Oracle Scripts

Insert Control Characters in vi with Ctrl-V for Oracle Prompts Purpose A custom SQL*Plus prompt that prints the connected instance name in colour, or a login script that clears the screen before the banner, both need one thing the keyboard cannot type directly: a literal control character embedded in the file. Press …

Check RESUMABLE_TIMEOUT and RESUMABLE Status in V$SESSION Purpose V$SESSION carries two columns that tell you whether a session can survive running out of space: RESUMABLE and the resumable timeout that governs it. When resumable space allocation is enabled, a statement that hits a space error — a full tablespace, a …

Monitor PGA Aggregate Target with V$PGASTAT in Oracle Purpose Is PGA_AGGREGATE_TARGET set high enough for the work the instance actually does? V$PGASTAT answers that question. It is the instance-level statistics view for the Program Global Area — the private memory Oracle hands to each server process for sorting, …

Oracle Scheduler Job Monitoring with DBA_SCHEDULER_RUNNING_JOBS Purpose Which Oracle Scheduler jobs are executing at this instant, and how long has each been running? DBA_SCHEDULER_RUNNING_JOBS answers that directly. It lists only the jobs that are active right now — not the full job catalog, not the run history, just …

Oracle DBMS_SCHEDULER: Create and Manage Jobs with PL/SQL Purpose Automating a recurring task — a nightly statistics gather, a log purge, an end-of-month rollup — is a standard part of running an Oracle database. DBMS_SCHEDULER.CREATE_JOB is the procedure that registers that task with the database so it runs on a …

Query Wait Events by Session with Oracle V$SESSION_WAIT Purpose V$SESSION_WAIT is the real-time view that shows what each Oracle session is waiting on this very second. For every session it exposes the wait event name, how long the session has been in that wait, and three event-specific parameters (P1, P2, P3) that …

Oracle Index Rebuild and Coalesce with ALTER INDEX Purpose Over months of heavy delete and update activity, a B-tree index can accumulate empty and half-full leaf blocks. The index keeps working, but it grows wider than the data it points to, so range scans read more blocks than they need and the segment holds space …

Search UNIX Man Pages for Oracle DBA Tools with man -k Purpose Where Google answers most "how do I do X in UNIX" questions for a DBA today, man -k answers the narrower one — what tools the host actually has installed, and what each one does, without leaving the SSH session. Production Oracle hosts often run in …

Enable vi Command-Line Editing in ksh for Oracle DBA Shells Purpose Recalling and editing the prior command without retyping it is the single most-used operation in a long DBA shift on an Oracle host. On the Korn shell (ksh) — the default login shell on AIX 7.x, Solaris 11, HP-UX 11i, and many older Oracle 11g/12c …

Disable vi Autoindent Before Pasting SQL Scripts on Oracle Hosts Purpose Pasting a SQL script copied from email, a Confluence page, or a ticket comment into a vi buffer over SSH — and watching every line shift one indent right of the previous one — is the most common and most frustrating vi failure mode an Oracle DBA …