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 ...
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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...
The PGA308-Q1 contains seven OTP user memory banks. All seven of these banks may be independently programmed. However, the default bank at POR can be set only four times. The seven possible OTP user memory banks allow an end product with a microcontroller interface between the end-...
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...
For more information on I2C protocol, operation, avaialble commands and example communication refer to the PGA400-Q1 Programming Application Note (SLDA015). 6.20 Memory 6.20.1 OTP Memory The OTP Memory space is 8 kB and is located at memory pages 3 and 4. This memory space contains ...
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 ...