Regarding the top output, the virtual memory is used for opened
libraries, plug-ins, bdb opened files, and possibly quite some non
shared anonymous blocks for all dynamic storage needed by the
application, a pmap -x <pid> can provide with some details.
On a side note, I have been using KVM as a host loaded with ram, running
Fedora with 10 to 20 guests running different operating systems, 32 and
64 bits, for quite for RHDS/port389 and RHCS/Dogtag configurations, some
with several millions ldap entries, for testing and dev, not production,
and performances are good for me, cpu and i/o wise (up to 1,5K entries
imported per sec seen), with usually 512MB or 1GB per guest, sometimes more.
M.
John A. Sullivan III wrote:
Likewise, we are running in VServer (www.linux-vserver.org) with no
problems at all but our environment is currently much smaller - John
On Tue, 2009-07-14 at 12:42 +1000, Luke Bigum wrote:
Hey Nick,
We run Fedora DS inside Virtuozzo VEs (not VMWare) and don't have any capacity concerns, our environment sounds like a good tenth the size of yours though. Each VE (there's 2) has only half a GB of RAM and does about 100 connections a minute, however our LDAP database is very small, so the memory we've allocated is massive overkill. In terms of CPU usage, the VE does practically nothing.
I wouldn't think you'd need much more RAM over the size of your LDAP database files, so unless you've got 8GB of LDAP information, 8GB of RAM sounds a lot to me. Our LDAP database is only about 40MB, which is close to the RAM usage of the VE.
Our stats, might help you decide on what you need. Maybe someone more knowledgeable in the DS internals could explain the large virtual table size.
USER PR NI VIRT RES SHR S %CPU TIME+ %MEM COMMAND
nobody 18 0 601m 39m 18m S 0 16:29.95 7.7 ns-slapd
[root@host:/var/lib/dirsrv/slapd-host]# du -sh .
38M .
Luke Bigum
Systems Administrator
(p) 1300 661 668
(f) 1300 661 540
(e) lbigum@xxxxxxxxxxxx
http://www.iseek.com.au
Level 1, 100 Ipswich Road Woolloongabba QLD 4102
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-----Original Message-----
From: fedora-directory-users-bounces@xxxxxxxxxx [mailto:fedora-directory-users-bounces@xxxxxxxxxx] On Behalf Of Nick Gresham
Sent: Tuesday 14 July 2009 12:18 PM
To: fedora-directory-users@xxxxxxxxxx
Subject: [389-users] Fedora DS with virtual machines
Hi All
Does anyone have any experience running DS in a virtual machine? Our
current LDAP infrastructure is quite busy, 500-1000 connections/
minute, with >6.5 million operations per day. The VMs will have up to
8GB of RAM, though we think we'll only need 6.
We're performing testing with slamd, but it's hard to get truly
representative stress testing using this tool I think.
What has your experience been like? Any snafus to watch out for?
Thanks,
Nick
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