![]() Because of the potential for a lot of outstanding writes when using synchronous=0, other I/O on your system will slow down as the pending writes are interleaved.Restore the sqlite database files backup if the OS shutdown abnormally.Exit hydrus normally and let the OS flush disk caches (either by letting the system run/"idle" for a while, running sync on *NIX systems, or normal shutdown), or.After running with synchronization set to zero you must either:.If you turn synchronization to 0 you are gambling, but it is a safe gamble if you have a backup and know exactly what you are doing.SSDs are 10-100x as slow as memory, and HDDs are 1000-10000x as slow as memory. It is always more expensive to access the disk than doing things in memory.It is nearly always safe to use -db_synchronous_override=1 on any modern filesystem and this is the default.This is a tutorial for advanced users who have read and understood this document and the risk/recovery procedure. ![]() Tuning your database synchronization using the -db_synchronous_override=0 launch argument can make Hydrus significantly faster with some caveats. Understanding Database Synchronization Options ΒΆ ![]()
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