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How do you discover model attributes in Rails?

... current_sign_in_at: datetime, last_sign_in_at: datetime, current_sign_in_ip: string, last_sign_in_ip: string, created_at: datetime, updated_at: datetime)" Alternatively, having run rake db:create and rake db:migrate for your development environment, the file db/schema.rb will contain the author...
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What is the strict aliasing rule?

...an example that should not be surprising (live example): int x = 10; int *ip = &x; std::cout << *ip << "\n"; *ip = 12; std::cout << x << "\n"; We have a int* pointing to memory occupied by an int and this is a valid aliasing. The optimizer must assume that assignments...
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MongoDB与内存 - 大数据 & AI - 清泛网 - 专注IT技能提升

...: shell> sysctl vm.drop_caches=1 平时可以通过mongo命令行来监控MongoDB的内存使用情况,如下所示: mongo> db.serverStatus().mem: { "resident" : 22346, "virtual" : 1938524, "mapped" : 962283 } 还可以通过mongostat命令来监控MongoDB的内存使...
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MongoDB与内存 - 大数据 & AI - 清泛网 - 专注IT技能提升

...: shell> sysctl vm.drop_caches=1 平时可以通过mongo命令行来监控MongoDB的内存使用情况,如下所示: mongo> db.serverStatus().mem: { "resident" : 22346, "virtual" : 1938524, "mapped" : 962283 } 还可以通过mongostat命令来监控MongoDB的内存使...
https://www.tsingfun.com/it/bi... 

MongoDB与内存 - 大数据 & AI - 清泛网 - 专注IT技能提升

...: shell> sysctl vm.drop_caches=1 平时可以通过mongo命令行来监控MongoDB的内存使用情况,如下所示: mongo> db.serverStatus().mem: { "resident" : 22346, "virtual" : 1938524, "mapped" : 962283 } 还可以通过mongostat命令来监控MongoDB的内存使...
https://www.tsingfun.com/it/bi... 

MongoDB与内存 - 大数据 & AI - 清泛网 - 专注IT技能提升

...: shell> sysctl vm.drop_caches=1 平时可以通过mongo命令行来监控MongoDB的内存使用情况,如下所示: mongo> db.serverStatus().mem: { "resident" : 22346, "virtual" : 1938524, "mapped" : 962283 } 还可以通过mongostat命令来监控MongoDB的内存使...
https://www.tsingfun.com/it/bi... 

MongoDB与内存 - 大数据 & AI - 清泛网 - 专注IT技能提升

...: shell> sysctl vm.drop_caches=1 平时可以通过mongo命令行来监控MongoDB的内存使用情况,如下所示: mongo> db.serverStatus().mem: { "resident" : 22346, "virtual" : 1938524, "mapped" : 962283 } 还可以通过mongostat命令来监控MongoDB的内存使...
https://www.tsingfun.com/it/bi... 

MongoDB与内存 - 大数据 & AI - 清泛网 - 专注IT技能提升

...: shell> sysctl vm.drop_caches=1 平时可以通过mongo命令行来监控MongoDB的内存使用情况,如下所示: mongo> db.serverStatus().mem: { "resident" : 22346, "virtual" : 1938524, "mapped" : 962283 } 还可以通过mongostat命令来监控MongoDB的内存使...
https://www.tsingfun.com/it/bi... 

MongoDB与内存 - 大数据 & AI - 清泛网 - 专注IT技能提升

...: shell> sysctl vm.drop_caches=1 平时可以通过mongo命令行来监控MongoDB的内存使用情况,如下所示: mongo> db.serverStatus().mem: { "resident" : 22346, "virtual" : 1938524, "mapped" : 962283 } 还可以通过mongostat命令来监控MongoDB的内存使...
https://www.tsingfun.com/it/bi... 

MongoDB与内存 - 大数据 & AI - 清泛网 - 专注IT技能提升

...: shell> sysctl vm.drop_caches=1 平时可以通过mongo命令行来监控MongoDB的内存使用情况,如下所示: mongo> db.serverStatus().mem: { "resident" : 22346, "virtual" : 1938524, "mapped" : 962283 } 还可以通过mongostat命令来监控MongoDB的内存使...