12.2 wait event ‘PGA memory operation’ 一客户报整个数据库sql运行缓慢,甚至执行不出来。 看了下会话,等待事件都是PGA memory operation,等待时间长达几百秒。 PGA memory operation等待事件在12.2开始引入,从字面上看是会话内存分配。 具体看了下等待事件原理。是在等待系统分配内存过程。理论上,一进程分配内存...
Oracle Database - Enterprise Edition - Version 18.0.0.0 and later: SQL's waiting on PGA Memory Operation Wait Event after upgrade to 18c from 11g
简介: PGA memory operation The probable cause, if there was adequate PGA memory available, is that the Instance was CPU bound meaning it was waiting for the cpu to be able to address and allocate the memory. This would be an explanation for the ' PGA memory operation ' wait event. ...
WAIT #2177686296376: nam='PGA memory operation' ela= 32 p1=65536 p2=1 p3=0 obj#=-1 tim=3536775238798 WAIT #2177686296376: nam='PGA memory operation' ela= 12 p1=65536 p2=1 p3=0 obj#=-1 tim=3536775246162 WAIT #2177686296376: nam='PGA memory operation' ela= 23 p1=65536 p2=1 p3=0 ...
fritshoogland 大神ORACLE :pga-memory-operation latch https://fritshoogland.wordpress.com/2017/03/01/oracle-12-2-wait-event-pga-memory-operation/#comment-5838 https://fritshoogland.wordpress.com/2015/07/17/oracle-12-and-latches/ https://andreynikolaev.wordpress.com/...
2.2.4 Memory CRC Calculation (Optional) The PGA460-Q1 implements a cyclic redundancy check (CRC) that is a self-contained algorithm to verify the integrity of the EEPROM stored data and threshold settings. When an EEPROM program or EEPROM-reload operation is executed, or when a threshold ...
Transducer Temperature Decoupling 7.3.10 Memory CRC Calculation The PGA460 implements a cyclic redundancy check (CRC) that is a self-contained algorithm to verify the integrity of the EEPROM stored data and threshold settings. When an EEPROM program or EEPROM-reload operation is executed, or when ...
48KB SRAM, 4 ADCs, 2 DAC ch., 7 comp., 4 PGA, timers, 1.8 V Datasheet - production data Features • Core: ARM® Cortex®-M4 32-bit CPU with FPU (72 MHz max), single-cycle multiplication and HW division, 90 DMIPS (from CCM), DSP instruction and MPU (memory protection unit...
up to 256KB Flash+48KB SRAM 4 ADCs, 2 DACs, 7 comp., 4 PGA, timers, 1.8 V operation Data brief Features ■ Core: ARM® 32-bit Cortex™-M4F CPU (72 MHz max), single-cycle multiplication and HW division, DSP instruction with FPU (floating-point unit) and MPU (memory protection...
The SRAM can be accessed (read/write) at CPU clock speed with 0 wait states. 2.3 Embedded Flash memory Up to 128 KB of embedded Flash memory is available for storing programs and data. 2.4 Nested vectored interrupt controller (NVIC) The SPD1188 embeds a nested vectored interrupt controller ...