https://www.oraclescripts.com/tags/vpga_target_advice/Recent content in V$pga_target_advice on Oracle ScriptsHugo -- gohugo.ioenOracleScripts.comThu, 18 Jun 2026 00:00:00 +0000https://www.oraclescripts.com/post/oracle-pga-aggregate-target-vpgastat/Thu, 18 Jun 2026 00:00:00 +0000https://www.oraclescripts.com/post/oracle-pga-aggregate-target-vpgastat/ <h2 id="monitor-pga-aggregate-target-with-vpgastat-in-oracle">Monitor PGA Aggregate Target with V$PGASTAT in Oracle</h2> <h2 id="purpose">Purpose</h2> <p>Is <code>PGA_AGGREGATE_TARGET</code> set high enough for the work the instance actually does? <code>V$PGASTAT</code> answers that question. It is the instance-level statistics view for the Program Global Area (PGA), the private memory that server processes use for work areas. Oracle sizes those work areas for memory-intensive SQL operators such as sort, group-by, hash-join, bitmap merge and bitmap create. Where a per-process view such as <code>V$PROCESS</code> shows one process at a time, <code>V$PGASTAT</code> gives instance-wide numbers: the target you asked for, the bytes allocated now, the high-water mark, and the cache hit percentage that shows how well work areas run in memory.</p>