標籤

4GL (1) 人才發展 (10) 人物 (3) 太陽能 (4) 心理 (3) 心靈 (10) 文學 (31) 生活常識 (14) 光學 (1) 名句 (10) 即時通訊軟體 (2) 奇狐 (2) 爬蟲 (1) 音樂 (2) 產業 (5) 郭語錄 (3) 無聊 (3) 統計 (4) 新聞 (1) 經濟學 (1) 經營管理 (42) 解析度 (1) 遊戲 (5) 電學 (1) 網管 (10) 廣告 (1) 數學 (1) 機率 (1) 雜趣 (1) 證券 (4) 證券期貨 (1) ABAP (15) AD (1) agentflow (4) AJAX (1) Android (1) AnyChart (1) Apache (14) BASIS (4) BDL (1) C# (1) Church (1) CIE (1) CO (38) Converter (1) cron (1) CSS (23) DMS (1) DVD (1) Eclipse (1) English (1) excel (5) Exchange (4) Failover (1) Fedora (1) FI (57) File Transfer (1) Firefox (3) FM (2) fourjs (1) Genero (1) gladiatus (1) google (1) Google Maps API (2) grep (1) Grub (1) HR (2) html (23) HTS (8) IE (1) IE 8 (1) IIS (1) IMAP (3) Internet Explorer (1) java (4) JavaScript (22) jQuery (6) JSON (1) K3b (1) ldd (1) LED (3) Linux (117) Linux Mint (4) Load Balance (1) Microsoft (2) MIS (2) MM (51) MSSQL (1) MySQL (27) Network (1) NFS (1) Office (1) OpenSSL (1) Oracle (126) Outlook (3) PDF (6) Perl (60) PHP (33) PL/SQL (1) PL/SQL Developer (1) PM (3) Postfix (2) postfwd (1) PostgreSQL (1) PP (50) python (5) QM (1) Red Hat (4) Reporting Service (28) ruby (11) SAP (234) scp (1) SD (16) sed (1) Selenium (3) Selenium-WebDriver (5) shell (5) SQL (4) SQL server (8) sqlplus (1) SQuirreL SQL Client (1) SSH (2) SWOT (3) Symantec (2) T-SQL (7) Tera Term (2) tip (1) tiptop (24) Tomcat (6) Trouble Shooting (1) Tuning (5) Ubuntu (37) ufw (1) utf-8 (1) VIM (11) Virtual Machine (2) VirtualBox (1) vnc (3) Web Service (2) wget (1) Windows (19) Windows (1) WM (6) Xvfb (2) youtube (1) yum (2)

2011年8月22日 星期一

SQL Cache Hit Ratio

  • Pins - The number of times a pin was requested for objects of this namespace.
  • Reloads - Any pin of an object that is not the first pin performed since the object handle was created, and which requires loading the object from disk.

  • Hit Ratio should be > 85%


  • select sum(PINS) Pins,
    sum(RELOADS) Reloads,
    round((sum(PINS) - sum(RELOADS)) / sum(PINS) * 100,2) Hit_Ratio
    from v$librarycache

    沒有留言:

    張貼留言