Posts Tagged ‘optimization’

29 Aug 2012
6

Notes Database Performance Tip: Optimize Document Table Map

Hi Everyone. In the past few days I’ve been asked to audit a few Notes Applications. Apart from the usual disabling of unread marks and removing views no longer used to increase performance, there is a very important setting on a Notes Database and can drastically reduce the indexing time of Notes Views.

It’s called “Optimize Document Table Map“.

Firstly, a quick scenario:

Let’s say you have a Notes Application that contains about 5 different Forms. For each form you have about 3 – 5 Notes Views. Also for each Form you have about 5000-10000 documents.

When it comes to indexing Views, if the property “Optimize Document Table Map” is not selected in the Notes Database Properties, the following happens:

When indexing a certain View,  Notes will search through all documents created from all 5 Forms in the Database to produce the result in the View. If you only have a few hundred documents in the database, then this is not an issue. However, 50 000 documents later this could lead to poor performance of your Views.

 

So, let’s say that you have “Optimize Document Table Map” selected in the Notes Database Properties, the following will happen:

When indexing a certain View, Notes will only search through all records in the Database that were created using the Form that’s specified in the View Selection Formula. This means that if you have 5 Forms in the Database, and 5 000 records for each Form, Notes will only search through 5 000 records for a specific Form to index the Notes View. Can you imagine the Response Time :)

 

So, where to enable this setting? If you right-click on your Notes Database and go to the “Database Properties”, click on the last tab. You will see towards the Top that you can check the option “Optimize Document Table Map

 

2 Important Notes when enabling this Setting:

1. I’ve had varied results with enabling this property and just expecting it to work. I highly recommend compacting the database after enabling this Setting just to be sure.

2. In order for this setting to Work, it’s very important that your View Selection Formula for your Notes View specifies the Form Name.

i.e. If your View Selection Formula only says Select FirstName = “John”, then you won’t see a performance boost on the view. However, if you say Select Form = “Person” & FirstName = “John”, this will work because you are referencing the Form Name inside the View, which if you think about it, makes sense.

 

I hope this helps everyone. Happy Coding :)

John

15 Mar 2012
2

Use YSlow to measure your Site’s performance and more

Hi Everyone.  Here’s a quick post that I’m sure will make all the difference in your Web Dev Life.

There is a Browser plug-in called YSlow. You can install it on Firefox, Chrome, Safari, Opera and more. I’m going to use the Firefox plug-in for this example.

NOTE: For Firefox, you need to install Firebug to use this plug-in, as it’s an extension to Firebug.

Once you’ve installed the Firebug and YSlow plug-in, and restarted your Browser, do the following:

1. Open your Website. In my example I’m using my XPages Showcase for this example.

2. Push F12 on your keyboard. This will open the Firebug Window at the bottom of the Browser.

3. Click on the YSlow Tab. You’ll see an introduction Page, and a button at the bottom that says “Run Test”. This takes about 2-5 seconds to run.

 

 

4. Once completed, YSlow returns a set of results. You’ll get an overall Grade with a Performance score. (Please don’t judge me for getting a C. YSlow’s moaning at me for not optimizing CSS and JS files,  but there’s a reason for that…)

5. If you take a look at the 3rd Red Arrow on the Image, you’ll see it’s pointing to the Ruleset List. This is pretty awesome, because you can set the rules and benchmark for how your site should be measured. There is a YSlow Add-On called Web Metrics Framework, which is a ruleset that measures your Website according to Google’s Standards.

6. If you go into each of the sections that’s returned….e.g. Content…..you’ll get a second set of Tabs that Score you according to individual operations….See image below.

 

 

7. YSlow also comes with quite a bit of useful Hints, Tips and supporting documentation.

This add-on is easy to navigate, and very very useful. I hope it helps. Thanks Yahoo.

 

Cheers for now.

John