latch shared
ÈçºÎÀí½âMysqlÖеÄËø?
ÔÚÊý¾Ý¿âÖÐ×ÔȻҲ½«Ëø·Ö³ÉÁËÁ½Àà,Ò»Àà½ÐlatchÒ²¾ÍÊÇãÅËø,ÁíÒ»ÖÖ½Ðlock(Ëø)¡£ latchÒ»°ã³ÆΪãÅËø(ÇáÁ¿¼¶µÄËø),ÒòΪÆäÒªÇóËø¶¨µÄʱ¼ä±ØÐë·Ç³£...
½üÆÚÊý¾Ý¿â³öÏÖ¹²Ïí³ØËøµÈ´ý(latch: shared pool...
±ÜÃâflush shared pool ±ÜÃâshared pool reserved free listËéƬ
ʲôÊÇlatch?latchÓëlockµÄÇø±ð
˵Ã÷latchÕùÓñȽÏÑÏÖØrw-shared spin µÄ´ÎÊýrw-excl spinµÄ´ÎÊýlatchÕùÓ÷¢ÉúµÄÔÒò1¡¢ÄÚ´æ·ÃÎÊ̫Ƶ·±...
ÉîÈëÀí½âmutex¹¤×÷»úÖÆ
Óëshared latchÒ»Ñù¿ÉʹmutexÓÃcasģʽÉêÇëlatch. Òò´ËÒ²¿ÉÒÔ°Ñmutexµ±³ÉÒ»ÖÖshared latch, Ö»ÊÇÆäÁ£¶È¸üϸ£¬¸ü¼ÓÇáÁ¿¼¶¡£mutex²ÉÓÃs...
oracleÐÔÄܵ÷Õû¡ªÕï¶Ïlatch¾ºÕù
Ò»°ãÎÞÐèµ÷Õûlatch µ«ÊÇÏÂÁеĴëÊ©ÊÇÓÐÓÃµÄ A ¶Ô´¦ÓÚ¾ºÕùÖеÄlatch×ö½øÒ»²½µÄµ÷²é B Èç¹û¾ºÕùÖ÷Òª´æÔÚÓÚshared poolºÍlibrary...
latchËøÊÇ´æ·ÅÔÚsgaµÄÄĸö³ØÀïÃæ
2¡¢SGAÊǹ²ÏíµÄ£¬¼´µ±Óжà¸öÓû§Í¬Ê±µÇ¼ÁËÕâ¸öʵÀý£¬SGAÖеÄÐÅÏ¢¿ÉÒÔ±»ËüÃÇͬʱ·ÃÎÊ£¨µ±Éæ¼°µ½»¥³âµÄÎÊÌâʱ£¬ÓÉlatchºÍenquence...
JavaÖÐÓÐÄÄЩËø?
¡¾1¡¿¹«Æ½ËùºÍ·Ç¹«Æ½Ëù¡£¹«Æ½Ëø£ºÊÇÖ¸°´ÕÕÉêÇëËøµÄ˳ÐòÀ´»ñÈ¡Ëø£¬·Ç¹«Æ½Ëù£ºÏ̻߳ñÈ¡ËøµÄ˳Ðò²»Ò»¶¨...
ʲôÊÇLATCH ? ʲôÓÖµ¼ÖÂLATCH ¾ºÕù?
±íʾhard parse ¹ý¶à£» ½â¾ö£º 1¡¢°ó¶¨±äÁ¿ 2¡¢Êʵ±¼Ó´óshared pool 3¡¢¼Ó´ó_KGL_LATCH_COUNT ²ÎÊýLibrary cache pin latch:...
ÈçºÎÀí½â»¥³âËø¡¢Ìõ¼þËø¡¢¶ÁдËøÒÔ¼°×ÔÐýËø?
Ò»¡¢Ç°ÑÔ ½èÓÃJava²¢·¢±à³Ìʵ¼ùÖеĻ°¡±±àдÕýÈ·µÄ³ÌÐò²¢²»ÈÝÒ×£¬¶ø±àдÕý³£µÄ²¢·¢³ÌÐò¾Í¸üÄÑÁË¡±£¬Ïà±È...
oracle library cache ʲô×÷ÓÃ
ÄúºÃ£¬ÎÒÀ´ÎªÄú½â´ð£ºShared Pool LatchºÍLibrary Cache Latch¾ºÕù,ÕâÁ½¸öLatchÊÇShared Pool¹ÜÀíÖÐ×îÖØÒªÒ²ÊÇ×î³£¼ûµÄLatch¾ºÕù¡£Sh...