原因
logstash 自带分页查询,竟然是查处所有数据再计数的。
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| SELECT count(*) AS `count` FROM (SELECT * FROM ip_bundle_data_20190813) AS `t1` LIMIT 1
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解决办法：修改源码
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| logstash-7.2.0\vendor\bundle\jruby\2.5.0\gems\logstash-input-jdbc-4.3.13\lib\logstash\plugin_mixins\jdbc\jdbc.rb
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// line:100 => config
# 开启子查询分页 @boole 2018-03-30
config :subquery_paging_enabled, :validate => :boolean, :default => false
# 总数sql，结果集列名为sum。for example `select count(*) as sum from goods` @boole 2018-03-30
config :sum_statement, :validate => :string
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// line:254 => perform_query
private
def perform_query(query)
#subquery paging @boole 2018-03-30
if @subquery_paging_enabled
@logger.info("################### subquery paging optimization ################")
data_sum = @database[@sum_statement].get(:sum)
@logger.info("data_sum=#{data_sum}")
data_offset = 0
while data_offset < data_sum do
@logger.info("data_offset=#{data_offset}")
sub_page_query = @database[@statement, symbolized_params({"data_offset" => data_offset, "jdbc_page_size" => @jdbc_page_size})]
sub_page_query.each do |row|
yield row
end
data_offset += @jdbc_page_size
end
elsif @jdbc_paging_enabled
query.each_page(@jdbc_page_size) do |paged_dataset|
paged_dataset.each do |row|
yield row
end
end
else
query.each do |row|
yield row
end
end
end
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sql中使用:data_offset和:jdbc_page_size进行分页
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| statement => "SELECT * FROM ip_bundle_data_20190813 limit :data_offset,:jdbc_page_size"
subquery_paging_enabled => "true"
sum_statement => "select count(*) as `count` from ip_bundle_data_20190813"
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