MongoDB|MongoDB 启动问题解决 MongoDB启动问题解决

# mongo MongoDB shell version: 3.2.16 connecting to: test Welcome to the MongoDB shell. For interactive help, type "help". For more comprehensive documentation, see http://docs.mongodb.org/ Questions? Try the support group http://groups.google.com/group/mongodb-user Server has startup warnings: 2017-08-17T17:27:31.443+0800 I CONTROL[initandlisten] 2017-08-17T17:27:31.443+0800 I CONTROL[initandlisten] ** WARNING: You are running on a NUMA machine. 2017-08-17T17:27:31.443+0800 I CONTROL[initandlisten] **We suggest launching mongod like this to avoid performance problems: 2017-08-17T17:27:31.443+0800 I CONTROL[initandlisten] **numactl --interleave=all mongod [other options] 2017-08-17T17:27:31.443+0800 I CONTROL[initandlisten] 2017-08-17T17:27:31.443+0800 I CONTROL[initandlisten] ** WARNING: /sys/kernel/mm/transparent_hugepage/enabled is 'always'. 2017-08-17T17:27:31.443+0800 I CONTROL[initandlisten] **We suggest setting it to 'never' 2017-08-17T17:27:31.443+0800 I CONTROL[initandlisten] 2017-08-17T17:27:31.443+0800 I CONTROL[initandlisten] ** WARNING: /sys/kernel/mm/transparent_hugepage/defrag is 'always'. 2017-08-17T17:27:31.443+0800 I CONTROL[initandlisten] **We suggest setting it to 'never' 2017-08-17T17:27:31.443+0800 I CONTROL[initandlisten] 2017-08-17T17:27:31.444+0800 I CONTROL[initandlisten] ** WARNING: soft rlimits too low. rlimits set to 1024 processes, 64000 files. Number of processes should be at least 32000 : 0.5 times number of files. 2017-08-17T17:27:31.444+0800 I CONTROL[initandlisten] >

第一个问题： soft rlimits too low. rlimits set to 1024 processes, 64000 files. Number of processes should be at least 32000 : 0.5 times number of files.

解决方法： 1.系统级别 # vi /etc/sysctl.conf fs.file-max = 100000 # sysctl -p查看方法： # cat /proc/sys/fs/file-max # sysctl fs.file-max2.用户级别设置方法： # vi /etc/security/limits.conf mongod soft nofile 65535 mongod hard nofile 65535 mongod soft nproc 32768 mongod hard nproc 32768查看方法： # su - user $ ulimit -Hn $ ulimit -Sn注意： root用户还需单独设置 # vi /etc/security/limits.conf root soft nofile 65536 root hard nofile 65535CentOS还需开启PAM模块 # vi /etc/pam.d/login session required pam_limits.so

【MongoDB|MongoDB 启动问题解决】第二个问题：
WARNING: /sys/kernel/mm/transparent_hugepage/enabled is 'always'.We suggest setting it to 'never'
WARNING: /sys/kernel/mm/transparent_hugepage/defrag is 'always'.We suggest setting it to 'never'

解决方法： echo never > /sys/kernel/mm/transparent_hugepage/enabled echo never > /sys/kernel/mm/redhat_transparent_hugepage/defrag# vim /etc/rc.local echo never > /sys/kernel/mm/transparent_hugepage/enabled echo never > /sys/kernel/mm/redhat_transparent_hugepage/defrag查看方法： # cat /sys/kernel/mm/transparent_hugepage/enabled always madvise [never] # cat /sys/kernel/mm/redhat_transparent_hugepage/defrag always madvise [never]

第三个问题：
WARNING: You are running on a NUMA machine.We suggest launching mongod like this to avoid performance problems:numactl --interleave=all mongod [other options]