Oren Eini

aka Ayende Rahien

Oren Eini

CEO of RavenDB

a NoSQL Open Source Document Database

Get in touch with me:

oren@ravendb.net

+972 52-548-6969

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RavenDB Workshops - Deep dive into practical use of Document Data Modeling

Jun 20 2007

Exceptions Usability

time to read 1 min | 161 words

I just made a small change to the EnsureMaxNumberOfQueriesPerRequestModule, when it detects that the amount of queries performed goes beyond the specified value, it would also include the queries that it detected in the exception message. Very minor change, but the affect is that I can just scroll the page and say: "Oh, I have a SELECT N+1 here", directly off the exception page.

On a side note, I am getting better at optimizing NHibernate based application, and I strongly suggest anyone using NHibernate to look at Multi Query in 1.2 (and Multi Criteria on the trunk) for those kind of things. It give you quite a bit of power.

I run into several places today that we would read & write large amount of data on a single request, and that triggered the max query limit. It took a while, but some interesting usage of both batching & multi queries dropped the database roundtrips by an order of magnitude. Nice.

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RECENT COMMENTS

Dmitry, Yes, but this is _known_ to be a 64 bits system - since we are allocating 3GB (not possible in 64 bits). Note t...

By Oren Eini on Answer: What does this code do?
That's why it is a good idea to compare the return value of `write` to the buffer size. "size_t" can be 32-bit on some system...

By Dmitry on Answer: What does this code do?
There's a reason we miss `write_exact` and `read_exact` from the standard library. In fact, I am surprised the chunk is actua...

By Pyth0n on Challenge: What does this code do?
kpvleeuwen, I agree, unfortunately I don't have anyone to ask off the top of my head. Thanks, I fixed the headers.

By Oren Eini on Performance discovery: IOPS vs. IOPS
It could be interesting to reach out to storage firmware developers and ask what write patterns they think would be useful ex...

By kpvleeuwen on Performance discovery: IOPS vs. IOPS

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