https://www.oraclescripts.com/tags/redo-log-sizing/Recent content in Redo Log Sizing on Oracle ScriptsHugo -- gohugo.ioenOracleScripts.comSun, 12 Jul 2026 00:00:00 +0000https://www.oraclescripts.com/post/oracle-redo-log-switch-frequency-vlog-history/Sun, 12 Jul 2026 00:00:00 +0000https://www.oraclescripts.com/post/oracle-redo-log-switch-frequency-vlog-history/ <h2 id="check-redo-log-switch-frequency-with-vlog_history">Check Redo Log Switch Frequency with V$LOG_HISTORY</h2> <h2 id="purpose">Purpose</h2> <p>How many times does the online redo log switch in a single hour, and does that number spike during the nightly batch window or stay flat around the clock? A redo log sizing decision made from a single &quot;switches per day&quot; total hides the answer to that question. A database averaging twelve switches a day could be switching once an hour evenly, or it could be sitting idle for twenty hours and then switching ten times in a two-hour ETL run. Those two patterns call for different log file sizes, and only an hourly breakdown tells them apart.</p>