DB2数据库参数建议(Linux)

内核参数配置:

kernel.shmall=<物理内存的90%,以页为单位>

kernel.shmax=<实际的物理内存>

kernel.shmmni=16384



kernel.msgmax=192000

kernel.msgmnb=192000

kernel.msgmni=65536



kernel.sem=250 256000 32 256*<RAM大小,以GB计>

kernel.randomize_va_space=0

vm.swappiness=0

如上内容添加到/etc/sysctl.conf
执行sysctl -a

用户资源配置:
对实例用户,fence用户,应用用户添加如下限制:

db2inst1      soft   nproc    10240

db2inst1      hard   nproc    10240

db2inst1      soft   nofile    65000

db2inst1      hard   nofile    65000

db2inst1      soft   stack    -1

db2inst1      hard   stack    -1

db2inst1      soft   data    -1

db2inst1      hard   data    -1

db2inst1      soft   fsize    -1

db2inst1      hard   fsize    -1

db2inst1      soft   rss    -1

db2inst1      hard   rss    -1

以上内存添加到/etc/security/limtis.conf

db2注册变量设置:

db2set DB2_LAOD_COPY_NO_OVERRIDE=nonrecoverable

db2set DB2_USE_FAST_PREALLOCATION=ON

db2set DB2_MEM_TUNING_RANGE=40,90

DB参数:

db2 update db cfg for <dbname> using logbufsiz 1024 (至少4M)

 

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