Andrea Arcangeli <[EMAIL PROTECTED]> writes: > On Wed, Sep 27, 2000 at 10:11:43AM +0200, Christoph Rohland wrote: > > I just checked one oracle system and it did not lock the memory. And I > > If that memory is used for I/O cache then such memory should > released when the system runs into swap instead of swapping it out > too (otherwise it's not cache anymore and it could be slower than > re-reading from disk the real data in rawio). Yes, but how does the application detect that it should free the mem? Also you often have more overhead reading out of a database then having preprocessed data in swap. > > Customers with performance problems very often start with too little > > memory, but they cannot upgrade until this really big job finishes :-( > > > > Another issue about shm swapping is interactive transactions, where > > some users have very large contexts and go for a coffee before > > submitting. This memory can be swapped. > > Agreed, that's why I said shm performance under swap is very important > as well (I'm not understimating it). fine :-) Greetings Christoph - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [EMAIL PROTECTED] Please read the FAQ at http://www.tux.org/lkml/
- Re: [patch] vmfixes-2.4.0-test9-B2 - fixing deadlocks Andrea Arcangeli
- Re: [patch] vmfixes-2.4.0-test9-B2 - fixing deadlocks Rik van Riel
- Re: [patch] vmfixes-2.4.0-test9-B2 - fixing deadlocks Christoph Rohland
- Re: [patch] vmfixes-2.4.0-test9-B2 - fixing deadlocks Andrea Arcangeli
- Re: [patch] vmfixes-2.4.0-test9-B2 - fixing deadlocks Christoph Rohland
- Re: [patch] vmfixes-2.4.0-test9-B2 - fixing deadlocks Andrea Arcangeli
- Re: [patch] vmfixes-2.4.0-test9-B2 - fixing deadlocks Christoph Rohland
- Re: [patch] vmfixes-2.4.0-test9-B2 - fixing deadlocks Ingo Molnar
- Re: [patch] vmfixes-2.4.0-test9-B2 - fixing deadlocks Christoph Rohland
- Re: [patch] vmfixes-2.4.0-test9-B2 - fixing deadlocks Andrea Arcangeli
- Re: [patch] vmfixes-2.4.0-test9-B2 - fixing deadlocks Christoph Rohland
- Re: [patch] vmfixes-2.4.0-test9-B2 - fixing deadlocks Andrea Arcangeli
- Re: [patch] vmfixes-2.4.0-test9-B2 - fixing deadlocks Erik Andersen
- Re: [patch] vmfixes-2.4.0-test9-B2 - fixing deadlocks Andrea Arcangeli
- Re: [patch] vmfixes-2.4.0-test9-B2 - fixing deadlocks Rik van Riel
- Re: [patch] vmfixes-2.4.0-test9-B2 - fixing deadlocks Rik van Riel
- Re: [patch] vmfixes-2.4.0-test9-B2 - fixing deadlocks Andrea Arcangeli
- Re: [patch] vmfixes-2.4.0-test9-B2 - fixing deadlocks Rik van Riel
- Re: [patch] vmfixes-2.4.0-test9-B2 - fixing deadlocks Andrea Arcangeli
- Re: [patch] vmfixes-2.4.0-test9-B2 - fixing deadlocks Rik van Riel
- Re: [patch] vmfixes-2.4.0-test9-B2 - fixing deadlocks Ingo Molnar