>To get clarity, are you saying the 33% speedup is the gain of the >non-Indexed vs. Indexed table, or due to setting that cache size on the >already in-memory DB? (The latter would be worrying).
Ryan, It seemed unaffected by cache size. The slight gain in speed (~0.2 secs) for the 2 million inserts was the result of having the full database in memory versus SSD based. There was almost no difference for the 111 million inserts. ________________________________ From: sqlite-users <sqlite-users-boun...@mailinglists.sqlite.org> on behalf of R Smith <rsm...@rsweb.co.za> Sent: Monday, December 18, 2017 3:19:31 PM To: sqlite-users@mailinglists.sqlite.org Subject: Re: [sqlite] What happens if an in memory database runs out of memory A big cache on an in-memory DB is a bit like insisting to sit inside a row-boat while on a big ship. It has zero effect in helping you float better - it's probably slightly worse even, considering the cache computation cycles could have been avoided. To get clarity, are you saying the 33% speedup is the gain of the non-Indexed vs. Indexed table, or due to setting that cache size on the already in-memory DB? (The latter would be worrying). On 2017/12/18 4:48 PM, curmudgeon wrote: > You're definitely right about me wasting my time Simon. I loaded my entire > database (1 GB) into memory and set cache_size = -8192 for an 8 GB cache > size (using win64). I then ran my test (inserting the results of a query, > returning 111 million bigints, into a non-indexed single column table) and > there was no real difference. For lesser inserts (2 million) the speedup was > around 33% but would hardly be noticeable to the end user. > > I daresay it would've been more noticeable if my laptop had a hard drive but > the moral of the story is get yourself an SSD and leave sqlite to take care > of the hard stuff. > > > > -- > Sent from: http://sqlite.1065341.n5.nabble.com/ > _______________________________________________ > sqlite-users mailing list > sqlite-users@mailinglists.sqlite.org > http://mailinglists.sqlite.org/cgi-bin/mailman/listinfo/sqlite-users _______________________________________________ sqlite-users mailing list sqlite-users@mailinglists.sqlite.org http://mailinglists.sqlite.org/cgi-bin/mailman/listinfo/sqlite-users _______________________________________________ sqlite-users mailing list sqlite-users@mailinglists.sqlite.org http://mailinglists.sqlite.org/cgi-bin/mailman/listinfo/sqlite-users
