[Zope] Zope scalabilty and problems

[Chris McDonough]

Your "tranaaction blocked" error messages seem to imply that either or
both of the following is true:

- some transactions are taking a "long time"
  (any more than, say, 200 milliseconds is a long time)

- you have a very high transaction volume.

That said, these messages are informational rather than signifying an
error condition.  Some transaction blockage is expected since the ZEO
server can only deal with one transaction at a time.

What version of Zope are you using?

Is this an "intranet" application?  Are there lots of users creating
content?  Can you venture a guess as to how many users are "creating"
content vs. "viewing" content at any given time?  Are the users that are
creating content logged in?  The users that are viewing content?

On Wed, 2005-08-31 at 11:03 -0500, Kennamore, Matthew G [NTK] wrote:
> Here is our situation, we originally launched zope with a small user
> base in mind and like most IT implementations it got away from us
> quickly and we have over 1000 users now.  We are experiencing huge
> slowdowns and lots of complaints of performance.
> 
> Let me outline our system:
> 
> I have a load balancer that round robins incoming request to 3 zeo
> servers
> 
> I have 1 zope server on the back en that severs the data, this is a
> large single processor machine with 4 gigs of ram
> 
> Each zeo server is 2 gigs of ram, single processor 3.2 gighz
> 
> The throughput doesn’t appear to be the problem as ram/processors are.
> 
> Short term I plan to change all zeo’s to 4 gigs ram and add 3
> additional servers.
> 
> 
> The Technologies we are using are Zope, Zeo, plone and so forth.  Why
> are we having these large issues?  I see sites with hundreds of
> thousands of users and they don’t seem to have these issues?  We plan
> to recode our site to get away from the Data.fs as soon as we can but
> that is a ways off yet.  What am I doing wrong can anyone help?
> 
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