On a memory system，the logical memory space available to the program istotally independent of the physical memory space.

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SQL Error: select id,body,options from ***_enewstiku where sourceid='30254' and id < 2447501 and id<>'2447501' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku where sourceid='30254' and id > 2447501 and id<>'2447501' order by id asc limit 5