Rainbows! Rack HTTP server user/dev discussion
 help / color / mirror / code / Atom feed
From: Eric Wong <normalperson-rMlxZR9MS24@public.gmane.org>
To: Rainbows! list <rainbows-talk-GrnCvJ7WPxnNLxjTenLetw@public.gmane.org>
Subject: Re: How to manage growing memory with Rainbows!
Date: Thu, 14 Feb 2013 20:28:28 +0000	[thread overview]
Message-ID: <20130214202828.GB23895@dcvr.yhbt.net> (raw)
In-Reply-To: <F6728D3D-3E35-488B-8165-EB80E25FFF1B-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>

Claudio Poli <claudio-3HQ/CcOImoi171pxa8y+qA@public.gmane.org> wrote:
> I have few more questions before definitely make the switch if you don't mind.
> 
> ActiveRecord/Redis.
> This is the configuration I'm trying out in staging: http://pastie.org/private/zepmdeduvlrvtdkc32unnq
> 
> Is there something special that should I know about AR connection pool and Rainbows! + Threadpool? My pool in database.yml is 30.

As long as your database can handle the number of connections you have,
you're probably fine.  Keep in mind you'll have 30 connections
per-process (not per-thread), so take that into account if you need to
change the process count or start an upgrade with SIGUSR2.

> After a small load test currently I'm sitting around 60/80 connections, which is kinda expected given that also Sidekiq is in action.
> 
> I don't like the global $redis connection. Can you, or anyone else, offer any advice how to improve that, if you use it in your projects?
> The goal was to keep a connection alive in a single process due to the sheer number of commands that can be put in redis as consequence of actions, but now that I'm using threads it probably needs to be changed.
> The cost however for opening a new connection seems high, I was reading this: https://groups.google.com/forum/?fromgroups=#!topic/redis-db/xcz5MXykXdk

I have no experience using Redis, but I know it's a TCP-based service.

The easiest might be a Thread-local connection with ThreadPool:

  def redis
    Thread.current[:my_app_redis] ||= Redis.new(url: url)
  end

This won't work well for ThreadSpawn.
_______________________________________________
Rainbows! mailing list - rainbows-talk-GrnCvJ7WPxnNLxjTenLetw@public.gmane.org
http://rubyforge.org/mailman/listinfo/rainbows-talk
Do not quote signatures (like this one) or top post when replying


      parent reply	other threads:[~2013-02-14 20:28 UTC|newest]

Thread overview: 6+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2013-02-12  4:19 How to manage growing memory with Rainbows! Claudio Poli
     [not found] ` <E326380F-0B96-4B17-B721-DB814415E03E-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
2013-02-12  5:00   ` Eric Wong
     [not found]     ` <20130212050021.GA18443-yBiyF41qdooeIZ0/mPfg9Q@public.gmane.org>
2013-02-14  6:58       ` Claudio Poli
     [not found]         ` <B3ED3231-62E8-4FF5-A65A-859AFD790C2B-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
2013-02-14  7:15           ` Eric Wong
     [not found]             ` <20130214071512.GA10890-yBiyF41qdooeIZ0/mPfg9Q@public.gmane.org>
2013-02-14  8:49               ` Claudio Poli
     [not found]                 ` <F6728D3D-3E35-488B-8165-EB80E25FFF1B-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
2013-02-14 20:28                   ` Eric Wong [this message]

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

  List information: https://yhbt.net/rainbows/

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to=20130214202828.GB23895@dcvr.yhbt.net \
    --to=normalperson-rmlxzr9ms24@public.gmane.org \
    --cc=rainbows-talk-GrnCvJ7WPxnNLxjTenLetw@public.gmane.org \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line before the message body.
Code repositories for project(s) associated with this public inbox

	https://yhbt.net/rainbows.git/

This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for read-only IMAP folder(s) and NNTP newsgroup(s).