html_url,issue_url,id,node_id,user,user_label,created_at,updated_at,author_association,body,reactions,issue,issue_label,performed_via_github_app https://github.com/simonw/datasette/issues/1199#issuecomment-881932880,https://api.github.com/repos/simonw/datasette/issues/1199,881932880,IC_kwDOBm6k_c40kTpQ,9599,simonw,2021-07-17T17:39:17Z,2021-07-17T17:39:17Z,OWNER,"I asked about optimizing performance on the SQLite forum and this came up as a suggestion: https://sqlite.org/forum/forumpost/9a6b9ae8e2048c8b?t=c I can start by trying this: PRAGMA mmap_size=268435456;","{""total_count"": 0, ""+1"": 0, ""-1"": 0, ""laugh"": 0, ""hooray"": 0, ""confused"": 0, ""heart"": 0, ""rocket"": 0, ""eyes"": 0}",792652391,Experiment with PRAGMA mmap_size=N, https://github.com/simonw/datasette/issues/1199#issuecomment-766181628,https://api.github.com/repos/simonw/datasette/issues/1199,766181628,MDEyOklzc3VlQ29tbWVudDc2NjE4MTYyOA==,9599,simonw,2021-01-23T21:25:18Z,2021-01-23T21:25:18Z,OWNER,"Comment thread here: https://news.ycombinator.com/item?id=25881911 - cperciva says: > There's an even better reason for databases to not write to memory mapped pages: Pages get synched out to disk at the kernel's leisure. This can be ok for a cache but it's definitely not what you want for a database! But... Datasette is often used in read-only mode, so that disadvantage often doesn't apply.","{""total_count"": 0, ""+1"": 0, ""-1"": 0, ""laugh"": 0, ""hooray"": 0, ""confused"": 0, ""heart"": 0, ""rocket"": 0, ""eyes"": 0}",792652391,Experiment with PRAGMA mmap_size=N,