我有一个在Heroku上运行的Rails 5应用程序，运行得相当快，直到大约三周前，我安装了Websolr进行客户搜索。
从那时起，即使在不使用Solr的页面上，我也有随机较长的响应时间。以下是加载请求，该请求花费了超过一分钟的时间。我确实意识到我需要进行一些急切的加载，但是即使进行基本联接并通过ID查找记录有时也可能需要30秒。在任何给定时间，我的内存分配似乎都保持在30％左右，但是我使用的是登台数据库（9美元一个）。我对websolr的请求也要花费一些时间，因此不仅是此查询。我的数据库有大约5000个客户记录和另外8000个工作记录。在任何给定时间只有大约4个用户在使用此功能，因此我的流量不多。
我正在512 mb RAM上运行三个标准1x dynos。我的回复时间目前显示为30秒。
Dec 27 14:31:42 enigmatic-temple-38800 app/web.1: I, [2018-12-27T22:31:42.063716 #4] INFO -- : [f80358c4-cf90-4004-86c0-4389c9fbc264] Started
GET "/jobs?type=list" for 76.107.177.174 at 2018-12-27 22:31:42 +0000
Dec 27 14:31:42 enigmatic-temple-38800 app/web.1: I, [2018-12-27T22:31:42.066904 #4] INFO -- : [f80358c4-cf90-4004-86c0-4389c9fbc264]
Processing by JobsController#index as HTML
Dec 27 14:31:42 enigmatic-temple-38800 app/web.1: I, [2018-12-27T22:31:42.067042 #4] INFO -- : [f80358c4-cf90-4004-86c0-4389c9fbc264]
Parameters: {"type"=>"list"}
Dec 27 14:31:42 enigmatic-temple-38800 app/web.1: D, [2018-12-27T22:31:42.071352 #4] DEBUG -- : [f80358c4-cf90-4004-86c0-4389c9fbc264] User Load (1.3ms) SELECT "users".* FROM "users" WHERE "users"."id" = $1 ORDER BY "users"."id" ASC LIMIT $2 [["id", 9], ["LIMIT", 1]]
Dec 27 14:31:42 enigmatic-temple-38800 app/web.1: D, [2018-12-27T22:31:42.079628 #4] DEBUG -- : [f80358c4-cf90-4004-86c0-4389c9fbc264] Location Load (3.6ms) SELECT "locations".* FROM "locations" INNER JOIN "locations_users" ON "locations"."id" = "locations_users"."location_id" WHERE "locations_users"."user_id" = $1 AND "locations"."id" = $2 LIMIT $3 [["user_id", 9], ["id", 3], ["LIMIT", 1]]
Dec 27 14:31:42 enigmatic-temple-38800 app/web.1: D, [2018-12-27T22:31:42.086265 #4] DEBUG -- : [f80358c4-cf90-4004-86c0-4389c9fbc264] CACHE Location Load (0.3ms) SELECT "locations".* FROM "locations" INNER JOIN "locations_users" ON "locations"."id" = "locations_users"."location_id" WHERE "locations_users"."user_id" = $1 AND "locations"."id" = $2 LIMIT $3 [["user_id", 9], ["id", 3], ["LIMIT", 1]]
Dec 27 14:31:42 enigmatic-temple-38800 app/web.1: D, [2018-12-27T22:31:42.091018 #4] DEBUG -- : [f80358c4-cf90-4004-86c0-4389c9fbc264] CACHE Location Load (0.0ms) SELECT "locations".* FROM "locations" INNER JOIN "locations_users" ON "locations"."id" = "locations_users"."location_id" WHERE "locations_users"."user_id" = $1 AND "locations"."id" = $2 LIMIT $3 [["user_id", 9], ["id", 3], ["LIMIT", 1]]
Dec 27 14:32:12 enigmatic-temple-38800 heroku/router: at=error code=H12 desc="Request timeout" method=GET path="/jobs?type=list" host=se.desotomatrix.com request_id=f80358c4-cf90-4004-86c0-4389c9fbc264 fwd="76.107.177.174" dyno=web.1 connect=1ms service=30000ms status=503 bytes=0 protocol=https
Dec 27 14:32:48 enigmatic-temple-38800 app/web.1: D, [2018-12-27T22:32:47.950721 #4] DEBUG -- : [f80358c4-cf90-4004-86c0-4389c9fbc264] Job Load (65853.3ms) SELECT "jobs".* FROM "jobs" WHERE "jobs"."location_id" = $1 AND "jobs"."complete" = $2 ORDER BY "jobs"."start" DESC [["location_id", 3], ["complete", "f"]]
Dec 27 14:32:48 enigmatic-temple-38800 app/web.1: D, [2018-12-27T22:32:47.980830 #4] DEBUG -- : [f80358c4-cf90-4004-86c0-4389c9fbc264]
Customer Load (4.4ms) SELECT "customers".* FROM "customers" WHERE "customers"."id" IN (4441, 4907, 4912, 4598, 4925, 4909, 4497, 4579, 4772, 4470, 4469, 4506, 4778, 4487, 4543, 4491, 4542, 4771, 4479, 4445, 4577, 4868, 4703, 4283, 4587, 4910, 4570, 4379, 4591, 4481, 4558, 4460, 4583, 4492, 4393, 4399, 4483, 4557, 4564, 4924, 4406, 4519, 4387, 4467, 4547, 4545, 4905, 4490, 4867, 4285, 4443, 4402, 4830, 4853, 4854, 4838, 4503, 4864, 4568, 4601, 4573, 4388, 4300, 4468, 4303, 4433, 4781, 4758, 4692, 4400, 4561, 4509, 4390, 4773, 4299, 4649, 4767, 4546, 4296, 4755, 4380, 4751, 4446, 4501, 4749, 4428, 4294, 4559, 4571, 4463, 4682, 4404, 4421, 4677, 4667, 4495, 4657, 4521, 4539, 4396)
Dec 27 14:32:48 enigmatic-temple-38800 app/web.1: D, [2018-12-27T22:32:47.997759 #4] DEBUG -- : [f80358c4-cf90-4004-86c0-4389c9fbc264] Job Load (4.0ms) SELECT "jobs".* FROM "jobs" WHERE "jobs"."location_id" = $1 AND "jobs"."complete" = $2 ORDER BY "jobs"."start" DESC LIMIT $3 OFFSET $4 [["location_id", 3], ["complete", "f"], ["LIMIT", 20], ["OFFSET", 0]]
Dec 27 14:32:48 enigmatic-temple-38800 app/web.1: D, [2018-12-27T22:32:48.005336 #4] DEBUG -- : [f80358c4-cf90-4004-86c0-4389c9fbc264]
Customer Load (1.9ms) SELECT "customers".* FROM "customers" WHERE "customers"."id" IN (4441, 4907, 4912, 4598, 4925, 4909, 4497, 4579, 4772, 4470, 4469, 4778, 4506, 4487, 4491, 4543, 4542, 4771, 4479)
Dec 27 14:32:48 enigmatic-temple-38800 app/web.1: I, [2018-12-27T22:32:48.011759 #4] INFO -- : [f80358c4-cf90-4004-86c0-4389c9fbc264] Rendering jobs/list.html.erb within layouts/application
Dec 27 14:32:48 enigmatic-temple-38800 app/web.1: D, [2018-12-27T22:32:48.016673 #4] DEBUG -- : [f80358c4-cf90-4004-86c0-4389c9fbc264] CACHE Location Load (0.0ms) SELECT "locations".* FROM "locations" INNER JOIN "locations_users" ON "locations"."id" = "locations_users"."location_id" WHERE "locations_users"."user_id" = $1 AND "locations"."id" = $2 LIMIT $3 [["user_id", 9], ["id", 3], ["LIMIT", 1]]
Dec 27 14:32:48 enigmatic-temple-38800 app/web.1: D, [2018-12-27T22:32:48.018493 #4] DEBUG -- : [f80358c4-cf90-4004-86c0-4389c9fbc264] CACHE Location Load (0.0ms) SELECT "locations".* FROM "locations" INNER JOIN "locations_users" ON "locations"."id" = "locations_users"."location_id" WHERE "locations_users"."user_id" = $1 AND "locations"."id" = $2 LIMIT $3 [["user_id", 9], ["id", 3], ["LIMIT", 1]]
Dec 27 14:32:48 enigmatic-temple-38800 app/web.1: D, [2018-12-27T22:32:48.023237 #4] DEBUG -- : [f80358c4-cf90-4004-86c0-4389c9fbc264] User Load (2.0ms) SELECT "users".* FROM "users" INNER JOIN "locations_users" ON "users"."id" = "locations_users"."user_id" WHERE "locations_users"."location_id" = $1 ORDER BY "users"."active" DESC, "users"."first_name" ASC, "users"."last_name" ASC [["location_id", 3]]
Dec 27 14:32:48 enigmatic-temple-38800 app/web.1: D, [2018-12-27T22:32:48.029189 #4] DEBUG -- : [f80358c4-cf90-4004-86c0-4389c9fbc264] CACHE Job Load (0.0ms) SELECT "jobs".* FROM "jobs" WHERE "jobs"."location_id" = $1 AND "jobs"."complete" = $2 ORDER BY "jobs"."start" DESC LIMIT $3 OFFSET $4 [["location_id", 3], ["complete", "f"], ["LIMIT", 20], ["OFFSET", 0]]
Dec 27 14:32:48 enigmatic-temple-38800 app/web.1: D, [2018-12-27T22:32:48.034066 #4] DEBUG -- : [f80358c4-cf90-4004-86c0-4389c9fbc264] CACHE Customer Load (0.0ms) SELECT "customers".* FROM "customers" WHERE "customers"."id" IN (4441, 4907, 4912, 4598, 4925, 4909, 4497, 4579, 4772, 4470, 4469, 4778, 4506, 4487, 4491, 4543, 4542, 4771, 4479)
Dec 27 14:32:48 enigmatic-temple-38800 app/web.1: D, [2018-12-27T22:32:48.045456 #4] DEBUG -- : [f80358c4-cf90-4004-86c0-4389c9fbc264] User Load (2.7ms) SELECT "users".* FROM "users" INNER JOIN "jobs_users" ON "users"."id" = "jobs_users"."user_id" WHERE "jobs_users"."job_id" = $1 [["job_id", 4489]]
Dec 27 14:32:48 enigmatic-temple-38800 app/web.1: D, [2018-12-27T22:32:48.051725 #4] DEBUG -- : [f80358c4-cf90-4004-86c0-4389c9fbc264] User Load (2.5ms) SELECT "users".* FROM "users" INNER JOIN "jobs_users" ON "users"."id" = "jobs_users"."user_id" WHERE "jobs_users"."job_id" = $1 [["job_id", 4356]]
Dec 27 14:32:48 enigmatic-temple-38800 app/web.1: D, [2018-12-27T22:32:48.057895 #4] DEBUG -- : [f80358c4-cf90-4004-86c0-4389c9fbc264] User Load (2.6ms) SELECT "users".* FROM "users" INNER JOIN "jobs_users" ON "users"."id" = "jobs_users"."user_id" WHERE "jobs_users"."job_id" = $1 [["job_id", 4385]]
Dec 27 14:32:48 enigmatic-temple-38800 app/web.1: D, [2018-12-27T22:32:48.063389 #4] DEBUG -- : [f80358c4-cf90-4004-86c0-4389c9fbc264] User Load (2.2ms) SELECT "users".* FROM "users" INNER JOIN "jobs_users" ON "users"."id" = "jobs_users"."user_id" WHERE "jobs_users"."job_id" = $1 [["job_id", 4435]]
Dec 27 14:32:48 enigmatic-temple-38800 app/web.1: D, [2018-12-27T22:32:48.069918 #4] DEBUG -- : [f80358c4-cf90-4004-86c0-4389c9fbc264] User Load (2.5ms) SELECT "users".* FROM "users" INNER JOIN "jobs_users" ON "users"."id" = "jobs_users"."user_id" WHERE "jobs_users"."job_id" = $1 [["job_id", 4522]]
Dec 27 14:32:48 enigmatic-temple-38800 app/web.1: D, [2018-12-27T22:32:48.079469 #4] DEBUG -- : [f80358c4-cf90-4004-86c0-4389c9fbc264] User Load (6.0ms) SELECT "users".* FROM "users" INNER JOIN "jobs_users" ON "users"."id" = "jobs_users"."user_id" WHERE "jobs_users"."job_id" = $1 [["job_id", 4339]]
Dec 27 14:32:48 enigmatic-temple-38800 app/web.1: D, [2018-12-27T22:32:48.085798 #4] DEBUG -- : [f80358c4-cf90-4004-86c0-4389c9fbc264] User Load (2.7ms) SELECT "users".* FROM "users" INNER JOIN "jobs_users" ON "users"."id" = "jobs_users"."user_id" WHERE "jobs_users"."job_id" = $1 [["job_id", 3750]]
Dec 27 14:32:48 enigmatic-temple-38800 app/web.1: D, [2018-12-27T22:32:48.098776 #4] DEBUG -- : [f80358c4-cf90-4004-86c0-4389c9fbc264] User Load (8.5ms) SELECT "users".* FROM "users" INNER JOIN "jobs_users" ON "users"."id" = "jobs_users"."user_id" WHERE "jobs_users"."job_id" = $1 [["job_id", 3054]]
Dec 27 14:32:48 enigmatic-temple-38800 app/web.1: D, [2018-12-27T22:32:48.107149 #4] DEBUG -- : [f80358c4-cf90-4004-86c0-4389c9fbc264] User Load (2.2ms) SELECT "users".* FROM "users" INNER JOIN "jobs_users" ON "users"."id" = "jobs_users"."user_id" WHERE "jobs_users"."job_id" = $1 [["job_id", 3760]]
Dec 27 14:32:48 enigmatic-temple-38800 app/web.1: D, [2018-12-27T22:32:48.112650 #4] DEBUG -- : [f80358c4-cf90-4004-86c0-4389c9fbc264] User Load (2.2ms) SELECT "users".* FROM "users" INNER JOIN "jobs_users" ON "users"."id" = "jobs_users"."user_id" WHERE "jobs_users"."job_id" = $1 [["job_id", 3861]]
Dec 27 14:32:48 enigmatic-temple-38800 app/web.1: D, [2018-12-27T22:32:48.118784 #4] DEBUG -- : [f80358c4-cf90-4004-86c0-4389c9fbc264] User Load (2.1ms) SELECT "users".* FROM "users" INNER JOIN "jobs_users" ON "users"."id" = "jobs_users"."user_id" WHERE "jobs_users"."job_id" = $1 [["job_id", 3860]]
Dec 27 14:32:48 enigmatic-temple-38800 app/web.1: D, [2018-12-27T22:32:48.124535 #4] DEBUG -- : [f80358c4-cf90-4004-86c0-4389c9fbc264] User Load (2.5ms) SELECT "users".* FROM "users" INNER JOIN "jobs_users" ON "users"."id" = "jobs_users"."user_id" WHERE "jobs_users"."job_id" = $1 [["job_id", 3841]]
Dec 27 14:32:48 enigmatic-temple-38800 app/web.1: D, [2018-12-27T22:32:48.133110 #4] DEBUG -- : [f80358c4-cf90-4004-86c0-4389c9fbc264] User Load (2.3ms) SELECT "users".* FROM "users" INNER JOIN "jobs_users" ON "users"."id" = "jobs_users"."user_id" WHERE "jobs_users"."job_id" = $1 [["job_id", 3859]]
Dec 27 14:32:48 enigmatic-temple-38800 app/web.1: D, [2018-12-27T22:32:48.138101 #4] DEBUG -- : [f80358c4-cf90-4004-86c0-4389c9fbc264] User Load (1.7ms) SELECT "users".* FROM "users" INNER JOIN "jobs_users" ON "users"."id" = "jobs_users"."user_id" WHERE "jobs_users"."job_id" = $1
[["job_id", 3824]]
Dec 27 14:32:48 enigmatic-temple-38800 app/web.1: D, [2018-12-27T22:32:48.143769 #4] DEBUG -- : [f80358c4-cf90-4004-86c0-4389c9fbc264] User Load (1.7ms) SELECT "users".* FROM "users" INNER JOIN "jobs_users" ON "users"."id" = "jobs_users"."user_id" WHERE "jobs_users"."job_id" = $1 [["job_id", 3963]]
Dec 27 14:32:48 enigmatic-temple-38800 app/web.1: D, [2018-12-27T22:32:48.149058 #4] DEBUG -- : [f80358c4-cf90-4004-86c0-4389c9fbc264] User Load (2.4ms) SELECT "users".* FROM "users" INNER JOIN "jobs_users" ON "users"."id" = "jobs_users"."user_id" WHERE "jobs_users"."job_id" = $1 [["job_id", 3948]]
Dec 27 14:32:48 enigmatic-temple-38800 app/web.1: D, [2018-12-27T22:32:48.154318 #4] DEBUG -- : [f80358c4-cf90-4004-86c0-4389c9fbc264] User Load (2.0ms) SELECT "users".* FROM "users" INNER JOIN "jobs_users" ON "users"."id" = "jobs_users"."user_id" WHERE "jobs_users"."job_id" = $1 [["job_id", 3947]]
Dec 27 14:32:48 enigmatic-temple-38800 app/web.1: D, [2018-12-27T22:32:48.159597 #4] DEBUG -- : [f80358c4-cf90-4004-86c0-4389c9fbc264] User Load (2.1ms) SELECT "users".* FROM "users" INNER JOIN "jobs_users" ON "users"."id" = "jobs_users"."user_id" WHERE "jobs_users"."job_id" = $1 [["job_id", 3754]]
Dec 27 14:32:48 enigmatic-temple-38800 app/web.1: D, [2018-12-27T22:32:48.164560 #4] DEBUG -- : [f80358c4-cf90-4004-86c0-4389c9fbc264] User Load (1.9ms) SELECT "users".* FROM "users" INNER JOIN "jobs_users" ON "users"."id" = "jobs_users"."user_id" WHERE "jobs_users"."job_id" = $1 [["job_id", 4486]]
Dec 27 14:32:48 enigmatic-temple-38800 app/web.1: D, [2018-12-27T22:32:48.171196 #4] DEBUG -- : [f80358c4-cf90-4004-86c0-4389c9fbc264] User Load (3.5ms) SELECT "users".* FROM "users" INNER JOIN "jobs_users" ON "users"."id" = "jobs_users"."user_id" WHERE "jobs_users"."job_id" = $1 [["job_id", 4498]]
Dec 27 14:32:48 enigmatic-temple-38800 app/web.1: D, [2018-12-27T22:32:48.176346 #4] DEBUG -- : [f80358c4-cf90-4004-86c0-4389c9fbc264] (2.2ms) SELECT COUNT(*) FROM "jobs" WHERE "jobs"."location_id" = $1 AND "jobs"."complete" = $2 [["location_id", 3], ["complete", "f"]]
Dec 27 14:32:48 enigmatic-temple-38800 app/web.1: I, [2018-12-27T22:32:48.181498 #4] INFO -- : [f80358c4-cf90-4004-86c0-4389c9fbc264] Rendered jobs/list.html.erb within layouts/application (169.6ms)
Dec 27 14:32:48 enigmatic-temple-38800 app/web.1: D, [2018-12-27T22:32:48.186723 #4] DEBUG -- : [f80358c4-cf90-4004-86c0-4389c9fbc264] CACHE Location Load (0.0ms) SELECT "locations".* FROM "locations" INNER JOIN "locations_users" ON "locations"."id" = "locations_users"."location_id" WHERE "locations_users"."user_id" = $1 AND "locations"."id" = $2 LIMIT $3 [["user_id", 9], ["id", 3], ["LIMIT", 1]]
Dec 27 14:32:48 enigmatic-temple-38800 app/web.1: D, [2018-12-27T22:32:48.190361 #4] DEBUG -- : [f80358c4-cf90-4004-86c0-4389c9fbc264] Location Load (1.3ms) SELECT "locations".* FROM "locations" INNER JOIN "locations_users" ON "locations"."id" = "locations_users"."location_id" WHERE "locations_users"."user_id" = $1 [["user_id", 9]]
Dec 27 14:32:48 enigmatic-temple-38800 app/web.1: D, [2018-12-27T22:32:48.193899 #4] DEBUG -- : [f80358c4-cf90-4004-86c0-4389c9fbc264] Account Load (1.3ms) SELECT "accounts".* FROM "accounts" WHERE "accounts"."id" = $1 LIMIT $2 [["id", 2], ["LIMIT", 1]]
Dec 27 14:32:48 enigmatic-temple-38800 app/web.1: D, [2018-12-27T22:32:48.197861 #4] DEBUG -- : [f80358c4-cf90-4004-86c0-4389c9fbc264] (1.5ms) SELECT COUNT(*) FROM "notifications" WHERE "notifications"."notifiable_id" = $1 AND "notifications"."notifiable_type" = $2 [["notifiable_id", 2], ["notifiable_type", "Account"]]
Dec 27 14:32:48 enigmatic-temple-38800 app/web.1: I, [2018-12-27T22:32:48.199790 #4] INFO -- : [f80358c4-cf90-4004-86c0-4389c9fbc264] Rendered layouts/_nav.html.erb (16.5ms)
Dec 27 14:32:48 enigmatic-temple-38800 app/web.1: I, [2018-12-27T22:32:48.200925 #4] INFO -- : [f80358c4-cf90-4004-86c0-4389c9fbc264] Rendered layouts/_flash_messages.html.erb (0.1ms)
Dec 27 14:32:48 enigmatic-temple-38800 app/web.1: I, [2018-12-27T22:32:48.201976 #4] INFO -- : [f80358c4-cf90-4004-86c0-4389c9fbc264] Completed 200 OK in 66135ms (Views: 128.1ms | ActiveRecord: 65933.7ms | Solr: 0.0ms)