[sqlite] How to modify page_size

[Jim Wang]

hi,all
     How could I modify the page_size of the Data base? I use the following 
method, but could not change the page_size.
      nRet = sqlite3_exec(m_pDB, "PRAGMA page_size=8192;", 0,0,&pzErrMsg);
     Why?

     best regards.
        Jim Wang.