Re: [sqlite] PRAGMA optimize; == no busy handler?

From my personal experience, performance instability of SQLite queries (drastically jumping from milliseconds to seconds and back) that is fixable by running ANALYZE means that your queries are not optimal (some crucial indices are missing). The reason ANALYZE helps is because the info that

Re: [sqlite] PRAGMA optimize; == no busy handler?

>Don't do that Mostly sure, but there's some cases SQLite will skip the busyhandler and immediately return, but they're not permanently-busy conditions. We have multiple threads across multiple processes using the database > why you’re doing "PRAGMA optimize" while other parts of your program

Re: [sqlite] PRAGMA optimize; == no busy handler?

On 4 Oct 2017, at 2:23am, Howard Kapustein wrote: > What do you think of an option to only analyze tables that have grown from 0 > records to >0 e.g. PRAGMA optimize(0x10002) so 2=ANALYZE if beneficial and > 0x1=change the criteria from "increased by 25

[sqlite] pragma integrity_check throwing exception

Hi, Assume I have a database which is "malformed" due to rowid xxx missing from a table index. In the System.Data.SQLite.dll 1.0.80.0 C# driver the following code would return the reason, I would get a list of the rowid problems allowing me to log them. private static IEnumerable

Re: [sqlite] Tool for extracting deleted data from unvacuumed SQLite files

If you are not a developer you can avoid having the same problem again using Sqlite Recovery tool and recover deleted records from Sqlite database . It adds single-master replication to SQLite. -- Sent from:

Re: [sqlite] Tool for extracting deleted data from unvacuumed SQLite files

If you are not a developer you can avoid having the same problem again using Sqlite Recovery tool and recover deleted records from Sqlite database . It adds single-master replication to SQLite. -- Sent from:

[sqlite] PRAGMA optimize; == no busy handler?

Using SQLite 3.20.1 I notice a flood of log events sometimes when I call PRAGMA optimize; Warning 0x5: statement aborts at 1: [PRAGMA optimize;] database is locked And a few times Warning 0x5: statement aborts at 2: [PRAGMA optimize;] database is locked And even once Warning 0x5: statement

Re: [sqlite] Ordering a GROUP BY, or other concatenating tricks?

On 3 Oct 2017, at 11:13pm, Doug Nebeker wrote: > How can I select a document and get the complete sorted text back in a single > row (so I can do a JOIN on a different table with additional information)? There is a way which will probably work but the documentation

[sqlite] Ordering a GROUP BY, or other concatenating tricks?

Imagine a table that holds individual lines of text documents: CREATE TABLE DocLines ( DocID INTEGER, LineIndex INTEGER, LineText TEXT ); INSERT INTO DocLines (DocID, LineIndex, LineText) VALUES (1, 1, 'Mary had a little lamb'); INSERT INTO DocLines (DocID, LineIndex,

Re: [sqlite] PRAGMA optimize; == no busy handler?

On 4 Oct 2017, at 12:54am, Howard Kapustein wrote: > We use the default busy-handler w/timeout=250ms and call sqlite_exec("PRAGMA > optimize;") in a loop until success or non-busy/locked error or some ungodly > amount of time elapses (~5min). The logs indicate