PHP Curl when accessing SSL slows down connection. How to correct?

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2















After migrating to a new server, our scripts slowed down dramatically.



Some troubleshooting showed that the slowdown occurred during Curl connections as the server was trying to load the SSL cert. Results were the same regardless of which 3rd party site or API was being accessed.



This is on an Amazon EC2 Linux instance. The certificates were provided with the server. These same scripts worked fine on another server (which is no longer active)



However, now it would pause for 2-100 seconds before showing this in the verbose output:



 CAfile: /etc/pki/tls/certs/ca-bundle.crt
CApath: none
ALPN/NPN, server did not agree to a protocol


The speeds would get progressively slower as more curl requests were sent.



I then added curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, FALSE); and the problem went away! Speeds back to normal.



So, it seems something about how it reads the SSL cert is slowing it down as it tries to negotiate a protocol.



What would cause this?



Thank you










share|improve this question


























    2















    After migrating to a new server, our scripts slowed down dramatically.



    Some troubleshooting showed that the slowdown occurred during Curl connections as the server was trying to load the SSL cert. Results were the same regardless of which 3rd party site or API was being accessed.



    This is on an Amazon EC2 Linux instance. The certificates were provided with the server. These same scripts worked fine on another server (which is no longer active)



    However, now it would pause for 2-100 seconds before showing this in the verbose output:



     CAfile: /etc/pki/tls/certs/ca-bundle.crt
    CApath: none
    ALPN/NPN, server did not agree to a protocol


    The speeds would get progressively slower as more curl requests were sent.



    I then added curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, FALSE); and the problem went away! Speeds back to normal.



    So, it seems something about how it reads the SSL cert is slowing it down as it tries to negotiate a protocol.



    What would cause this?



    Thank you










    share|improve this question
























      2












      2








      2


      1






      After migrating to a new server, our scripts slowed down dramatically.



      Some troubleshooting showed that the slowdown occurred during Curl connections as the server was trying to load the SSL cert. Results were the same regardless of which 3rd party site or API was being accessed.



      This is on an Amazon EC2 Linux instance. The certificates were provided with the server. These same scripts worked fine on another server (which is no longer active)



      However, now it would pause for 2-100 seconds before showing this in the verbose output:



       CAfile: /etc/pki/tls/certs/ca-bundle.crt
      CApath: none
      ALPN/NPN, server did not agree to a protocol


      The speeds would get progressively slower as more curl requests were sent.



      I then added curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, FALSE); and the problem went away! Speeds back to normal.



      So, it seems something about how it reads the SSL cert is slowing it down as it tries to negotiate a protocol.



      What would cause this?



      Thank you










      share|improve this question














      After migrating to a new server, our scripts slowed down dramatically.



      Some troubleshooting showed that the slowdown occurred during Curl connections as the server was trying to load the SSL cert. Results were the same regardless of which 3rd party site or API was being accessed.



      This is on an Amazon EC2 Linux instance. The certificates were provided with the server. These same scripts worked fine on another server (which is no longer active)



      However, now it would pause for 2-100 seconds before showing this in the verbose output:



       CAfile: /etc/pki/tls/certs/ca-bundle.crt
      CApath: none
      ALPN/NPN, server did not agree to a protocol


      The speeds would get progressively slower as more curl requests were sent.



      I then added curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, FALSE); and the problem went away! Speeds back to normal.



      So, it seems something about how it reads the SSL cert is slowing it down as it tries to negotiate a protocol.



      What would cause this?



      Thank you







      linux php curl openssl aws






      share|improve this question













      share|improve this question











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      share|improve this question










      asked Jan 8 at 2:30









      user2029890user2029890

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