Support » Plugins » W3 Total Cache Compression and Expires Headers

  • I configured W3 Total Cache and managed to speed up my blog considerably due to page cache and CDN. However, in spite of enabling the option, gzip compression and expires headers are not working. I found this with YSlow and confirmed it with (My blog is at

    When I do compatibility check, it says that following are not found. I checked with my hosting service (fatcow) and they say these are installed correctly on web server.
    mod_mime: Not detected
    mod_expires: Not detected
    mod_deflate / mod_gzip: Not detected
    mod_headers: Not detected
    mod_env: Not detected
    mod_setenvif: Not detected
    mod_rewrite: Not detected

    Any clues what might be going on?


    The rest of the compatibility check is.

    HP Version: 5.2.12
    PHP Timezone: OK
    Web Server: Apache
    FTP functions: OK (required for Self-hosted (FTP) CDN support)
    Multibyte String support: OK (required for Rackspace Cloud Files support)
    cURL extension: OK (required for Amazon S3 support)
    zlib extension: OK (required for compression support)
    Opcode cache: Not installed
    Memcache extension: Not installed
    Mime type detection: Not installed
    Hash function: hash (required for NetDNA purge support)
    Safe mode: Off
    Open basedir: Off
    zlib output compression: Off

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