Thanks a lot Kamil. The timeout trick worked :-). I guess I can keep my old sqlite, its working great now.
-Manish On 6/20/07, Kamil Skalski <[EMAIL PROTECTED]> wrote:
> I had opened up a single connection, and was doing updates/selects through > that. I ended up with "library sequence out of error" exceptions. So, I I do this by caching one connection per thread. > modified the code such that each query will open up new connection, and then > run itself. So, "library sequence" exceptions went away, but got overtaken > by "database locked" ones. So, to do synchronization at the application Try specifying the Timeout for the connection. I set it to 30seconds, which is enough for my application. I don't know any other solution for this issue - probably the best would be to set timeout to infinite, which I will do by increasing the actual value when needed ;) def conn = SqliteConnection ($"URI=file://$path,Version=3,busy_timeout=30000"); (this works with the old provider) > level, I've set the C# locking mechanism to such that > 1. each table only runs one query at a time, and > 2. only one write query is being run at a time. > > However, all this has done is just to _reduce_ the number of database locked I think you cannot even do concurrent reads or maybe there is some place you missed in locking, I'm not sure. > exceptions. I'm still getting them. Is there a way by which they can be > eliminated? Mono database page shows that we can use the new library > System.Data.Sqlite, which is version 3 and apparently doesn't have these > synchronization issues. However, I've been unable to find the .dll for > linux. Any help is appreciated. > I think I found them at http://www.go-mono.com/download-stable/sles-9-i586/ or maybe I just compiled them from source... it's quite easy. However I experienced a strange (dead) locking issues using the new provider, which the same code works fine with old provider. I still don't have time to investigate, but it would be great if somebody else having concurrent app with sqlite tested it with new provider :D -- Kamil Skalski http://nazgul.omega.pl
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