sybase优化
时间:2010-03-04 来源:2008sgh
-bash-3.00$ ./startserver -f RUN_sgh
-bash-3.00$ 00:00000:00000:2010/03/04 09:49:26.43 kernel SySAM: Using licenses from: /opt/sybase/SYSAM-2_0/licenses
00:00000:00000:2010/03/04 09:49:26.49 kernel SySAM: Checked out license for 1 ASE_CORE (2008.06200/permanent/1A12 9D41 FA65 7CD2).
00:00000:00000:2010/03/04 09:49:26.49 kernel This product is licensed to: MINISTRY OF PUBLIC NETWORK SUPERVSI
00:00000:00000:2010/03/04 09:49:26.49 kernel Checked out license ASE_CORE
00:00000:00000:2010/03/04 09:49:26.51 kernel Adaptive Server Enterprise (Enterprise Edition)
00:00000:00000:2010/03/04 09:49:26.51 kernel Using config area from primary master device.
00:00000:00000:2010/03/04 09:49:26.52 kernel os_create_region: can't allocate 1048576000 bytes
00:00000:00000:2010/03/04 09:49:26.52 kernel kbcreate: couldn't create kernel region.
00:00000:00000:2010/03/04 09:49:26.52 kernel kistartup: could not create shared memory
-bash-3.00$ ./startserver -f RUN_sgh
-bash-3.00$ 00:00000:00000:2010/03/04 12:57:42.87 kernel SySAM: Using licenses from: /opt/sybase/SYSAM-2_0/licenses
00:00000:00000:2010/03/04 12:57:42.91 kernel SySAM: Checked out license for 1 ASE_CORE (2008.06200/permanent/1A12 9D41 FA65 7CD2).
00:00000:00000:2010/03/04 12:57:42.91 kernel This product is licensed to: MINISTRY OF PUBLIC NETWORK SUPERVSI
00:00000:00000:2010/03/04 12:57:42.91 kernel Checked out license ASE_CORE
00:00000:00000:2010/03/04 12:57:42.91 kernel Adaptive Server Enterprise (Enterprise Edition)
00:00000:00000:2010/03/04 12:57:42.92 kernel Using config area from primary master device.
00:00000:00000:2010/03/04 12:57:42.93 server The value of the 'max memory' parameter (262144) defined in the configuration file is not high enough to set the other parameter values specified in the configuration file. 'max memory' should be greater than the 'total logical memory' '26457
出现上述提示,都是由于下述三个数据库参数没有优化配置好.
在/opt/sybase/ASE-15_0/xx.cfg配置文件中,对下述参数进行优化.
(另如果数据库已经打开了,可以进入isql,则在islq>下输入下述语句就可以进行优化了.)
针对2g内存(redflag中为free -m or top),多次测试后,最终参数为(数据库可以起来,不报错)
max memory procedure cache size default data cache
262144 0.5g 50m 300m
--设置数据库能够使用的最大内存数,单位为2K,下面配置为2G(1024*1024)
sp_configure 'max memory',1048576
--设置过程缓存,单位为2K,下面配置为200M(100*1024)
sp_configure 'procedure cache size',102400
--设置数据库默认的数据缓存,一般为最大内存值的60%,针对2G内存,一般配置为1.2G
sp_cacheconfig 'default data cache','1200M'
--设置数据库允许的最大用户连接数,下面配置为100个
sp_configure 'number of user connections',100
--设置数据库最大的锁数量,下面配置为50000个
sp_configure 'number of locks',50000
--设置数据库允许的最大设备数量,下面配置为100个
sp_configure 'number of devices',100
--让数据库在启动的时候一次性收集完所有内存
sp_configure 'allocate max shared memory','1'
--设置数据库最大可使用的CPU数,下面配置为3个
sp_configure 'max online engines',3
--设置在数据库启动时加载的CPU数,下面配置为3个
sp_configure 'number of engines at startup',3
-- sybase多CPU配置注意事项:
-- 如果发现配置多个CPU后只能加载一个,请在启动sybase前执行命令"ulimit -s unlimited",可以将该命令加入到".bash_profiles"文件中,以免每次都执行
-- sybase大内存配置注意事项:
-- 针对64位sybase配置大内存,如果在配置了大内存后数据库无法启动,请按如下方法修改linux环境参数,再启动sybase
-- 1.使用命令"vi /etc/sysctl.conf" 修改属性"kernel.shmmax"的值为"内存值(单位G)*1024*1024*1024"
-- 2.修改完成后使用命令"sysctl -p"使更改生效