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. ...
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MID POWER 30 GAIN = 1, FULL POWER GAIN = 8, LOW POWER GAIN = 8, MID POWER GAIN = 8, FULL POWER 25 GAIN = 16, LOW POWER GAIN = 16, MID POWER GAIN = 16, FULL POWER 20 15 10 5 0 0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.0 WAIT TIME IN STANDBY MODE (Seconds) 図 62....
This reduces the number of threads needed in the application, since there isn't any need for threads to wait for the database to produce results. This in turn reduces memory footprint and the amount of context switching needed. Structural improvements over JDBC ...
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The Flash memory access time is adjusted to the CPU clock frequency (0 wait state from 0 to 24 MHz, 1 wait state from 24 to 48 MHz and 2 wait states above). 3.4 Embedded SRAM STM32F358xC devices feature up to 48 Kbytes of embedded SRAM with hardware parity 12/134 DocID025540 Rev...
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 ...