Reply to Why is DCUM always down lately?

Forum Index » Website Feedback

Reply to "Why is DCUM always down lately?"

Subject:

Emoticons





More smilies

Text Color: Font: Close Marks

[quote=Anonymous][quote=jsteele]I haven't identified the root of the problem. We have a software stack that has apache web server on the front end, Tomcat application server in the middle, mysql database server also in the middle, and then a mysql ndb cluster on the backend. We have two nodes of all of this which are load balanced.

There have been problems at almost every level except with Apache. Tomcat used up all of its connections to mysql, so I increased the number. Ndb didn't have enough memory, so I gave it more. Then, the servers started running out of memory. I have two more servers ordered that will be here next week. I will separate some cluster components so the memory requirement per server will go down. I think that will fix it.

What I haven't been able to identify is what is causing the increased load that is behind all of this. It could simply be increased usage of DCUM. I have gathered a ton of debugging data, but it is really too much to be able to analyze. During a rather short outage yesterday, I had 50,000 lines of access logs to dig through trying to find a culprit that was generating the traffic. I didn't find anything unusual [b](other than DCUM appears to be very popular with the Dept. of Education[/b]).
[/quote]

Really?  Meaning that there are a lot of hits from users from DOE?  Interesting.[/quote]

Options

	Disable HTML in this message
	Disable BB Code in this message
	Disable smilies in this message

Review message

Search Recent Topics Hottest Topics