{"id":1103,"date":"2012-08-13T23:50:45","date_gmt":"2012-08-13T15:50:45","guid":{"rendered":"https:\/\/yangtingkun.net\/?p=1103"},"modified":"2012-09-02T23:53:13","modified_gmt":"2012-09-02T15:53:13","slug":"11g%e6%96%b0%e5%a2%9eflash-cache%e5%8a%9f%e8%83%bd","status":"publish","type":"post","link":"https:\/\/yangtingkun.net\/?p=1103","title":{"rendered":"11g\u65b0\u589eFLASH CACHE\u529f\u80fd"},"content":{"rendered":"<p>\u572811.2\u4e2d\uff0cOracle\u63d0\u4f9b\u4e86\u8bbe\u7f6eFLASH CACHE\u7684\u529f\u80fd\uff0c\u4f7f\u5f97\u6570\u636e\u5e93\u53ef\u4ee5\u81ea\u52a8\u4f7f\u7528\u914d\u7f6e\u597d\u7684FLASH CACHE\u4f5c\u4e3a\u4e8c\u7ea7\u7f13\u5b58\u3002<br \/>\n\u8fd9\u4e2a\u529f\u80fd\u5176\u5b9e\u662fEXADATA\u5f15\u5165\u7684\uff0c\u8fd9\u4e5f\u662fEXADATA\u63d0\u9ad8IO\u6027\u80fd\u7684\u53c8\u4e00\u5229\u5668\u3002\u4e0d\u8fc7\u5373\u4f7f\u4e0d\u662fEXADATA\uff0c\u572811.2\u4e2d\u4e5f\u53ef\u4ee5\u8bbe\u7f6e\u8be5\u529f\u80fd\uff0c\u4e14\u8fd9\u4e2a\u529f\u80fd\u7684\u8bbe\u7f6e\u5e76\u4e0d\u590d\u6742\u3002<br \/>\n11.2\u4e2d\u63d0\u4f9b\u4e86\u4e24\u4e2a\u53c2\u6570\u6765\u8bbe\u7f6eFLASH CACHE\uff1a<\/p>\n<pre lang='SQL'>SQL> show parameter flash_cache\r\nNAME                                 TYPE        VALUE\r\n------------------------------------ ----------- ------------------------------\r\ndb_flash_cache_file                  string\r\ndb_flash_cache_size                  big integer 0<\/pre>\n<p>\u5176\u4e2dDB_FLASH_CACHE_SIZE\u7528\u6765\u8bbe\u7f6eFLASH CACHE\u7684\u5927\u5c0f\uff0c\u800cDB_FLASH_CACHE_FILE\u8bbe\u7f6e\u6587\u4ef6\u7684\u4f4d\u7f6e\u3002<br \/>\n\u5728\u64cd\u4f5c\u7cfb\u7edf\u4e0a\u5c06FLASH CACHE\u6302\u6210\u88f8\u8bbe\u5907\uff0c\u7136\u540e\u6dfb\u52a0\u5230\u5355\u72ec\u7684ASM\u78c1\u76d8\u7ec4\u4e2d\u6216\u76f4\u63a5\u6302\u8f7d\u5230\u64cd\u4f5c\u7cfb\u7edf\u4e0a\uff0c\u7136\u540e\u901a\u8fc7DB_FLASH_CACHE_FILE\u6307\u5b9aASM\u6216\u64cd\u4f5c\u7cfb\u7edf\u76ee\u5f55\u4e0b\u7684\u6587\u4ef6\u65e2\u53ef\u3002<br \/>\n\u9700\u8981\u6ce8\u610f\u7684\u662f\uff0cDB_FLASH_CACHE_FILE\u4e0d\u50cf\u5176\u4ed6\u53c2\u6570\u4e00\u6837\uff0c\u5bf9\u4e8eASM\u53ea\u9700\u8981\u6307\u5b9a\u78c1\u76d8\u7ec4\u7684\u540d\u79f0\u65e2\u53ef\uff0c\u800c\u5fc5\u987b\u901a\u8fc7\u624b\u5de5\u7684\u65b9\u5f0f\u5728ASM\u78c1\u76d8\u7ec4\u4e0a\u5efa\u7acb\u5bf9\u5e94\u7684\u76ee\u5f55\uff0c\u5728\u8bbe\u7f6e\u53c2\u6570\u7684\u8fc7\u7a0b\u4e2d\uff0c\u76ee\u5f55\u5e76\u4e0d\u4f1a\u81ea\u52a8\u521b\u5efa\uff0c\u4e0d\u8fc7\u6307\u5b9a\u7684\u6587\u4ef6\u540d\u5e76\u4e0d\u9700\u8981\u5b58\u5728\uff0cOracle\u4f1a\u6839\u636eDB_FLASH_CACHE_SIZE\u7684\u5927\u5c0f\u81ea\u52a8\u521b\u5efa\u6587\u4ef6\u3002<\/p>\n<pre lang='SQL'>SQL> alter system set db_flash_cache_size = 30g scope = spfile;\r\nSystem altered.\r\nSQL> alter system set db_flash_cache_file = '+REDO\/flash\/odademo1.flash' scope = spfile sid = 'odaenmo1';\r\nSystem altered.\r\nSQL> alter system set db_flash_cache_file = '+REDO\/flash\/odademo2.flash' scope = spfile sid = 'odaenmo2';\r\nSystem altered.<\/pre>\n<p>\u9700\u8981\u6ce8\u610f\uff0c\u5bf9\u4e8eRAC\u800c\u8a00\uff0c\u5404\u4e2a\u8282\u70b9\u4f7f\u7528\u72ec\u7acb\u7684FLASH CACHE\u6587\u4ef6\uff0c\u56e0\u6b64\u9700\u8981\u5355\u72ec\u8bbe\u7f6e\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u572811.2\u4e2d\uff0cOracle\u63d0\u4f9b\u4e86\u8bbe\u7f6eFLASH CACHE\u7684\u529f\u80fd\uff0c\u4f7f\u5f97\u6570\u636e\u5e93\u53ef\u4ee5\u81ea\u52a8\u4f7f\u7528\u914d\u7f6e\u597d\u7684FLASH CACHE\u4f5c\u4e3a\u4e8c\u7ea7\u7f13\u5b58\u3002 \u8fd9\u4e2a\u529f\u80fd\u5176\u5b9e\u662fEXADATA\u5f15\u5165\u7684\uff0c\u8fd9\u4e5f\u662fEXADATA\u63d0\u9ad8IO\u6027\u80fd\u7684\u53c8\u4e00\u5229\u5668\u3002\u4e0d\u8fc7\u5373\u4f7f\u4e0d\u662fEXADATA\uff0c\u572811.2\u4e2d\u4e5f\u53ef\u4ee5\u8bbe\u7f6e\u8be5\u529f\u80fd\uff0c\u4e14\u8fd9\u4e2a\u529f\u80fd\u7684\u8bbe\u7f6e\u5e76\u4e0d\u590d\u6742\u3002 11.2\u4e2d\u63d0\u4f9b\u4e86\u4e24\u4e2a\u53c2\u6570\u6765\u8bbe\u7f6eFLASH CACHE\uff1a SQL> show parameter flash_cache NAME TYPE VALUE &#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212; &#8212;&#8212;&#8212;&#8211; &#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212; db_flash_cache_file string db_flash_cache_size big integer 0 \u5176\u4e2dDB_FLASH_CACHE_SIZE\u7528\u6765\u8bbe\u7f6eFLASH CACHE\u7684\u5927\u5c0f\uff0c\u800cDB_FLASH_CACHE_FILE\u8bbe\u7f6e\u6587\u4ef6\u7684\u4f4d\u7f6e\u3002 \u5728\u64cd\u4f5c\u7cfb\u7edf\u4e0a\u5c06FLASH CACHE\u6302\u6210\u88f8\u8bbe\u5907\uff0c\u7136\u540e\u6dfb\u52a0\u5230\u5355\u72ec\u7684ASM\u78c1\u76d8\u7ec4\u4e2d\u6216\u76f4\u63a5\u6302\u8f7d\u5230\u64cd\u4f5c\u7cfb\u7edf\u4e0a\uff0c\u7136\u540e\u901a\u8fc7DB_FLASH_CACHE_FILE\u6307\u5b9aASM\u6216\u64cd\u4f5c\u7cfb\u7edf\u76ee\u5f55\u4e0b\u7684\u6587\u4ef6\u65e2\u53ef\u3002 \u9700\u8981\u6ce8\u610f\u7684\u662f\uff0cDB_FLASH_CACHE_FILE\u4e0d\u50cf\u5176\u4ed6\u53c2\u6570\u4e00\u6837\uff0c\u5bf9\u4e8eASM\u53ea\u9700\u8981\u6307\u5b9a\u78c1\u76d8\u7ec4\u7684\u540d\u79f0\u65e2\u53ef\uff0c\u800c\u5fc5\u987b\u901a\u8fc7\u624b\u5de5\u7684\u65b9\u5f0f\u5728ASM\u78c1\u76d8\u7ec4\u4e0a\u5efa\u7acb\u5bf9\u5e94\u7684\u76ee\u5f55\uff0c\u5728\u8bbe\u7f6e\u53c2\u6570\u7684\u8fc7\u7a0b\u4e2d\uff0c\u76ee\u5f55\u5e76\u4e0d\u4f1a\u81ea\u52a8\u521b\u5efa\uff0c\u4e0d\u8fc7\u6307\u5b9a\u7684\u6587\u4ef6\u540d\u5e76\u4e0d\u9700\u8981\u5b58\u5728\uff0cOracle\u4f1a\u6839\u636eDB_FLASH_CACHE_SIZE\u7684\u5927\u5c0f\u81ea\u52a8\u521b\u5efa\u6587\u4ef6\u3002 SQL> alter system set db_flash_cache_size = 30g scope = spfile; System altered. SQL> &hellip; <a href=\"https:\/\/yangtingkun.net\/?p=1103\">Continue reading <span class=\"meta-nav\">&rarr;<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_jetpack_newsletter_access":"","_jetpack_dont_email_post_to_subs":false,"_jetpack_newsletter_tier_id":0,"_jetpack_memberships_contains_paywalled_content":false,"_jetpack_memberships_contains_paid_content":false,"footnotes":""},"categories":[3],"tags":[953,954,952,180],"jetpack_featured_media_url":"","jetpack_sharing_enabled":true,"jetpack_shortlink":"https:\/\/wp.me\/p2yiY3-hN","_links":{"self":[{"href":"https:\/\/yangtingkun.net\/index.php?rest_route=\/wp\/v2\/posts\/1103"}],"collection":[{"href":"https:\/\/yangtingkun.net\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/yangtingkun.net\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/yangtingkun.net\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/yangtingkun.net\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=1103"}],"version-history":[{"count":1,"href":"https:\/\/yangtingkun.net\/index.php?rest_route=\/wp\/v2\/posts\/1103\/revisions"}],"predecessor-version":[{"id":1104,"href":"https:\/\/yangtingkun.net\/index.php?rest_route=\/wp\/v2\/posts\/1103\/revisions\/1104"}],"wp:attachment":[{"href":"https:\/\/yangtingkun.net\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=1103"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/yangtingkun.net\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=1103"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/yangtingkun.net\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=1103"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}