´²ìÕþ²ßÐÅÏ¢ £¬ÕÆÎղƲúʱ»ú¡£
ÍøÓÑÆÀÂÛ
µÇ¼ºó¿ÉÒÔ̸»°
·¢ËÍ
ÍøÓÑÆÀÂÛ½ö¹©Æä±í´ï¸öÈË¿´·¨ £¬²¢²»±êÃ÷֤ȯʱ±¨Á¢³¡
ÔÝÎÞÆÀÂÛ
ΪÄãÍÆ¼ö
³Ï,ÒæÍ¨£¨300430£©2025ÄêÖб¨¼òÎö£º¾»ÀûÈóͬ±ÈϽµ38.76%£¬Èý·ÑÕ¼±ÈÉÏÉýÃ÷ÏÔ
ÍøÕ¾µØÍ¼