在 oracle 12.1.0.2 上大量交换

Question

我收到以下错误。我的数据库版本是 "Oracle Database 12c Enterprise Edition Release 12.1.0.2.0 - 64bit Production"，我已经查看了文档 ID 1919850.1。我想知道有没有办法避免交换

WARNING: Heavy swapping observed on system in last 5 mins. pct of
memory swapped in [1.80%] pct of memory swapped out [3.26%]. Please
make sure there is no memory pressure and the SGA and PGA are
configured correctly. Look at DBRM trace file for more details. Errors
in file /oradb/oracle/diag/rdbms/PROD/PROD/trace/PROD_dbrm_7340532.trc
(incident=16875): ORA-00700: soft internal error, arguments:
[kskvmstatact: excessive swapping observed], [], [], [], [], [], [],
[], [], [], [], [] Incident details in:
/oradb/oracle/diag/rdbms/PROD/PROD/incident/incdir_16875/PROD_dbrm_7340532_i16875.trc
Tue Jun 16 09:41:47 2015 Dumping diagnostic data in
directory=[cdmp_20150616094147], requested by (instance=1,
osid=20120017 (DBRM)), summary=[incident=16875]. Tue Jun 16 09:41:50
2015 Sweep [inc][16875]: completed Sweep [inc2][16875]: completed

Answer 1

很明显内存不足，如果服务器内存足够space，尝试增加SGA（和PGA）max size，如果服务器内存不足，考虑加一个或增加/proc/sys/vm/swappiness（只需要）。

Answer 2

我们已在解决该问题的服务器上配置了大页面。

Answer 3

为了能够增加SGA和PGA你需要有内存，... 如果设置大页面，映射 table（table 由进程管理）将自动消耗更少的内存我们有更多的内存来增加 PGA 和 SGA

在 oracle 12.1.0.2 上大量交换

Heavy swapping on oracle 12.1.0.2

oracle

oracle12c