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Excessive size growth of postfix package

(23 posts) (4 voices)

• Started 9 years ago by Filou
• Latest reply from Aleksej
• This topic is not resolved

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1. 

   Filou
   

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   While setting up a tiny mailserver with a couple of packages incl. postfix I recognized a massive growth of the resulting packed image after upgrade.

   I could identify the package causing this growth, which is postfix.

   During the last upgrade in (the same) Version number 2.10.2, the postfix files in /usr/sbin as well as the files in /usr/lib/postfix grew in size by a factor of 7 to 13 (from about 100-300k to between 1.3 and 1.7 M) for about 40 single files keeping the same names and structure.

   I guess that this should not be by intent.

   Did anybody else experience this problem?

   Attachments

   1. postfix_after_update.txt (3 KB, 573 downloads) 9 years old
   2. postfix_before_update.txt (3.2 KB, 635 downloads) 9 years old

   Posted 9 years ago #
2. 

   llev
   

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   Hi,

   The only relevant recent change is this: http://hg.slitaz.org/wok/rev/c8f848a49bc1 , but I don't see why linking to a shared lib would grow an executable this much. Pascal?

   Posted 9 years ago #
3. 

   Bellard
   

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   Key Master

   Hi,

   Regarding the BUILD_DEPENDS:
   openssl; http://hg.slitaz.org/wok/rev/f45ab85f7718

   Posted 9 years ago #
4. 

   llev
   

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   Oh, I'm sorry if this change of mine is the culprit, and I don't understand why:
   - a change of patchlevel normally doesn't change the API,
   - dynamically linked objects do not include the library contents,
   - so even if openssl grew, why would postfix do the same?

   Posted 9 years ago #
5. 

   Bellard
   

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   I mean that we must not search in postfix receipt only.
   But in every package in BUILD_DEPENDS, their DEPENDS, cookutils...

   Posted 9 years ago #
6. 

   llev
   

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   Member

   Hi Filou,

   Do yo know approximately when postfix was small for the last time? That would help spotting the problem.

   Posted 9 years ago #
7. 

   Filou
   

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   Hi everyone,

   I set up my server on 19th of december 2015. The file sizes I attached in my first post ("before update") were from that date. Upgrading to the latest build of the same postfix version leads to the second version ("after update").

   The change must have taken place in the meantime.

   Posted 9 years ago #
8. 

   llev
   

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   Member

   Found this, maybe:
   http://hg.slitaz.org/wok/rev/24033cc7961e
   (edit: saw your post. This change was done in october, so it's not the culprit)
   It turns out package db-dev provides only static libraries:
   http://cook.slitaz.org/cooker.cgi?files=db-dev
   shared ones are in libdb.
   But if I remove libdb*a files, postfix fails to compile with:
   /usr/bin/ld: cannot find -ldb
   although I installed shared libs. (Not sure I did this right though; I just added rm /usr/lib/libdb*a in compile_rules().)

   Posted 9 years ago #
9. 

   llev
   

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   Compiling with -DNO_DB makes the programs smaller but still much bigger than expected (~500KB). So we have to search further...

   Posted 9 years ago #
10. 

    llev
    

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    I have good and bad news!

    Good news: I think I found the problem, it is related to http://hg.slitaz.org/wok/rev/c8f848a49bc1, because if I compile without -lpthread it results in the small binaries.

    Bad news: to be able to test-compile without pthread, I have to remove -ldb and DB support, because libdb depends on libpthread! So I don't know how to solve the problem.

    Pascal, do you remember why you added -lpthread? Because the build of postfix was broken?

    Posted 9 years ago #
11. 

    Aleksej
    

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    Coder-hobbyist

    Hi Lucas,

    Excuse my little side note. This may be related: http://www.postfix.org/DB_README.html#pthread

    Posted 9 years ago #
12. 

    llev
    

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    Aleksej, you're welcome! What I don't understand is that the version of db has not changed, and Filou had a postfix version linked to this version, before Pascal added the link to pthread. So, postfix must have been successfully compiled with libdb and without libpthread, but how?

    Posted 9 years ago #
13. 

    Aleksej
    

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    Lucas, I don't understand too much in the compilation. It seems like all the postfix binaries contain some static library (*.a) instead of using shared (*.so). That's all what I can suggest.

    Output for the shared libraries:
    

    ldd /usr/sbin/postfix 
    
    /usr/sbin/postfix:
    	linux-gate.so.1 =>  (0xffffe000)
    	libldap-2.4.so.2 => /usr/lib/libldap-2.4.so.2 (0xb76a9000)
    	liblber-2.4.so.2 => /usr/lib/liblber-2.4.so.2 (0xb769d000)
    	libsasl2.so.2 => /usr/lib/libsasl2.so.2 (0xb7686000)
    	libssl.so.1.0.0 => /usr/lib/libssl.so.1.0.0 (0xb7618000)
    	libcrypto.so.1.0.0 => /usr/lib/libcrypto.so.1.0.0 (0xb7435000)
    	libpthread.so.0 => /lib/libpthread.so.0 (0xb741a000)
    	libmysqlclient.so.18 => /usr/lib/libmysqlclient.so.18 (0xb7150000)
    	libz.so.1 => /usr/lib/libz.so.1 (0xb713d000)
    	libm.so.6 => /lib/libm.so.6 (0xb7110000)
    	libpcre.so.1 => /usr/lib/libpcre.so.1 (0xb70d6000)
    	libnsl.so.1 => /lib/libnsl.so.1 (0xb70ba000)
    	libresolv.so.2 => /lib/libresolv.so.2 (0xb70a1000)
    	libc.so.6 => /lib/libc.so.6 (0xb6f2b000)
    	libdl.so.2 => /lib/libdl.so.2 (0xb6f26000)
    	/lib/ld-linux.so.2 (0xb76e8000)
    	librt.so.1 => /lib/librt.so.1 (0xb6f1d000)
    	libstdc++.so.6 => /usr/lib/libstdc++.so.6 (0xb6e55000)
    	libgcc_s.so.1 => /usr/lib/libgcc_s.so.1 (0xb6e3d000)

    So, seems problem not in the libpthread?
    Or, may it be "hybrid" case, when some part of postfix use static libpthread, while other is depends on shared libpthread? I have very weak skills, and in the most cases can only use "trial and error" method.

    Posted 9 years ago #
14. 

    Bellard
    

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    Key Master

    @llev:
    postfix has been built without pthread 2 months ago... and can't build without now. I don't know why.

    Posted 9 years ago #
15. 

    Filou
    

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    Moderator

    I used the ldd command to check again for changes. Here they are:
    - libpthread.so was in the libraries before and after the update,
    - libdb.so has vanished
    - libpam.so was added.

    Is this of any help?!?

    Attachments

    1. ldd_postfix_after_update.txt (1.1 KB, 550 downloads) 9 years old
    2. ldd_postfix_before_update.txt (1.1 KB, 539 downloads) 9 years old

    Posted 9 years ago #

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