我已经在我的服务器上安装了 sphinx 来尝试一下。我设置了一个简单的搜索源，运行indexer一次，效果很好。然后我停止了 sphinx 进程，它现在已经有几个星期没有运行了：
user@server ~ $ ps aux | grep sphinx
user 5919 0.0 0.0 13584 920 pts/5 S+ 12:07 0:00 grep --colour=auto sphinx
user@server ~ $ ps aux | grep index
user 5921 0.0 0.0 13584 916 pts/5 S+ 12:07 0:00 grep --colour=auto index
user@server ~ $ ps aux | grep search
user 5925 0.0 0.0 13584 916 pts/5 S+ 12:07 0:00 grep --colour=auto search
但是昨天我注意到我的 mysql 数据库服务器上的内存使用量异常大。在show processlist;我看到我在 sphinx 源代码中编写的一个查询：SELECT id, content FROM articles.
如果 sphinx 停止，为什么会发生这种情况？如何阻止 sphinx 执行查询？
我的 spinx.conf：
#
# Sphinx configuration file sample
#
# WARNING! While this sample file mentions all available options,
# it contains (very) short helper descriptions only. Please refer to
# doc/sphinx.html for details.
#
#############################################################################
## data source definition
#############################################################################
source src1
{
# data source type. mandatory, no default value
# known types are mysql, pgsql, mssql, xmlpipe, xmlpipe2, odbc
type = mysql
#####################################################################
## SQL settings (for 'mysql' and 'pgsql' types)
#####################################################################
# some straightforward parameters for SQL source types
sql_host = 85.254.49.181
sql_user = root
sql_pass = #########
sql_db = articles_db
sql_port = 3306 # optional, default is 3306
# UNIX socket name
# optional, default is empty (reuse client library defaults)
# usually '/var/lib/mysql/mysql.sock' on Linux
# usually '/tmp/mysql.sock' on FreeBSD
#
# sql_sock = /tmp/mysql.sock
# MySQL specific client connection flags
# optional, default is 0
#
# mysql_connect_flags = 32 # enable compression
# MySQL specific SSL certificate settings
# optional, defaults are empty
#
# mysql_ssl_cert = /etc/ssl/client-cert.pem
# mysql_ssl_key = /etc/ssl/client-key.pem
# mysql_ssl_ca = /etc/ssl/cacert.pem
# MS SQL specific Windows authentication mode flag
# MUST be in sync with charset_type index-level setting
# optional, default is 0
#
# mssql_winauth = 1 # use currently logged on user credentials
# MS SQL specific Unicode indexing flag
# optional, default is 0 (request SBCS data)
#
# mssql_unicode = 1 # request Unicode data from server
# ODBC specific DSN (data source name)
# mandatory for odbc source type, no default value
#
# odbc_dsn = DBQ=C:\data;DefaultDir=C:\data;Driver={Microsoft Text Driver (*.txt; *.csv)};
# sql_query = SELECT id, data FROM documents.csv
# pre-query, executed before the main fetch query
# multi-value, optional, default is empty list of queries
#
sql_query_pre = SET NAMES utf8
# sql_query_pre = SET SESSION query_cache_type=OFF
# main document fetch query
# mandatory, integer document ID field MUST be the first selected column
sql_query = \
SELECT id, content \
FROM articles
# range query setup, query that must return min and max ID values
# optional, default is empty
#
# sql_query will need to reference $start and $end boundaries
# if using ranged query:
#
# sql_query = \
# SELECT doc.id, doc.id AS group, doc.title, doc.data \
# FROM documents doc \
# WHERE id>=$start AND id<=$end
#
# sql_query_range = SELECT MIN(id),MAX(id) FROM documents
# range query step
# optional, default is 1024
#
# sql_range_step = 1000
# unsigned integer attribute declaration
# multi-value (an arbitrary number of attributes is allowed), optional
# optional bit size can be specified, default is 32
#
# sql_attr_uint = author_id
# sql_attr_uint = forum_id:9 # 9 bits for forum_id
#sql_attr_uint = id
# boolean attribute declaration
# multi-value (an arbitrary number of attributes is allowed), optional
# equivalent to sql_attr_uint with 1-bit size
#
# sql_attr_bool = is_deleted
# bigint attribute declaration
# multi-value (an arbitrary number of attributes is allowed), optional
# declares a signed (unlike uint!) 64-bit attribute
#
# sql_attr_bigint = my_bigint_id
# UNIX timestamp attribute declaration
# multi-value (an arbitrary number of attributes is allowed), optional
# similar to integer, but can also be used in date functions
#
# sql_attr_timestamp = posted_ts
# sql_attr_timestamp = last_edited_ts
#sql_attr_timestamp = date_added
# string ordinal attribute declaration
# multi-value (an arbitrary number of attributes is allowed), optional
# sorts strings (bytewise), and stores their indexes in the sorted list
# sorting by this attr is equivalent to sorting by the original strings
#
# sql_attr_str2ordinal = author_name
# floating point attribute declaration
# multi-value (an arbitrary number of attributes is allowed), optional
# values are stored in single precision, 32-bit IEEE 754 format
#
# sql_attr_float = lat_radians
# sql_attr_float = long_radians
# multi-valued attribute (MVA) attribute declaration
# multi-value (an arbitrary number of attributes is allowed), optional
# MVA values are variable length lists of unsigned 32-bit integers
#
# syntax is ATTR-TYPE ATTR-NAME 'from' SOURCE-TYPE [;QUERY] [;RANGE-QUERY]
# ATTR-TYPE is 'uint' or 'timestamp'
# SOURCE-TYPE is 'field', 'query', or 'ranged-query'
# QUERY is SQL query used to fetch all ( docid, attrvalue ) pairs
# RANGE-QUERY is SQL query used to fetch min and max ID values, similar to 'sql_query_range'
#
# sql_attr_multi = uint tag from query; SELECT id, tag FROM tags
# sql_attr_multi = uint tag from ranged-query; \
# SELECT id, tag FROM tags WHERE id>=$start AND id<=$end; \
# SELECT MIN(id), MAX(id) FROM tags
# post-query, executed on sql_query completion
# optional, default is empty
#
# sql_query_post =
# post-index-query, executed on successful indexing completion
# optional, default is empty
# $maxid expands to max document ID actually fetched from DB
#
# sql_query_post_index = REPLACE INTO counters ( id, val ) \
# VALUES ( 'max_indexed_id', $maxid )
# ranged query throttling, in milliseconds
# optional, default is 0 which means no delay
# enforces given delay before each query step
sql_ranged_throttle = 0
# document info query, ONLY for CLI search (ie. testing and debugging)
# optional, default is empty
# must contain $id macro and must fetch the document by that id
sql_query_info = SELECT * FROM articles WHERE id=$id
# kill-list query, fetches the document IDs for kill-list
# k-list will suppress matches from preceding indexes in the same query
# optional, default is empty
#
# sql_query_killlist = SELECT id FROM documents WHERE edited>=@last_reindex
# columns to unpack on indexer side when indexing
# multi-value, optional, default is empty list
#
# unpack_zlib = zlib_column
# unpack_mysqlcompress = compressed_column
# unpack_mysqlcompress = compressed_column_2
# maximum unpacked length allowed in MySQL COMPRESS() unpacker
# optional, default is 16M
#
# unpack_mysqlcompress_maxsize = 16M
#####################################################################
## xmlpipe settings
#####################################################################
# type = xmlpipe
# shell command to invoke xmlpipe stream producer
# mandatory
#
# xmlpipe_command = cat /var/lib/sphinxsearch/test.xml
#####################################################################
## xmlpipe2 settings
#####################################################################
# type = xmlpipe2
# xmlpipe_command = cat /var/lib/sphinxsearch/test2.xml
# xmlpipe2 field declaration
# multi-value, optional, default is empty
#
# xmlpipe_field = subject
# xmlpipe_field = content
# xmlpipe2 attribute declaration
# multi-value, optional, default is empty
# all xmlpipe_attr_XXX options are fully similar to sql_attr_XXX
#
# xmlpipe_attr_timestamp = published
# xmlpipe_attr_uint = author_id
# perform UTF-8 validation, and filter out incorrect codes
# avoids XML parser choking on non-UTF-8 documents
# optional, default is 0
#
# xmlpipe_fixup_utf8 = 1
}
# inherited source example
#
# all the parameters are copied from the parent source,
# and may then be overridden in this source definition
source src1throttled : src1
{
sql_ranged_throttle = 100
}
#############################################################################
## index definition
#############################################################################
# local index example
#
# this is an index which is stored locally in the filesystem
#
# all indexing-time options (such as morphology and charsets)
# are configured per local index
index articles
{
# document source(s) to index
# multi-value, mandatory
# document IDs must be globally unique across all sources
source = src1
# index files path and file name, without extension
# mandatory, path must be writable, extensions will be auto-appended
path = /var/lib/sphinxsearch/data/parts
# document attribute values (docinfo) storage mode
# optional, default is 'extern'
# known values are 'none', 'extern' and 'inline'
docinfo = extern
# memory locking for cached data (.spa and .spi), to prevent swapping
# optional, default is 0 (do not mlock)
# requires searchd to be run from root
mlock = 0
# a list of morphology preprocessors to apply
# optional, default is empty
#
# builtin preprocessors are 'none', 'stem_en', 'stem_ru', 'stem_enru',
# 'soundex', and 'metaphone'; additional preprocessors available from
# libstemmer are 'libstemmer_XXX', where XXX is algorithm code
# (see libstemmer_c/libstemmer/modules.txt)
#
# morphology = stem_en, stem_ru, soundex
# morphology = libstemmer_german
# morphology = libstemmer_sv
morphology = stem_ru
# minimum word length at which to enable stemming
# optional, default is 1 (stem everything)
#
# min_stemming_len = 1
# stopword files list (space separated)
# optional, default is empty
# contents are plain text, charset_table and stemming are both applied
#
# stopwords = /var/lib/sphinxsearch/data/stopwords.txt
# wordforms file, in "mapfrom > mapto" plain text format
# optional, default is empty
#
# wordforms = /var/lib/sphinxsearch/data/wordforms.txt
# tokenizing exceptions file
# optional, default is empty
#
# plain text, case sensitive, space insensitive in map-from part
# one "Map Several Words => ToASingleOne" entry per line
#
# exceptions = /var/lib/sphinxsearch/data/exceptions.txt
# minimum indexed word length
# default is 1 (index everything)
min_word_len = 1
# charset encoding type
# optional, default is 'sbcs'
# known types are 'sbcs' (Single Byte CharSet) and 'utf-8'
charset_type = utf-8
# charset definition and case folding rules "table"
# optional, default value depends on charset_type
#
# defaults are configured to include English and Russian characters only
# you need to change the table to include additional ones
# this behavior MAY change in future versions
#
# 'sbcs' default value is
# charset_table = 0..9, A..Z->a..z, _, a..z, U+A8->U+B8, U+B8, U+C0..U+DF->U+E0..U+FF, U+E0..U+FF
#
# 'utf-8' default value is
# charset_table = 0..9, A..Z->a..z, _, a..z, U+410..U+42F->U+430..U+44F, U+430..U+44F
# ignored characters list
# optional, default value is empty
#
# ignore_chars = U+00AD
# minimum word prefix length to index
# optional, default is 0 (do not index prefixes)
#
# min_prefix_len = 0
# minimum word infix length to index
# optional, default is 0 (do not index infixes)
#
# min_infix_len = 0
# list of fields to limit prefix/infix indexing to
# optional, default value is empty (index all fields in prefix/infix mode)
#
# prefix_fields = filename
# infix_fields = url, domain
# enable star-syntax (wildcards) when searching prefix/infix indexes
# known values are 0 and 1
# optional, default is 0 (do not use wildcard syntax)
#
# enable_star = 1
# n-gram length to index, for CJK indexing
# only supports 0 and 1 for now, other lengths to be implemented
# optional, default is 0 (disable n-grams)
#
# ngram_len = 1
# n-gram characters list, for CJK indexing
# optional, default is empty
#
# ngram_chars = U+3000..U+2FA1F
# phrase boundary characters list
# optional, default is empty
#
# phrase_boundary = ., ?, !, U+2026 # horizontal ellipsis
# phrase boundary word position increment
# optional, default is 0
#
# phrase_boundary_step = 100
# whether to strip HTML tags from incoming documents
# known values are 0 (do not strip) and 1 (do strip)
# optional, default is 0
html_strip = 0
# what HTML attributes to index if stripping HTML
# optional, default is empty (do not index anything)
#
# html_index_attrs = img=alt,title; a=title;
# what HTML elements contents to strip
# optional, default is empty (do not strip element contents)
#
# html_remove_elements = style, script
# whether to preopen index data files on startup
# optional, default is 0 (do not preopen), searchd-only
#
# preopen = 1
# whether to keep dictionary (.spi) on disk, or cache it in RAM
# optional, default is 0 (cache in RAM), searchd-only
#
# ondisk_dict = 1
# whether to enable in-place inversion (2x less disk, 90-95% speed)
# optional, default is 0 (use separate temporary files), indexer-only
#
# inplace_enable = 1
# in-place fine-tuning options
# optional, defaults are listed below
#
# inplace_hit_gap = 0 # preallocated hitlist gap size
# inplace_docinfo_gap = 0 # preallocated docinfo gap size
# inplace_reloc_factor = 0.1 # relocation buffer size within arena
# inplace_write_factor = 0.1 # write buffer size within arena
# whether to index original keywords along with stemmed versions
# enables "=exactform" operator to work
# optional, default is 0
#
# index_exact_words = 1
# position increment on overshort (less that min_word_len) words
# optional, allowed values are 0 and 1, default is 1
#
# overshort_step = 1
# position increment on stopword
# optional, allowed values are 0 and 1, default is 1
#
# stopword_step = 1
}
# inherited index example
#
# all the parameters are copied from the parent index,
# and may then be overridden in this index definition
#index test1stemmed : test1
#{
# path = /var/lib/sphinxsearch/data/test1stemmed
# morphology = stem_en
#}
# distributed index example
#
# this is a virtual index which can NOT be directly indexed,
# and only contains references to other local and/or remote indexes
############################################################################
## indexer settings
#############################################################################
indexer
{
# memory limit, in bytes, kiloytes (16384K) or megabytes (256M)
# optional, default is 32M, max is 2047M, recommended is 256M to 1024M
mem_limit = 32M
# 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 = 1048576
# maximum xmlpipe2 field length, bytes
# optional, default is 2M
#
# max_xmlpipe2_field = 4M
# write buffer size, bytes
# several (currently up to 4) buffers will be allocated
# write buffers are allocated in addition to mem_limit
# optional, default is 1M
#
# write_buffer = 1M
}
#############################################################################
## searchd settings
#############################################################################
searchd
{
# hostname, port, or hostname:port, or /unix/socket/path to listen on
# multi-value, multiple listen points are allowed
# optional, default is 0.0.0.0:9312 (listen on all interfaces, port 9312)
#
#listen = localhost:9312
#listen = 0.0.0.0:9306:mysql41
# listen = 192.168.0.1:9312
# listen = 9312
# listen = /var/run/searchd.sock
listen = 0.0.0.0:9306:mysql41
# log file, searchd run info is logged here
# optional, default is 'searchd.log'
log = /var/log/sphinxsearch/searchd.log
# query log file, all search queries are logged here
# optional, default is empty (do not log queries)
query_log = /var/log/sphinxsearch/query.log
# client read timeout, seconds
# optional, default is 5
read_timeout = 5
# request timeout, seconds
# optional, default is 5 minutes
client_timeout = 300
# maximum amount of children to fork (concurrent searches to run)
# optional, default is 0 (unlimited)
max_children = 30
# PID file, searchd process ID file name
# mandatory
pid_file = /var/run/sphinxsearch/searchd.pid
# max amount of matches the daemon ever keeps in RAM, per-index
# WARNING, THERE'S ALSO PER-QUERY LIMIT, SEE SetLimits() API CALL
# default is 1000 (just like Google)
max_matches = 1000
# 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
# attribute updates periodic flush timeout, seconds
# updates will be automatically dumped to disk this frequently
# optional, default is 0 (disable periodic flush)
#
# attr_flush_period = 900
# instance-wide ondisk_dict defaults (per-index value take precedence)
# optional, default is 0 (precache all dictionaries in RAM)
#
# ondisk_dict_default = 1
# MVA updates pool size
# shared between all instances of searchd, disables attr flushes!
# optional, default size is 1M
mva_updates_pool = 1M
# max allowed network packet size
# limits both query packets from clients, and responses from agents
# optional, default size is 8M
max_packet_size = 8M
# crash log path
# searchd will (try to) log crashed query to 'crash_log_path.PID' file
# optional, default is empty (do not create crash logs)
#
# crash_log_path = /var/log/sphinxsearch/crash
# max allowed per-query filter count
# optional, default is 256
max_filters = 256
# max allowed per-filter values count
# optional, default is 4096
max_filter_values = 4096
# socket listen queue length
# optional, default is 5
#
# listen_backlog = 5
# per-keyword read buffer size
# optional, default is 256K
#
# read_buffer = 256K
# unhinted read size (currently used when reading hits)
# optional, default is 32K
#
# read_unhinted = 32K
}
# --eof--