sphinx.conf

indexer
{
        # memory limit, in bytes, kiloytes (16384K) or megabytes (256M)
        # optional, default is 32M, max is 2047M, recommended is 256M to 1024M
        mem_limit               = 512M

        # maximum IO calls per second (for I/O throttling)
        # optional, default is 0 (unlimited)
        #
        # max_iops              = 40

        # maximum IO call size, bytes (for I/O throttling)
        # optional, default is 0 (unlimited)
        #
        max_iosize              = 524288
}

searchd
{

        listen                  = {{ sphinx_listen }}

        # required by RT-indexes
        workers                 = threads

        # log file, searchd run info is logged here
        # optional, default is 'searchd.log'
        log                     = /var/log/searchd.log

        # query log file, all search queries are logged here
        # optional, default is empty (do not log queries)
        query_log               = /var/log/query.log

        # client read timeout, seconds
        # optional, default is 5
        read_timeout    = 7

        # maximum amount of children to fork (concurrent searches to run)
        # optional, default is 0 (unlimited)
        max_children    = 4

        # PID file, searchd process ID file name
        # mandatory
        pid_file                = /etc/sphinxsearch/searchd.pid

        # seamless rotate, prevents rotate stalls if precaching huge datasets
        # optional, default is 1
        seamless_rotate = 1

        # whether to forcibly preopen all indexes on startup
        # optional, default is 0 (do not preopen)
        preopen_indexes = 0

        # whether to unlink .old index copies on succesful rotation.
        # optional, default is 1 (do unlink)
        unlink_old              = 1

        expansion_limit = 32
}