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没法科学上网的时候如何使用 Google 搜索引擎 at 2015年07月07日
这个不错，简单的对比了几个关键词，与 google 的搜索结果是一致的
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高并发下，第三方登陆的疑问 at 2015年07月03日
怕登录的第三方接口调用阻塞影响业务的响应时间，可以考虑把登录交给单独的 unicorn 比如在 nginx 配置第三方登录的路径走指定另外的 unicorn. 或直接把登录和用户相关的抽出来，用另外一个子域名，做成 passport 服务
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准备入 Ruby on Rails 坑了，你们有什么要说的吗？ at 2015年05月12日
都去玩 elixir
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来斗鱼看逗逼程序员直接写 Ruby 代码 at 2015年02月12日
#27 楼 @mogodb 昨天第一次，试一下 ffmpeg 命令参数而已 昨天晚上有直播的 http://v2ex.com/t/170296#reply26
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来斗鱼看逗逼程序员直接写 Ruby 代码 at 2015年02月12日
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Time.now.at_beginning_of_month 耗时问题 at 2015年02月09日
用过 vmware esxi 的管理界面，可以把机器的主频限制为 1Ghz
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Time.now.at_beginning_of_month 耗时问题 at 2015年02月09日
#6 楼 @zwyan2009 系统是直接装在物理机上面，还是有虚拟化？ 如果有虚拟机，有没有限制 cpu 的使用频率？
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Time.now.at_beginning_of_month 耗时问题 at 2015年02月09日
#4 楼 @zwyan2009 可以把两台机器 cpu 的型号贴出来吗？
i3 CPU M 380 @ 2.53GHz
costs = Benchmark.realtime {Time.now.at_beginning_of_month} *1000 => 0.234701 -
Time.now.at_beginning_of_month 耗时问题 at 2015年02月09日
服务器的 cpu 有些性能非常非常低，特别是 vps，连跟奔 4 的 CPU 都没得比
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字符串数组之间的转换 at 2015年02月02日
'abc'.split('')
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Yosemite 系统取消搜索功能，就不卡啦 at 2015年01月17日
只索引应用程序就行了
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怎么查 Rails 应用的灵异问题? (结帖,问题解决,但具体原因不清楚) at 2015年01月12日
#6 楼 @quakewang 错误日志提示 unicorn 是打印的文本就是这样的 http://underthehood.meltwater.com/blog/2014/03/21/debugging-unicorn-rails-timeouts/
谢谢你们的帮忙，问题暂时算解决了。把数据库迁移到 web 服务器上面来没有发现问题了。数据库服务器是他们甲方配置的，还安装了什么"帕拉迪统一安全管理与综合审计",看这软件的介绍是对系统底层修改蛮大的
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怎么查 Rails 应用的灵异问题? (结帖,问题解决,但具体原因不清楚) at 2015年01月11日
#5 楼 @hooooopo 后台加上 timeout 的日志，现在会报数据库连接问题，有可能是数据库的问题。之前 web 服务与 mysql 都是同一台机器，这个项目是他们要求数据库分离，所以他们另外配置了一台机器。也许是那边的问题，也许是内网网络环境的问题。这边准备把它放一台机器上面再来试试
之前没有出现数据库获取不到连接的问题，是加了 LogBeforeTimeout 才出现，也许是 LogBeforeTimeout 另外起线程导致每次都要获取新的 mysql 连接。但 mysql 的最大连接数已经设置为 256 了，两个进程，共 64 个线程，感觉连接数应该够用了
没有用到 redis 与 memcache. newrelic 准备试试. puma 有个 stdout_redirect 配置参数，也准备来试试
cat log/production.log| grep -v INFO
W, [2015-01-11T08:56:13.948047 #15273] WARN -- : /api/users/login? I’m about to timeout bringing down my unicorn worker too :( F, [2015-01-11T08:56:15.951826 #15273] FATAL -- : ActiveRecord::ConnectionTimeoutError (could not obtain a database connection within 5.000 seconds (waited 5.000 seconds)): config/initializers/log_before_timeout.rb:15:in `call' W, [2015-01-11T08:56:16.535154 #15277] WARN -- : /api/users/login? I’m about to timeout bringing down my unicorn worker too :( F, [2015-01-11T08:56:18.539041 #15277] FATAL -- : ActiveRecord::ConnectionTimeoutError (could not obtain a database connection within 5.000 seconds (waited 5.000 seconds)): config/initializers/log_before_timeout.rb:15:in `call' W, [2015-01-11T08:56:36.107301 #15273] WARN -- : /api/users/login? I’m about to timeout bringing down my unicorn worker too :( F, [2015-01-11T08:56:38.111343 #15273] FATAL -- : ActiveRecord::ConnectionTimeoutError (could not obtain a database connection within 5.000 seconds (waited 5.000 seconds)): config/initializers/log_before_timeout.rb:15:in `call' W, [2015-01-11T08:56:38.654370 #15277] WARN -- : /api/users/login? I’m about to timeout bringing down my unicorn worker too :( F, [2015-01-11T08:56:40.658041 #15277] FATAL -- : ActiveRecord::ConnectionTimeoutError (could not obtain a database connection within 5.000 seconds (waited 5.000 seconds)): config/initializers/log_before_timeout.rb:15:in `call' W, [2015-01-11T08:59:19.421961 #15277] WARN -- : /farm_products/140? I’m about to timeout bringing down my unicorn worker too :( F, [2015-01-11T08:59:21.425568 #15277] FATAL -- : ActiveRecord::ConnectionTimeoutError (could not obtain a database connection within 5.000 seconds (waited 5.000 seconds)): config/initializers/log_before_timeout.rb:15:in `call' -
怎么查 Rails 应用的灵异问题? (结帖,问题解决,但具体原因不清楚) at 2015年01月10日
#2 楼 @quakewang 并发不高，晚上 0 点时也出现这种情况，那个时候基本上几分钟一个请求
ulimit -a 结果
core file size (blocks, -c) 0 data seg size (kbytes, -d) unlimited scheduling priority (-e) 0 file size (blocks, -f) unlimited pending signals (-i) 63706 max locked memory (kbytes, -l) 64 max memory size (kbytes, -m) unlimited open files (-n) 1024 pipe size (512 bytes, -p) 8 POSIX message queues (bytes, -q) 819200 real-time priority (-r) 0 stack size (kbytes, -s) 8192 cpu time (seconds, -t) unlimited max user processes (-u) 63706 virtual memory (kbytes, -v) unlimited file locks (-x) unlimited尝试过 ab 简单测试首页，1w 个请求，100 个并发，失败请求数为 0，也没有看到超时，首页最少查了 4 张表
这台物理机上面放的虚拟机蛮多的，会不会是因为 CPU 没有限制，某些虚拟机把 CPU 占用完了而导致超时？
ps
manor 15270 0.0 1.4 291476 115020 ? Sl 09:19 0:04 puma 2.10.2 (tcp://127.0.0.1:9292) manor 15273 1.5 3.0 1321304 252220 ? Sl 09:19 12:08 puma: cluster worker 0: 15270 manor 15277 1.6 3.0 1318972 251180 ? Sl 09:19 12:54 puma: cluster worker 1: 15270rails log, 这是今天上午以来的超时日志，像 squog48480.txt 这个路径是不存在的，是别人在扫描，但也超时了 8 秒钟
W, [2015-01-10T14:10:12.408338 #15273] WARN -- : /admin/pay_details?utf8=%E2%9C%93&q%5Border_number_cont%5D=&q%5Bpay_order_product_orders_order_number_eq%5D=150109455847&commit=%E6%90%9C%E7%B4%A2 I’m about to timeout bringing down my unicorn worker too :( W, [2015-01-10T14:10:44.467813 #15273] WARN -- : /admin/pay_details?utf8=%E2%9C%93&q%5Border_number_cont%5D=&q%5Bpay_order_product_orders_order_number_eq%5D=150109580972&commit=%E6%90%9C%E7%B4%A2 I’m about to timeout bringing down my unicorn worker too :( W, [2015-01-10T14:25:57.898674 #15273] WARN -- : /admin/pay_details/415? I’m about to timeout bringing down my unicorn worker too :( W, [2015-01-10T14:36:19.919086 #15273] WARN -- : /products/7? I’m about to timeout bringing down my unicorn worker too :( W, [2015-01-10T14:36:24.623033 #15273] WARN -- : /admin/pay_details/415? I’m about to timeout bringing down my unicorn worker too :( W, [2015-01-10T14:36:40.778678 #15273] WARN -- : /products/7? I’m about to timeout bringing down my unicorn worker too :( W, [2015-01-10T14:39:51.156973 #15273] WARN -- : /admin/product_orders? I’m about to timeout bringing down my unicorn worker too :( W, [2015-01-10T14:42:20.671041 #15273] WARN -- : /admin/manors/28? I’m about to timeout bringing down my unicorn worker too :( W, [2015-01-10T14:42:22.235304 #15273] WARN -- : /admin/manors/28? I’m about to timeout bringing down my unicorn worker too :( W, [2015-01-10T14:56:17.433214 #15273] WARN -- : /farm_products/151? I’m about to timeout bringing down my unicorn worker too :( W, [2015-01-10T15:28:11.755474 #15273] WARN -- : /admin/login? I’m about to timeout bringing down my unicorn worker too :( W, [2015-01-10T15:28:19.967264 #15273] WARN -- : /admin/coupons/1? I’m about to timeout bringing down my unicorn worker too :( W, [2015-01-10T16:09:20.641891 #15273] WARN -- : /farm_products/203?from=singlemessage&isappinstalled=0 I’m about to timeout bringing down my unicorn worker too :( W, [2015-01-10T16:09:44.190186 #15273] WARN -- : /? I’m about to timeout bringing down my unicorn worker too :( W, [2015-01-10T16:28:58.509238 #15273] WARN -- : /manors/28? I’m about to timeout bringing down my unicorn worker too :( W, [2015-01-10T16:28:58.509812 #15273] WARN -- : /farm_products/204? I’m about to timeout bringing down my unicorn worker too :( W, [2015-01-10T16:28:58.512869 #15273] WARN -- : /about? I’m about to timeout bringing down my unicorn worker too :( W, [2015-01-10T16:28:58.513834 #15273] WARN -- : /farm_products? I’m about to timeout bringing down my unicorn worker too :( W, [2015-01-10T16:28:58.520793 #15273] WARN -- : /farm_products/203? I’m about to timeout bringing down my unicorn worker too :( W, [2015-01-10T16:28:59.594871 #15273] WARN -- : /? I’m about to timeout bringing down my unicorn worker too :( W, [2015-01-10T16:28:59.618843 #15273] WARN -- : /manors? I’m about to timeout bringing down my unicorn worker too :( W, [2015-01-10T16:28:59.632609 #15273] WARN -- : /login? I’m about to timeout bringing down my unicorn worker too :( W, [2015-01-10T16:28:59.632963 #15273] WARN -- : /farm_products/list?cid=1 I’m about to timeout bringing down my unicorn worker too :( W, [2015-01-10T16:29:08.643499 #15273] WARN -- : /manors/28? I’m about to timeout bringing down my unicorn worker too :( W, [2015-01-10T16:29:08.646714 #15273] WARN -- : /farm_products/204? I’m about to timeout bringing down my unicorn worker too :( W, [2015-01-10T16:29:09.600770 #15273] WARN -- : /? I’m about to timeout bringing down my unicorn worker too :( W, [2015-01-10T16:29:13.687735 #15273] WARN -- : /manors/28? I’m about to timeout bringing down my unicorn worker too :( W, [2015-01-10T16:29:13.695943 #15273] WARN -- : /manors/28? I’m about to timeout bringing down my unicorn worker too :( W, [2015-01-10T16:29:13.695795 #15273] WARN -- : /manors/28? I’m about to timeout bringing down my unicorn worker too :( W, [2015-01-10T16:29:15.992802 #15273] WARN -- : /farm_products/204? I’m about to timeout bringing down my unicorn worker too :( W, [2015-01-10T16:29:15.994440 #15273] WARN -- : /farm_products/204? I’m about to timeout bringing down my unicorn worker too :( W, [2015-01-10T16:29:15.995973 #15273] WARN -- : /farm_products/204? I’m about to timeout bringing down my unicorn worker too :( W, [2015-01-10T16:29:16.003169 #15273] WARN -- : /farm_products/204? I’m about to timeout bringing down my unicorn worker too :( W, [2015-01-10T16:29:16.006432 #15273] WARN -- : /farm_products/204? I’m about to timeout bringing down my unicorn worker too :( W, [2015-01-10T16:29:16.013690 #15273] WARN -- : /farm_products/204? I’m about to timeout bringing down my unicorn worker too :( W, [2015-01-10T16:29:19.624268 #15273] WARN -- : /? I’m about to timeout bringing down my unicorn worker too :( W, [2015-01-10T16:30:02.932361 #15273] WARN -- : /? I’m about to timeout bringing down my unicorn worker too :( W, [2015-01-10T17:17:48.064364 #15273] WARN -- : /products/23? I’m about to timeout bringing down my unicorn worker too :( W, [2015-01-10T17:18:29.761654 #15273] WARN -- : /farm_products/151? I’m about to timeout bringing down my unicorn worker too :( W, [2015-01-10T17:23:53.770625 #15273] WARN -- : /farm_products/168? I’m about to timeout bringing down my unicorn worker too :( W, [2015-01-10T17:30:08.645647 #15273] WARN -- : /? I’m about to timeout bringing down my unicorn worker too :( W, [2015-01-10T17:31:42.602090 #15273] WARN -- : /mapi/merchants/login? I’m about to timeout bringing down my unicorn worker too :( W, [2015-01-10T18:23:42.086524 #15273] WARN -- : /manors/27? I’m about to timeout bringing down my unicorn worker too :( W, [2015-01-10T18:24:09.796062 #15273] WARN -- : /farm_products/209? I’m about to timeout bringing down my unicorn worker too :( W, [2015-01-10T18:24:21.304103 #15273] WARN -- : /user_coupons? I’m about to timeout bringing down my unicorn worker too :( W, [2015-01-10T18:24:24.149114 #15273] WARN -- : /pay_orders/274? I’m about to timeout bringing down my unicorn worker too :( W, [2015-01-10T18:24:41.174035 #15273] WARN -- : /user_coupons? I’m about to timeout bringing down my unicorn worker too :( W, [2015-01-10T18:24:56.974919 #15273] WARN -- : /user_coupons? I’m about to timeout bringing down my unicorn worker too :( W, [2015-01-10T18:25:31.223952 #15273] WARN -- : /? I’m about to timeout bringing down my unicorn worker too :( W, [2015-01-10T18:27:28.185707 #15273] WARN -- : /pay_orders/from_product_order?product_order_id=321 I’m about to timeout bringing down my unicorn worker too :( W, [2015-01-10T18:27:31.065133 #15273] WARN -- : /products/4? I’m about to timeout bringing down my unicorn worker too :( W, [2015-01-10T18:27:49.097025 #15273] WARN -- : /farm_products/131? I’m about to timeout bringing down my unicorn worker too :( W, [2015-01-10T18:28:17.217875 #15273] WARN -- : /tourism_products/14? I’m about to timeout bringing down my unicorn worker too :( W, [2015-01-10T18:28:28.265505 #15273] WARN -- : /pay_orders/277/go? I’m about to timeout bringing down my unicorn worker too :( W, [2015-01-10T18:28:46.029485 #15273] WARN -- : /notes/4? I’m about to timeout bringing down my unicorn worker too :( W, [2015-01-10T18:47:42.219719 #15273] WARN -- : /farm_products/list?cid=4 I’m about to timeout bringing down my unicorn worker too :( W, [2015-01-10T18:47:43.973957 #15273] WARN -- : /farm_products/list?cid=4 I’m about to timeout bringing down my unicorn worker too :( W, [2015-01-10T18:48:05.570790 #15273] WARN -- : /farm_products/list?cid=2&page=2 I’m about to timeout bringing down my unicorn worker too :( W, [2015-01-10T19:57:21.140408 #15273] WARN -- : /buddies/new? I’m about to timeout bringing down my unicorn worker too :( W, [2015-01-10T20:01:20.062225 #15273] WARN -- : /manors/3? I’m about to timeout bringing down my unicorn worker too :( W, [2015-01-10T20:03:00.752695 #15273] WARN -- : /manors/3? I’m about to timeout bringing down my unicorn worker too :( W, [2015-01-10T20:28:55.244187 #15273] WARN -- : /? I’m about to timeout bringing down my unicorn worker too :( W, [2015-01-10T20:30:42.501772 #15273] WARN -- : /? I’m about to timeout bringing down my unicorn worker too :( W, [2015-01-10T20:36:58.784065 #15273] WARN -- : /activities? I’m about to timeout bringing down my unicorn worker too :( W, [2015-01-10T20:40:28.962651 #15273] WARN -- : /? I’m about to timeout bringing down my unicorn worker too :( W, [2015-01-10T20:41:06.718788 #15273] WARN -- : /? I’m about to timeout bringing down my unicorn worker too :( W, [2015-01-10T20:47:15.851442 #15273] WARN -- : /? I’m about to timeout bringing down my unicorn worker too :( W, [2015-01-10T20:56:22.624565 #15273] WARN -- : /? I’m about to timeout bringing down my unicorn worker too :( W, [2015-01-10T20:59:53.813606 #15273] WARN -- : /uztce33383.txt? I’m about to timeout bringing down my unicorn worker too :( W, [2015-01-10T21:02:09.573501 #15273] WARN -- : /? I’m about to timeout bringing down my unicorn worker too :( W, [2015-01-10T21:08:49.833639 #15273] WARN -- : /? I’m about to timeout bringing down my unicorn worker too :( W, [2015-01-10T21:10:52.103289 #15273] WARN -- : /squog48480.txt? I’m about to timeout bringing down my unicorn worker too :( W, [2015-01-10T21:19:50.979843 #15273] WARN -- : /? I’m about to timeout bringing down my unicorn worker too :( W, [2015-01-10T21:38:22.530999 #15273] WARN -- : /? I’m about to timeout bringing down my unicorn worker too :( W, [2015-01-10T21:44:01.503328 #15273] WARN -- : /farm_products/165? I’m about to timeout bringing down my unicorn worker too :( W, [2015-01-10T21:54:59.149493 #15273] WARN -- : /forget? I’m about to timeout bringing down my unicorn worker too :( W, [2015-01-10T22:00:11.402326 #15273] WARN -- : /? I’m about to timeout bringing down my unicorn worker too :( W, [2015-01-10T22:03:53.743778 #15273] WARN -- : /manor_product? I’m about to timeout bringing down my unicorn worker too :( W, [2015-01-10T22:04:54.059040 #15273] WARN -- : /? I’m about to timeout bringing down my unicorn worker too :( W, [2015-01-10T22:31:22.260466 #15273] WARN -- : /tourism_products/6? I’m about to timeout bringing down my unicorn worker too :( W, [2015-01-10T22:41:30.776601 #15273] WARN -- : /products/40? I’m about to timeout bringing down my unicorn worker too :( W, [2015-01-10T22:41:40.844292 #15273] WARN -- : /products/40? I’m about to timeout bringing down my unicorn worker too :( -
怎么查 Rails 应用的灵异问题? (结帖,问题解决,但具体原因不清楚) at 2015年01月10日
#1 楼 @huacnlee nginx site conf
server { listen 80; server_name www.xxx.com; root /home/manor/app/current/public; access_log /var/log/nginx/xxx.com.access.log main; error_page 404 /404.html; error_page 500 502 503 504 /50x.html; location = /50x.html { root /usr/share/nginx/html; } location ~* \.(js|css|png|jpg|jpeg|gif|ico)$ { expires 30d; access_log off; } location / { index index.html; try_files $uri @manorpuma; } location @manorpuma { proxy_set_header X-Real-IP $remote_addr; proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for; proxy_set_header Host $http_host; proxy_redirect off; proxy_pass http://127.0.0.1:9292; } }nginx conf
user nginx; worker_processes 1; error_log /var/log/nginx/error.log warn; pid /var/run/nginx.pid; events { worker_connections 1024; } http { include /etc/nginx/mime.types; default_type application/octet-stream; log_format main '$remote_addr - $remote_user [$time_local] "$request" ' '$status $body_bytes_sent "$http_referer" ' '"$http_user_agent" "$http_x_forwarded_for"'; sendfile on; #tcp_nopush on; keepalive_timeout 65; server_tokens off; client_max_body_size 10m; #gzip on; include /etc/nginx/conf.d/*.conf; }puma conf
base_name = 'manor' directory "/home/#{base_name}/app/current" worker_timeout 10 workers 2 threads 8,32 #bind "unix:///home/#{base_name}/app/current/tmp/puma.sock?mask=0777" bind "tcp://127.0.0.1:9292" pidfile "/home/#{base_name}/app/current/tmp/puma.pid" state_path "/home/#{base_name}/app/current/tmp/puma.state" preload_app! on_worker_boot do #$redis.client.reconnect ActiveRecord::Base.connection.reconnect! end502 请求出现的路径也是随机的，也的只是后台简单的单表查询
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为何淘宝有那么多便宜 VPS 的原因？ at 2015年01月10日
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为何淘宝有那么多便宜 VPS 的原因？ at 2015年01月09日
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寻找一个创业技术合伙人 at 2015年01月03日
产品经理就不要抢架构师这个马甲了，你让程序员还怎么混 -_-
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捣鼓算法有意义么? at 2014年12月23日
学习怎么写出最好的代码
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在某些现状上，今天的 Ruby 就如同 8 年前的 PHP at 2014年12月19日
非一线城市，不要在主要业务是外包项目的公司推小众语言。到时有更好的工作机会，走是个难题. 从年初做到年底，20 人左右的开发组，去年在的码农只剩两三个，还有一个计划年后走。外包水深，慎重
python 与 ruby 在 web 领域也发展了这么多年，没有在企业建站这种草根领域发展，注定是小众的语言. php 是跟 asp 抢企业建站的领域，从 Drupal 还这么火知道是 PHP 赢了
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难以忍受 Yosemite 卡顿，看看抹盘重装看看如何 at 2014年11月28日
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难以忍受 Yosemite 卡顿，看看抹盘重装看看如何 at 2014年11月27日
09 年的 macbook，还是用机械硬盘。平常用 vim,chrome 不卡. 刚开机无缓存应用数据到内存时一般会很卡。
10.10.1 的 wifi 有时还是会断
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有必要用 rails_admin 吗？ at 2014年09月21日
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咨询：高手都是如何高效便捷的处理 Windows 下的中文路径编码问题 at 2014年09月04日
用 python
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新项目用了 4.1，发现 enum 没有 i18n 的支持 at 2014年09月04日
stackoverflow 上有个简单的实现，你可以看看 http://stackoverflow.com/questions/22827270/how-to-use-i18n-with-rails-4-enums
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有网页界面配置角色权限的 Rails 的开源系统参考吗? at 2014年08月29日
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前端招聘中，“熟悉一门后端语言” 具体是什么要求？ at 2014年08月23日
意思就是当后端没人了，你就是后端。前端不过是作为后端的技能里面的一种
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启动 rails server 命令，时好时坏~囧，求病根在哪！ at 2014年07月22日
- 运行 rails server 会显示帮助，是因为你没有在 rails 项目的根目录下运行
- rvm 之前是用.rvmrc 文件控制 ruby 与 gemset 的自动切换，新版的 rvm 是用.ruby-gemset 和.ruby-version 控制，一般这三个文件在 git 里面要全局忽略
在工程目录下，运行下面命令
rvm use ruby-2.1.1@kitty --ruby-version记得把 ruby-2.1.1 换成你的 ruby 版本，kitty 换成你的 gmeset 名，--ruby-version 参数是生成.ruby-gemset 和.ruby-version 文件
你可以运行
rvm help use查看 use 指令的具体使用方法 https://rvm.io/workflow/projects#ruby-versions
