12/23/2023 0 Comments Sqlite jdbc java![]() ![]() The one has the full DB as it was on disk now in memory, the other has an already in-memory DB with now the same tables from the on-disk database replicated to it.īoth require establishing a memory DB and copying data across. Yes, there is "any" difference, but it is slight and might not matter. if you test only with a couple operations the fetch from disk into memory will be a larger cost than the accumulated time for thousands of accesses of that data. SQLITE_THREADSAFE=0 disable memory locks (if you only use single threads)īut mostly the file system is cached anyway, between the OS caching the file and sqlite caching pages that are already loaded which if sqlite finds it in cache, it's approaching memory.SQLITE_ENABLE_LOCKING_STYLE=0 disable locks.Working that way is probably still like working with a file, there are a few things that can make files much faster if that's something the java connector gives you maybe? I don't know what method you used to get the mmap mode. ![]() TL DR just use the file having extra hoops is just going to cause future you to regret increasing the maintenance cost. Is this right way to load disk file to memory? If yes why can't I see spike in heap class RestoreService ", e.getMessage()) db file into memory, because after running this code when I check heap-memory using Jconsole there is no much spike in it, heap memory is increased by only 10-20 MB, but my. I'm using restore command to load my database file (.db) from disk to main memory using below codeīut looks like "restore" command is not fully loading. My use case is to run queries faster by loading SQLite into memory. Implementation group: 'org.xerial', name: 'sqlite-jdbc', version: '3.36.0.3' I'm working with SQLite in JAVA using JDBC driver ![]()
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