在进行一个greenplum安装之前需要进行配置一下相关的系统参数,否则很容易出现意想不到的错误.
1.修改系统参数 编辑 /etc/sysctl.conf ，以下是最小配置 kernel.shmmax = 500000000 kernel.shmmni = 4096 kernel.shmall = 4000000000 kernel.sem = 250 512000 100 2048 kernel.sysrq = 1 kernel.core_uses_pid = 1 kernel.msgmnb = 65536 kernel.msgmax = 65536 kernel.msgmni = 2048 net.ipv4.tcp_syncookies = 1 net.ipv4.ip_forward = 0 net.ipv4.conf.default.accept_source_route = 0 net.ipv4.tcp_tw_recycle = 1 net.ipv4.tcp_max_syn_backlog = 4096 net.ipv4.conf.all.arp_filter = 1 net.ipv4.ip_local_port_range = 1025 65535 net.core.netdev_max_backlog = 10000 net.core.rmem_max = 2097152 net.core.wmem_max = 2097152 vm.overcommit_memory = 2 修改后需要reboot 2.修改文件打开数等限制 编辑/etc/security/limits.conf * soft nofile 65536 * hard nofile 65536 * soft nproc 131072 * hard nproc 131072 编辑/etc/security/limits.d/90-nproc.conf * soft nofile 65536 * hard nofile 65536 * soft nproc 131072 * hard nproc 131072 3.修改scheduler 编辑scheduler，原先默认是cfq echo deadline > /sys/block/vda/queue/scheduler [[email protected] ~]# more /sys/block/vda/queue/scheduler noop anticipatory [deadline] cfq 4.编辑/boot/grub/grub.conf 新增 elevator=deadline [root @bigdata03 ~]# more /boot/grub/grub.conf ...elevator=deadline crashkernel=auto ... 5.编辑设备块大小 [root@bigdata03 ~]# /sbin/blockdev --setra 16384 /dev/vda [root@bigdata03 ~]# /sbin/blockdev --getra /dev/vda 16384
具体参考:http://gpdb.docs.pivotal.io/4370/prep_os-system-params.html#topic3
其实我没改相关系统参数之前,碰到最多的错误就是"设备磁盘空间不足".
官网给出的修改方案固然可行,不过有更方便的修改方案:
针对第一条:修改系统参数
sysctl -p - >> /etc/sysctl.conf <<EOF kernel.shmmax = 500000000 kernel.shmmni = 4096 kernel.shmall = 4000000000 kernel.sem = 250 512000 100 2048 kernel.sysrq = 1 kernel.core_uses_pid = 1 kernel.msgmnb = 65536 kernel.msgmax = 65536 kernel.msgmni = 2048 net.ipv4.tcp_syncookies = 1 net.ipv4.ip_forward = 0 net.ipv4.conf.default.accept_source_route = 0 net.ipv4.tcp_tw_recycle = 1 net.ipv4.tcp_max_syn_backlog = 4096 net.ipv4.conf.all.arp_filter = 1 net.ipv4.ip_local_port_range = 1025 65535 net.core.netdev_max_backlog = 10000 net.core.rmem_max = 2097152 net.core.wmem_max = 2097152 vm.overcommit_memory = 2 EOF这样修改的可以不用reboot
时间： 2024-10-13 02:39:39