2GB is really very low for the webserver if you're running apache in
pre-fork mode. Considering you also need memory for the filestore
(whether local or as a nfs client), you need at least a 8GB machine for
the webserver. We've been able to do about 800 users on 8GB but that's
pushing the limit.
Shanti
William Voorsluys wrote:
Hello Akara,
I fixed the MySQL problem and the database loading process is very fast now.
Your report looks very good, except for the misc stats. You can certainly
scale much higher than 100 concurrent users.
Surprisingly, I'm unable to scale much higher than 100 users. Although
it seems that dealing with 100 users is piece of cake, 150 seems to be
too many.
AddPerson and AddEvent fail constantly.
AddPerson 2.301 10.731 4.200 3.000 FAILED
AddEvent 1.878 9.532 4.220 4.000 FAILED
I tried several different configurations, such as moving the database
and filestore to local disk instead of NSF; using a second machine for
MySQL only; and increasing the number of driver machines.
The bottleneck seems to be the web server/PHP itself. This machine has
got 2GB of memory and I haven't observed high memory and CPU
utilization in it. The ops/sec metric seems to be limited to around
29 in all configurations.
Is there a precise way of identifying the bottleneck from the report?
Best,
William
