632   u8 memDb;                   /* True to inhibit all file I/O */  member
779 # define MEMDB pPager->memDb
1027       , (int)p->tempFile, (int)p->memDb, (int)p->useJournal  in print_pager_state()
3718   if( (pPager->memDb==0 || pPager->dbSize==0)  in sqlite3PagerSetPagesize()
4681   int memDb = 0;           /* True if this is an in-memory file */  in sqlite3PagerOpen()  local
4707     memDb = 1;  in sqlite3PagerOpen()
4886     assert( !memDb );  in sqlite3PagerOpen()
4956     assert( pPager->memDb==0 );  in sqlite3PagerOpen()
4965     rc = sqlite3PcacheOpen(szPageDflt, nExtra, !memDb,  in sqlite3PagerOpen()
4966                        !memDb?pagerStress:0, (void *)pPager, pPager->pPCache);  in sqlite3PagerOpen()
4997   pPager->memDb = (u8)memDb;  in sqlite3PagerOpen()
5021   }else if( memDb || memJM ){  in sqlite3PagerOpen()
7012   return (nullIfMemDb && pPager->memDb) ? &zFake[4] : pPager->zFilename;  in sqlite3PagerFilename()
7224   assert( pPg->nRef>0 || pPg->pPager->memDb );  in sqlite3PagerGetData()