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Could not update my site

Hi ALL,

Had a very hard time last week, my phone crashed, my laptop hardisk crashed and was loaded with work.

For this reason I was not able to reply to anyone's comments or update my site with latest information. I should be able to do this in a day or two as I have got hold of a spare laptop. Still waiting for the data from my old hard disk to be recovered.

Mithun

Comments

ABHISHEK ANAND said…
sir,
can you explain once the difference between master and child table.
Mithun Ashok said…
Hi Abhishek,

If a table has a foreign key from another table then this table is called as Child table and the table which is referred is called as Master table.

Regards,
Mithun
niharika said…
hi sir
wish u a very happy teacher's day.......
Mithun Ashok said…
Hi Niharika,

Thank you for your wishes.

:-)
Mithun
Anonymous said…
sir m a bce2 batch student as manual is gng on and v r giving presentations m not able to do sql properly...will it b fine if i give 1 whole sunday for sql?will i b able to make it 4 interviews?sir u hav teached us splendidly and m feeling m loosing d grip nw...
Mithun Ashok said…
Hi Anonymous,

As long as you are practicing it does not matter if you are working only on sunday or any other day. I would suggest you to brush through the concepts on a regular basis atleast once in 2 days, And practice sql hands on.

Regards,
Mithun

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Parameters to check for this are shmall.

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$cat /proc/sys/kernel/shmmax
53687091200

$ getconf PAGE_SIZE
4096

As per Oracle SHMALL should be set to the total amount of physical RAM divided by page size.

Our system has 64GB memory, so change kernel.shmall = 1024 * 1024 * 1024 * 64 / 4096 = 16777216


Once this value is calculated you can modify Linux system configuration file directly.

$ su - root
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and

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Once this is done the database was started without any problem.