Error on installing ruby with jemalloc

Question

I am on ubuntu 12.04.5 LTS and tried installing ruby with jemalloc. The jemalloc got installed successfully(https://blog.scalingo.com/2017/05/02/improve-ruby-application-memory-jemalloc.html) but while installing the ruby 2.3.4, it gave this following error.

>rvm install 2.3.4 -C --with-jemalloc

Warning, new version of rvm available '1.29.1', you are using older version '1.27.0'.
You can disable this warning with:    echo rvm_autoupdate_flag=0 >> ~/.rvmrc
You can enable  auto-update  with:    echo rvm_autoupdate_flag=2 >> ~/.rvmrc
ruby-2.3.4 - #removing src/ruby-2.3.4..
Checking requirements for ubuntu.
Requirements installation successful.
Installing Ruby from source to: /home/deploy/.rvm/rubies/ruby-2.3.4, this may take a while depending on your cpu(s)...
ruby-2.3.4 - #downloading ruby-2.3.4, this may take a while depending on your connection...
ruby-2.3.4 - #extracting ruby-2.3.4 to /home/deploy/.rvm/src/ruby-2.3.4....
ruby-2.3.4 - #configuring...........................................................
ruby-2.3.4 - #post-configuration..
ruby-2.3.4 - #compiling.....
Error running '__rvm_make -j2',
showing last 15 lines of /home/deploy/.rvm/log/1494486344_ruby-2.3.4/make.log
compiling enumerator.c
compiling error.c
compiling eval.c
eval.c: In function 'rb_raise_jump':
eval.c:763:8: warning: unused variable 'mid' [-Wunused-variable]
compiling load.c
compiling proc.c
compiling file.c
compiling gc.c
In file included from gc.c:50:0:
/usr/include/malloc.h:152:15: error: conflicting types for 'malloc_usable_size'
/usr/include/jemalloc/jemalloc.h:45:8: note: previous declaration of 'malloc_usable_size' was here
make: *** [gc.o] Error 1
make: *** Waiting for unfinished jobs....
++ return 2
There has been an error while running make. Halting the installation.

Has anyone encountered it before or may have the experience with it, please help.

Costrel

Got the same result with RUBY_CONFIGURE_OPTS=--with-jemalloc install 2.3.4 – Aperient

Answer 1

On [xK]ubuntu 18.10

I did

sudo apt install libjemalloc-dev
rvm install 2.5.2 -C --with-jemalloc
rvm use 2.5.2
ruby -r rbconfig -e "puts RbConfig::CONFIG['LIBS']"

Outrush

Apparently the last command does not check presence of jemalloc anymore. Suggested check is now MALLOC_CONF=stats_print:true ruby -e "exit" source – Biddick

Answer 2

I use Ubuntu 18.04. Change the command like this

RUBY_EXTRA_CONFIGURE_OPTIONS="--with-jemalloc" rvm install 2.3.4 --disable-binary

To check the jemalloc is installed, run the following command:

ruby -r rbconfig -e "puts RbConfig::CONFIG['LIBS']"

if the ruby is unrecognized after rvm is installed.

source ~/.rvm/scripts/rvm

When the jemalloc is called. You can see the response.

-lpthread -ljemalloc -ldl -lobjc

You can see the full documentation here

Glaze

I tried RUBY_EXTRA_CONFIGURE_OPTIONS="--with-jemalloc" several times without success, turns out the proposed version in the question worked just fine. I did it on Kubuntu 18.10 installing ruby 2.5.2 make sure you have sudo apt install libjemalloc-dev done first – Outrush

Answer 3

I ran across a variant of this issue when trying to get rails to use jemalloc. In my case I had (purposefully) installed system-wide rubies via rvm but forgotten to use rvmsudo like so:

$ sudo apt update; sudo apt install libjemalloc-dev -y
$ rvmsudo rvm reinstall 2.4.1 -C --with-jemalloc

If you're getting permissions warnings when trying to get jemalloc to work in an analogous scenario, give ^^^ a shot...

Northwester