centos7 oracle 12c 内存32G调整为16G
作者:互联网
1. 32G oracle配置
1. 32G oracle配置
[oracle@oracle ~]$ sqlplus /nolog
SQL*Plus: Release 12.2.0.1.0 Production on Thu May 13 08:56:03 2021
Copyright (c) 1982, 2016, Oracle. All rights reserved.
SQL> conn /as sysdba;
Connected.
SQL> show parameter sga;
NAME TYPE VALUE
------------------------------------ ----------- ------------------------------
allow_group_access_to_sga boolean FALSE
lock_sga boolean FALSE
pre_page_sga boolean TRUE
sga_max_size big integer 9664M
sga_min_size big integer 0
sga_target big integer 9664M
unified_audit_sga_queue_size integer 1048576
SQL>
SQL> show parameter pga;
NAME TYPE VALUE
------------------------------------ ----------- ------------------------------
pga_aggregate_limit big integer 6436M
pga_aggregate_target big integer 3218M
SQL> show parameter target;
NAME TYPE VALUE
------------------------------------ ----------- ------------------------------
archive_lag_target integer 0
db_big_table_cache_percent_target string 0
db_flashback_retention_target integer 1440
fast_start_io_target integer 0
fast_start_mttr_target integer 0
memory_max_target big integer 0
memory_target big integer 0
parallel_servers_target integer 128
pga_aggregate_target big integer 3218M
sga_target big integer 9664M
target_pdbs integer 0
2. 32G sysctl.conf配置
cat /etc/sysctl.conf
fs.aio-max-nr = 1048576
fs.file-max = 6815744
kernel.shmall = 3294590
kernel.shmmax = 16868304896
kernel.shmmni= 4096
kernel.sem= 250 32000 100 128
net.ipv4.ip_local_port_range = 9000 65500
net.core.rmem_default = 262144
net.core.rmem_max = 4194304
net.core.wmem_default = 262144
net.core.wmem_max = 1048576
3.16G oracle配置
SQL> show parameter sga;
NAME TYPE VALUE
------------------------------------ ----------- ------------------------------
allow_group_access_to_sga boolean FALSE
lock_sga boolean FALSE
pre_page_sga boolean TRUE
sga_max_size big integer 8096M
sga_min_size big integer 0
sga_target big integer 8000M
unified_audit_sga_queue_size integer 1048576
SQL>
SQL> show parameter pga;
NAME TYPE VALUE
------------------------------------ ----------- ------------------------------
pga_aggregate_limit big integer 2400M
pga_aggregate_target big integer 798M
SQL> show parameter target;
NAME TYPE VALUE
------------------------------------ ----------- ------------------------------
archive_lag_target integer 0
db_big_table_cache_percent_target string 0
db_flashback_retention_target integer 1440
fast_start_io_target integer 0
fast_start_mttr_target integer 0
memory_max_target big integer 0
memory_target big integer 0
parallel_servers_target integer 128
pga_aggregate_target big integer 798M
sga_target big integer 8000M
target_pdbs integer 0
4. 16G sysctl.conf配置
cat /etc/sysctl.conf
fs.aio-max-nr = 1048576
fs.file-max = 6815744
kernel.shmall = 2097152
kernel.shmmax = 4294967295
kernel.shmmni= 4096
kernel.sem= 250 32000 100 128
net.ipv4.ip_local_port_range = 9000 65500
net.core.rmem_default = 262144
net.core.rmem_max = 4194304
net.core.wmem_default = 262144
net.core.wmem_max = 1048576
5. 修改32G oracle 的sysctl.conf
将
kernel.shmall = 3294590
kernel.shmmax = 16868304896
改为
kernel.shmall = 2097152
kernel.shmmax = 4294967295
执行命令使修改生效
sysctl -p
6. 修改32G oracle的配置
SQL> alter system set sga_max_size = 8096M scope=spfile;
System altered.
SQL> alter system set sga_target=8000M scope=spfile;
System altered.
SQL> alter system set pga_aggregate_target=798M scope=both;
System altered.
SQL> alter system set pga_aggregate_limit=2400M scope=both;
System altered.
7.重启oracle
>sqlplus /nolog
>conn /as sysdba
shutdown immediate;
startup;
8.修改服务器内存32G改为16G,然后启动oracle,已验证正常。
作者:yunwei_ls
链接:https://www.jianshu.com/p/04b6f58872fa
来源:简书
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标签:max,12c,target,big,16G,SQL,sga,integer,32G 来源: https://www.cnblogs.com/crnet/p/14918098.html