Geekzone: technology news, blogs, forums
Guest
Welcome Guest.
You haven't logged in yet. If you don't have an account you can register now.



1112 posts

Uber Geek
+1 received by user: 89


Topic # 138110 20-Dec-2013 00:08 Send private message

Hey Guys,

Develop a booking systems for niche markets.  I have one such marked that uses it very - vigorously.

They have been doing their annual bookings for the new year and suddenly I have 15,000 rows from a specific table dissapear.

The CPU was running high 100% for 2 day during peak times, could has have been the cause?  I have checked re-chekkd there is no other obvious cause!

Things in my mind I have been through

SQL injection, its very unlikely as always sanetize the code.  Also the table names are not obvious, and we are missing random amounts during a time i know the cpu was 100% for hours.
Bad code - this was my first though, and I have checked and check fory any DELETE, REPLACE even UPDATE on the table

Anybody got some thoughts,

I am running xt-small-RDS by Amazon AWS.  It was on a micro server but I have upgraded it and recoded to keep CPU below 50% now sits camly at 2-7%

Create new topic
7897 posts

Uber Geek
+1 received by user: 668

Trusted
Subscriber

  Reply # 955212 20-Dec-2013 06:54 Send private message

I'd be very surprised if high CPU could make database row disappear. That's about the last place I'd look. Bugs, SQL injection, etc. Do you have logs of the SQL executed? Backups?




Amazon & TOGAF certified solution architect
Professional photographer



1112 posts

Uber Geek
+1 received by user: 89


  Reply # 955244 20-Dec-2013 07:58 Send private message

Backups yes, log no, turning it on now, need to upgrade to 5.6 for RDS.

It is a rather large table, 70,000 records, still somewhat confused!

The search continues! Will be going through more application code, but nothing is jumping out.

Create new topic




Twitter »
Follow us to receive Twitter updates when new discussions are posted in our forums:



Follow us to receive Twitter updates when news items and blogs are posted in our frontpage:



Follow us to receive Twitter updates when tech item prices are listed in our price comparison site:





Trending now »

Hot discussions in our forums right now:

Customs wanting power to force travellers to handover passwords and encryption keys
Created by nedkelly, last reply by Mattmannz on 6-Mar-2015 18:34 (41 replies)
Pages... 2 3


Considering Snap - do you rate them?
Created by gsmithnz, last reply by deadlyllama on 5-Mar-2015 22:15 (38 replies)
Pages... 2 3


Whats your USB charging solution?
Created by macuser, last reply by Journeyman on 4-Mar-2015 17:52 (37 replies)
Pages... 2 3


Galaxy s6 announcement and owners thread
Created by Shoes2468, last reply by richms on 6-Mar-2015 18:36 (105 replies)
Pages... 5 6 7


Privacy concerns on returning faulty microSDXC
Created by dpw, last reply by andrewbnz on 3-Mar-2015 22:41 (34 replies)
Pages... 2 3


Recommendations for store bought gaming hard drive for $1500
Created by DebP, last reply by Lias on 6-Mar-2015 15:32 (31 replies)
Pages... 2 3


Why does Lightbox have a suicide wish?
Created by dafman, last reply by MikeAqua on 6-Mar-2015 11:44 (110 replies)
Pages... 6 7 8


Metservice website suffers under stress.
Created by surfisup1000, last reply by surfisup1000 on 6-Mar-2015 15:29 (14 replies)


Geekzone Live »

Try automatic live updates from Geekzone directly in your browser, without refreshing the page, with Geekzone Live now.

Are you subscribed to our RSS feed? You can download the latest headlines and summaries from our stories directly to your computer or smartphone by using a feed reader.

Alternatively, you can receive a daily email with Geekzone updates.