1.

mongodb从配置文件启动

创建配置文件：/usr/local/mongodb/etc/mongodb.conf

配置文件的内容为：

#Directory and relavent set

dbpath = /var/mongodb/data

logpath = /var/mongodb/logs/log.log

profile=2

slowms=100

#repairpath = /var/mongodb/repair

pidfilepath = /usr/local/mongodb/mongodb.pid

#directoryperdb = true

#sysinfo = true

#verbose = true

#logappend = true

#cpu = true

#Network and security set

noauth = true

#port = 8888

#maxConns = 1024

fork = true

#Management

#nohttpinterface = true

#rest = true

#quota = true

#quotaFiles = 1024

#nssize = 16

#syncdelay = 5

当中

profile=2代表打印全部

slowms代表超过几秒的操作。

结果输出到logpath中

noauth代表启动账户验证

2.

通过配置文件启动

/usr/local/mongodb/bin/mongod -f /usr/local/mongodb/etc/mongodb.conf

启动成功后显示：

about to fork child process, waiting until server is ready for connections.

forked process: 389

child process started successfully, parent exiting

3.mysql5.6开启慢查询

vim my.cnf

代表超过一秒的查询为慢查询，慢查询写入文件mysql-slow.log文件里

log-error=/var/log/mysql-error.log

slow_query_log=1

slow_query_log_file=/www/web_logs/mysql/mysql-slow.log