摘要：胆固醇概述胆固醇在血液中以脂蛋白的形式存在。胆固醇广泛存在于动物体内，尤以脑及神经组织中最为丰富，在肾、脾、皮肤、肝和胆汁中含量也高。其溶解性与脂肪类似，不溶于水，易溶于乙醚、氯仿等溶剂。胆固醇是动物组织细胞所不可缺少的重要物质，它不仅参与形成细胞膜，而且是合成胆汁酸，维生素D以及甾体激素的原料。胆固醇主要来自人体自身的合成，食物中的胆固醇是次要补充。如一个70kg体重的成年人，体内大约有胆固醇140g，每日大约更新1g，其中4/5在体内代谢产生，只有1/5需从食物补充，每人每日从食物中摄取胆固醇200mg，即可满足身体需要。胆固醇的吸收率只有30%，随着食物胆固醇含量的增加，吸收率还要下降， 阅读全文

摘要：Data Recovery AdvisorThe health monitor and the ADRThe capabilities and limitations of DRAusing the DRAComplete recovery from data file loss with RMANRecovery in noarchive log modeRecovery in archive log modeRecovery from loss of noncritical filesRecovery from loss of critical filesIncomplete recove 阅读全文

摘要：One database was down today. So I login the server try to check and fix it. I found the Oracle home do not exist. So I check the /etc/fstab and found below.[root@aaaa~]# cat /etc/fstab# This file is edited by fstab-sync - see 'man fstab-sync' for detailsLABEL=/ / ... 阅读全文