Lal Bagh 2013 – Photos from Flower show on 15 Aug 2013

Its again that time of the year, when visiting Lal Bagh ( Bangalore , India) is so much fun. There is a lot of crowd and there are lot of opportunities for photography. So, here are some of the photos 😉

DSC_1427

For more, visit my Flickr profile.

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vmstat – what it is and how to use?

Paging on 386 - address translation (polish texts)
Image via Wikipedia

vmstat provides a summary of various functions within the system, including system wide free memory, paging counters, summarized disk activity, system calls and cpu utilization.

The output of vmstat and description of what each field means:

The first line of output from vmstat shows a summary since boot,
followed by the output over the last 3 seconds for each additional line.

The vmstat command reports the amount of swap space that is free (not reserved or allocated). This is the most useful measure.
Swap space is reserved first, then may be allocated. When a process requests memory via malloc() for example, the address space is created, but real pages are not allocated to it. At this point, swap space is reserved, but not allocated. The first time each page is accessed, a real page of memory is allocated to it and swap space is also allocated.

The vmstat paging counters provide us with some insight as to how busy VM system is, and if there are any memory resource issues.
The first thing to look for in the paging counters is the scan rate. The scan rate is the number of pages per second that the pageout scanner is scanning. If the scan rate is consistently zero, then the pageout scanner is not running, and there must be greater than lotsfree free memory. If the scan rate is zero, then there is no memory shortage. A non-zero scan rate does not always mean there is cause for concern. Remember that as reads and writes occur, pages are taken from the free list and eventually the amount of free memory will fall below lotsfree. In this case, the pageout scanner will be invoked to free up memory, hence a non-zero scan rate.

 

 

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Photography – Stock photos on bigstock.

Couple of days back, one of my friends suggested that I put my photos on bigstock also along with my site at http://shop.amit-agarwal.co.in . I thought, let me give it a try and created a account on bigstock. After creating the account, I have so far submitted 5 images and four of them got rejected.

The rejections did not de-motivate me, in-fact this has taught me a lot of things. Some things that I did not know before I submitted my photos there. So, I am going through a new learning and this has cost me 80% rejection in bigstock. I am trying with few more photos in next few days and probably I will get a better idea of what is required in the photos. Hope to get the tricks of the trade soon. BTW, another way you can help me keep this blog alive is by buying my photos cheap at bigstock and here is the link to my photo :

Butterfly Photo

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