fixing domino server sickness
DESCRIPTION
From Engage 2014 - Breda, NL Updated presentation on working with Domino tools to analyse and fix problemsTRANSCRIPT
![Page 1: Fixing Domino Server Sickness](https://reader036.vdocuments.site/reader036/viewer/2022081720/5403040d8d7f72f24a8b47c6/html5/thumbnails/1.jpg)
#engageug
Fixing Server Sickness
Gabriella Davis Technical Director
The Turtle Partnership
!1
![Page 2: Fixing Domino Server Sickness](https://reader036.vdocuments.site/reader036/viewer/2022081720/5403040d8d7f72f24a8b47c6/html5/thumbnails/2.jpg)
#engageug
Fixing Your Server• What causes server sickness • Tools to spot sickness • Getting Your Server Back to Full Health
!2
![Page 3: Fixing Domino Server Sickness](https://reader036.vdocuments.site/reader036/viewer/2022081720/5403040d8d7f72f24a8b47c6/html5/thumbnails/3.jpg)
#engageug
Server Sickness• The problem with Domino • How does a server get sick?
• Vulnerabilities • Aging Configurations • Bad Habits
!3
![Page 4: Fixing Domino Server Sickness](https://reader036.vdocuments.site/reader036/viewer/2022081720/5403040d8d7f72f24a8b47c6/html5/thumbnails/4.jpg)
#engageug
Server Sickness• The problem with Domino • How does a server get sick?
• Vulnerabilities • Aging Configurations • Bad Habits • Developers Gone Wild
!4
![Page 5: Fixing Domino Server Sickness](https://reader036.vdocuments.site/reader036/viewer/2022081720/5403040d8d7f72f24a8b47c6/html5/thumbnails/5.jpg)
#engageug
The Problem With Domino• “My Server Is Running Fine” • Server Stability
• Often despite our best efforts • Tasks that just run
• even without being properly configured
!5
![Page 6: Fixing Domino Server Sickness](https://reader036.vdocuments.site/reader036/viewer/2022081720/5403040d8d7f72f24a8b47c6/html5/thumbnails/6.jpg)
#engageug
Vulnerabilities• Start with the OS
• patch levels • unnecessary processes with exposed ports • disk and data security
• Then the hardware • It’s all about disk performance • Using a SAN? Is the SAN configured for Domino? • Transaction logs configured?
!6
![Page 7: Fixing Domino Server Sickness](https://reader036.vdocuments.site/reader036/viewer/2022081720/5403040d8d7f72f24a8b47c6/html5/thumbnails/7.jpg)
#engageug
Vulnerabilities• Security
• ACLs • -Default- and Anonymous • LocalDomainServers
• HTTP vs HTTPs • LDAP • DIIOP • Sametime
!7
![Page 8: Fixing Domino Server Sickness](https://reader036.vdocuments.site/reader036/viewer/2022081720/5403040d8d7f72f24a8b47c6/html5/thumbnails/8.jpg)
#engageug
Aging Configurations• What can give you problems over time
• Database sizes • More users • More tasks and features
!8
![Page 9: Fixing Domino Server Sickness](https://reader036.vdocuments.site/reader036/viewer/2022081720/5403040d8d7f72f24a8b47c6/html5/thumbnails/9.jpg)
#engageug
Bad Habits• What are your users doing?
• what features are they using • how are they using them
• are they creating repeating 10yr appointments for instance
• are they copying themselves on emails • Password quality for HTTP passwords
!9
![Page 10: Fixing Domino Server Sickness](https://reader036.vdocuments.site/reader036/viewer/2022081720/5403040d8d7f72f24a8b47c6/html5/thumbnails/10.jpg)
#engageug
Giving Developers Power• Allowing development to dictate replication and agent
scheduling • The curse of not production tested XPages code • Demands for “LDAP” or “DIIOP” for an application to work
!10
![Page 11: Fixing Domino Server Sickness](https://reader036.vdocuments.site/reader036/viewer/2022081720/5403040d8d7f72f24a8b47c6/html5/thumbnails/11.jpg)
#engageug
Tools to Spot Sickness• Understanding Priorities • DDM Probes and Event Analysis
!11
![Page 12: Fixing Domino Server Sickness](https://reader036.vdocuments.site/reader036/viewer/2022081720/5403040d8d7f72f24a8b47c6/html5/thumbnails/12.jpg)
#engageug
Tools to Spot Sickness• Understanding Priorities • DDM Probes and Event Analysis • Statistics • Catalog.nsf • QoS - new with Domino 9 • Enhanced Fault Reporting - new with Domino 9
!12
![Page 13: Fixing Domino Server Sickness](https://reader036.vdocuments.site/reader036/viewer/2022081720/5403040d8d7f72f24a8b47c6/html5/thumbnails/13.jpg)
#engageug
Understanding Priorities• Server role
• What do you want from your server • What are statistics telling you
• Warning Levels • Is it safe to ignore ‘Warning (Low)’ and focus on ‘Fatal’ or
‘Failure’
!13
![Page 14: Fixing Domino Server Sickness](https://reader036.vdocuments.site/reader036/viewer/2022081720/5403040d8d7f72f24a8b47c6/html5/thumbnails/14.jpg)
#engageug
Bringing Problems to You• Event Handlers, Event Generators, Statistics, Fault Reports
and DDM Probes - where to start • Setting Statistic Thresholds • Choosing and configuring probes • Reviewing Faults • Setting up QoS behaviour
!14
![Page 15: Fixing Domino Server Sickness](https://reader036.vdocuments.site/reader036/viewer/2022081720/5403040d8d7f72f24a8b47c6/html5/thumbnails/15.jpg)
#engageug
Bringing Problems To You• Why we set up collection hierarchies for DDM
• and how • Daily and Weekly DDM reviews
• What to look out for
!15
![Page 16: Fixing Domino Server Sickness](https://reader036.vdocuments.site/reader036/viewer/2022081720/5403040d8d7f72f24a8b47c6/html5/thumbnails/16.jpg)
#engageug
Probes for Mail Servers• Security - Weekly • Directory Performance • Critical mail routes • Mail ‘Slack’
!16
![Page 17: Fixing Domino Server Sickness](https://reader036.vdocuments.site/reader036/viewer/2022081720/5403040d8d7f72f24a8b47c6/html5/thumbnails/17.jpg)
#engageug
Probes for Application Servers• Agent run times
• agent cpu usage • Security and Web Configuration
!17
![Page 18: Fixing Domino Server Sickness](https://reader036.vdocuments.site/reader036/viewer/2022081720/5403040d8d7f72f24a8b47c6/html5/thumbnails/18.jpg)
#engageug
Probes for Struggling Servers• OS level
• disk performance (beware of reported SAN problems) • memory • network
!18
![Page 19: Fixing Domino Server Sickness](https://reader036.vdocuments.site/reader036/viewer/2022081720/5403040d8d7f72f24a8b47c6/html5/thumbnails/19.jpg)
#engageug
What to look for• Fatal problems • Persistent Warnings • Peak activity behaviour
• uptick in problems at 9am, 1pm etc • Repetitive low level ‘annoyances’
!19
![Page 20: Fixing Domino Server Sickness](https://reader036.vdocuments.site/reader036/viewer/2022081720/5403040d8d7f72f24a8b47c6/html5/thumbnails/20.jpg)
#engageug
Catalog.nsf• Not every database is immediately visible but they are all
there (just hidden with selection formulae) • It’s a good place to start looking for multiple replica • It’s a good place to find ACL issues • Replicates around your domain and updates overnight
!20
![Page 21: Fixing Domino Server Sickness](https://reader036.vdocuments.site/reader036/viewer/2022081720/5403040d8d7f72f24a8b47c6/html5/thumbnails/21.jpg)
#engageug
QoS - Quality of Service• Monitor server health and performance • Monitors application behavior, stability and hangs • Restarts Domino if it thinks there are memory issues or an
application is hung • Shuts down Domino if a clean shutdown doesn’t happen and
the server hangs • Controlled via notes.ini settings and dcontroller.ini • Requires Domino to be running under the Java Controller
• nserver -jc
!21
![Page 22: Fixing Domino Server Sickness](https://reader036.vdocuments.site/reader036/viewer/2022081720/5403040d8d7f72f24a8b47c6/html5/thumbnails/22.jpg)
#engageug
QoS Configuration• Starting Domino under Java Controller should create a
dcontroller.ini file • QOS_Enable=1 • In Notes.Ini
• QOS_ProbeInterval (defaults to 1 min) • QOS_ProbeTimeout (defaults to 5 mins) • QOS_ShutDown_Timeout • QOS_Apps_Timeout • QOS_Shutdown_Timeout
!22
![Page 23: Fixing Domino Server Sickness](https://reader036.vdocuments.site/reader036/viewer/2022081720/5403040d8d7f72f24a8b47c6/html5/thumbnails/23.jpg)
#engageug
QOS - Potential Problems• QOS doesn’t support passwords on server ids , the restart
will pause at the password entry screen • QOS timeouts being too low • Don’t enable QOS on servers without transaction logging
!23
![Page 24: Fixing Domino Server Sickness](https://reader036.vdocuments.site/reader036/viewer/2022081720/5403040d8d7f72f24a8b47c6/html5/thumbnails/24.jpg)
#engageug
Enhanced Fault Reporting• Fault Reporting Database -lndfr.nsf • Expanded to include a by Disposition view
• all faults when analyzed have a disposition value that categorises as
• Problem • Possible Problem (possibly actionable ) • Possible Problem (likely NOT actionable ) • Informational • Unknown (investigate)
!24
![Page 25: Fixing Domino Server Sickness](https://reader036.vdocuments.site/reader036/viewer/2022081720/5403040d8d7f72f24a8b47c6/html5/thumbnails/25.jpg)
#engageug
Possible Problem - Actionable• Out Of Memory: Represents a crash in which the Java virtual
machine (JVM) ran out of a memory resource such as heap space.
• Launched Notes multiple times: Indicates that the user quickly launched multiple instances of the Notes client
• Possible hang: Indicates that the Notes client was manually terminated while it appeared to be doing useful work.
• User Kill: Indicates that the user manually terminated the client while it appeared to be waiting for input or network timeout
!25
![Page 26: Fixing Domino Server Sickness](https://reader036.vdocuments.site/reader036/viewer/2022081720/5403040d8d7f72f24a8b47c6/html5/thumbnails/26.jpg)
#engageug
Back to Full Health• Getting Control
• Mail , Databases and ECLs • SMTP • Agent Scheduling • Directories • Adminp • LDAP • Tasks and Internet Site Documents
• Domino Configuration Tuner
!26
![Page 27: Fixing Domino Server Sickness](https://reader036.vdocuments.site/reader036/viewer/2022081720/5403040d8d7f72f24a8b47c6/html5/thumbnails/27.jpg)
#engageug
Back to Full Health• Getting Control
• Mail , Databases and ECLs • SMTP • Agent Scheduling • Directories • Adminp • LDAP • Tasks and Internet Site Documents
• Domino Configuration Tuner
!27
![Page 28: Fixing Domino Server Sickness](https://reader036.vdocuments.site/reader036/viewer/2022081720/5403040d8d7f72f24a8b47c6/html5/thumbnails/28.jpg)
#engageug
Getting Control - Mail and Databases• Setting ACLs at directory level (Editor) • Lock down ECLs via Policies • Introducing quotas alongside server based archiving • Consider archiving files to a dedicated server • Upgrade to 8 and enable OOO router instead of agents • Disable forwarding rules set up by users • Use message tracking and mail rules very sparingly • Disable on the fly searching of non indexed databases
!28
![Page 29: Fixing Domino Server Sickness](https://reader036.vdocuments.site/reader036/viewer/2022081720/5403040d8d7f72f24a8b47c6/html5/thumbnails/29.jpg)
#engageug
Database Management Tools• DBMT Server Command
• runs copy-style compact operations • purges deletion stubs • expires soft deleted entries • updates views • reorganizes folders • merges full-text indexes • updates unread lists • ensures that critical views are created for failover
• Replaces Updall • Load updall - nodbmt tells updall to run but not perform the
functions that DMBT already does!29
![Page 30: Fixing Domino Server Sickness](https://reader036.vdocuments.site/reader036/viewer/2022081720/5403040d8d7f72f24a8b47c6/html5/thumbnails/30.jpg)
#engageug
DBMT Parameters• -compactThreads • -updallThreads • -ftiThreads • -timeLimit refers to compact timeout for DBMT • -range starttime stoptime
• compactNdays (run Compact every x days) • ftiNdays (run FT Index every x days) • force d (day Sunday =1) fixup if compact fails for
consecutive day
!30
![Page 31: Fixing Domino Server Sickness](https://reader036.vdocuments.site/reader036/viewer/2022081720/5403040d8d7f72f24a8b47c6/html5/thumbnails/31.jpg)
#engageug
Getting Control - SMTP• Restrict relaying to specific ip addresses not network ranges • Beware of allowing authenticated relaying and opening up to
dictionary attacks • Restrict rights to send to internal groups from internet
addresses • Don’t accept mail for local part matches • Configure your server for HTML mail not plain text
!31
![Page 32: Fixing Domino Server Sickness](https://reader036.vdocuments.site/reader036/viewer/2022081720/5403040d8d7f72f24a8b47c6/html5/thumbnails/32.jpg)
#engageug
Getting Control - SMTP (more)• Don’t allow all connecting hosts to deliver mail inbound, if
you use a service restrict to those hosts • Use services / tools to spot attacks such as
• persistent attempts to mass deliver within a time period • continual failures by a host to deliver to a correct address
• Move responsibility for that first line of defense away from native Domino
!32
![Page 33: Fixing Domino Server Sickness](https://reader036.vdocuments.site/reader036/viewer/2022081720/5403040d8d7f72f24a8b47c6/html5/thumbnails/33.jpg)
#engageug
Getting Control - Agent Scheduling• When are agents set to run
• amgr_newmaileventdelay • amgr_newmailagentmininterval
• If you’re using OOO agents how often are they scheduled • Do users have private agents running
• Sh Agents [DBName] • All shared and private agents in a database
• Who has rights to run agents
!33
![Page 34: Fixing Domino Server Sickness](https://reader036.vdocuments.site/reader036/viewer/2022081720/5403040d8d7f72f24a8b47c6/html5/thumbnails/34.jpg)
#engageug
Getting Control - Directories• Avoid adding additional views to the Domino Directory • The risk of allowing local replicas with Author rights • Directory Assistance
• Sh xdir
!34
![Page 35: Fixing Domino Server Sickness](https://reader036.vdocuments.site/reader036/viewer/2022081720/5403040d8d7f72f24a8b47c6/html5/thumbnails/35.jpg)
#engageug
Getting Control - Adminp• Purge old documents • Requests awaiting approval • Tell adminp process NEW not ALL
!35
![Page 36: Fixing Domino Server Sickness](https://reader036.vdocuments.site/reader036/viewer/2022081720/5403040d8d7f72f24a8b47c6/html5/thumbnails/36.jpg)
#engageug
Getting Control - LDAP• Allowing anonymous access to query LDAP • Authenticating LDAP queries • Extended Directory Catalog used by LDAP • Relying on DNS • Not configuring the LDAP task correctly to allow large
searches with no timeouts • Maintaining schema.nsf
!36
![Page 37: Fixing Domino Server Sickness](https://reader036.vdocuments.site/reader036/viewer/2022081720/5403040d8d7f72f24a8b47c6/html5/thumbnails/37.jpg)
#engageug
Getting Control - Tasks and Program Documents• Disable tasks you don’t need • Schedule overnight tasks so they don’t overlap
• and don’t conflict with backups • Use program documents so you can review and manage
easily • sh config servertasksat*
• Keeping templates on every server • Using compact -B
!37
![Page 38: Fixing Domino Server Sickness](https://reader036.vdocuments.site/reader036/viewer/2022081720/5403040d8d7f72f24a8b47c6/html5/thumbnails/38.jpg)
#engageug
Getting Control - Internet Site Documents• Web Configuration means TCPIP tasks are configured in the
server document and are server wide • often enabled by default
• Internet site documents require you to opt in for TCPIP services
• configured by hostname
!38
![Page 39: Fixing Domino Server Sickness](https://reader036.vdocuments.site/reader036/viewer/2022081720/5403040d8d7f72f24a8b47c6/html5/thumbnails/39.jpg)
#engageug
Domino Configuration Tuner• Domino Configuration Tuner is an analysis tool based on a
set of pre-configured best practice/worst practice rules • The Rules are shipped by IBM with the Lotus installs and are
updated via a public update site • Makes recommendations on configuration changes to
enhance performance and security and reduce TCO
!39
![Page 40: Fixing Domino Server Sickness](https://reader036.vdocuments.site/reader036/viewer/2022081720/5403040d8d7f72f24a8b47c6/html5/thumbnails/40.jpg)
#engageug
How does it work?• Run and installed via the Domino Configuration Tuner
database • Updated by online template updates and rule updates • DCT rules and results are held in a local database and will
require a restart of the client for changes to take effect • Scans
• Server documents • notes.ini settings • advanced database properties
• Intended to scan servers in a single domain!40
![Page 41: Fixing Domino Server Sickness](https://reader036.vdocuments.site/reader036/viewer/2022081720/5403040d8d7f72f24a8b47c6/html5/thumbnails/41.jpg)
#engageug
How does it work?• Creates reports on each scanned server based on the rules
you select • Each report contains
• Issues • recommendations for adjustments • links to supporting documentation
!41
![Page 42: Fixing Domino Server Sickness](https://reader036.vdocuments.site/reader036/viewer/2022081720/5403040d8d7f72f24a8b47c6/html5/thumbnails/42.jpg)
#engageug
Pre-requisites• v8 Notes client (standard or basic) or administrator • dct.nsf database and dct.ntf template • servers 7.x or higher
!42
![Page 43: Fixing Domino Server Sickness](https://reader036.vdocuments.site/reader036/viewer/2022081720/5403040d8d7f72f24a8b47c6/html5/thumbnails/43.jpg)
#engageug
Setup• DCT.NSF • StdDominoConfigTuner Template (dct.ntf) • ID must have reader access to names.nsf • ID must have ‘View Administrator’ rights • Requires no server or domain changes
!43
![Page 44: Fixing Domino Server Sickness](https://reader036.vdocuments.site/reader036/viewer/2022081720/5403040d8d7f72f24a8b47c6/html5/thumbnails/44.jpg)
#engageug
View Administrator Rights• Server Document • Security Tab • View Administrator is a subset
of ‘Administrator’ rights • Think of it as ‘Show’ not ‘Tell’ rights
• Sh users - YES • tell http refresh - NO
!44
![Page 45: Fixing Domino Server Sickness](https://reader036.vdocuments.site/reader036/viewer/2022081720/5403040d8d7f72f24a8b47c6/html5/thumbnails/45.jpg)
#engageug
DCT Preferences• List of all rules • Review rule , description and supporting documentation • All rules are enabled by default for all scans • Enable and Disable rules
!45
![Page 46: Fixing Domino Server Sickness](https://reader036.vdocuments.site/reader036/viewer/2022081720/5403040d8d7f72f24a8b47c6/html5/thumbnails/46.jpg)
#engageug
DCT Updates• Connects to the IBM site to download
• must have outbound connectivity
!46
![Page 47: Fixing Domino Server Sickness](https://reader036.vdocuments.site/reader036/viewer/2022081720/5403040d8d7f72f24a8b47c6/html5/thumbnails/47.jpg)
#engageug
DCT Updates• Click ‘check for updates’ • Connects to an external IBM site to identifies any template or
rule updates
!47
![Page 48: Fixing Domino Server Sickness](https://reader036.vdocuments.site/reader036/viewer/2022081720/5403040d8d7f72f24a8b47c6/html5/thumbnails/48.jpg)
#engageug
DCT Updates• Accept license and updates download • It’s not possible to selectively download
!48
![Page 49: Fixing Domino Server Sickness](https://reader036.vdocuments.site/reader036/viewer/2022081720/5403040d8d7f72f24a8b47c6/html5/thumbnails/49.jpg)
#engageug
DCT Updates - Finished• “Successful” screen will notify you to restart your client • You may need to do 2 client restarts before DCT can be
used
!49
![Page 50: Fixing Domino Server Sickness](https://reader036.vdocuments.site/reader036/viewer/2022081720/5403040d8d7f72f24a8b47c6/html5/thumbnails/50.jpg)
#engageug
• First select the servers in your current domain you want to run against
• The list of servers is retrieved from the domain of the home server identified in your location document
• Change locations to scan a different domain
Running the tuner
!50
![Page 51: Fixing Domino Server Sickness](https://reader036.vdocuments.site/reader036/viewer/2022081720/5403040d8d7f72f24a8b47c6/html5/thumbnails/51.jpg)
#engageug
• You can manually type in the full hierarchical names of any other servers you want to scan as part of this analysis
• Separate multiple server names with commas, semi colons or new lines
• You can only scan servers you can reach so you need a connection document to any you list
• or the server needs to be available via your passthru server in your location
Running the tuner
!51
![Page 52: Fixing Domino Server Sickness](https://reader036.vdocuments.site/reader036/viewer/2022081720/5403040d8d7f72f24a8b47c6/html5/thumbnails/52.jpg)
#engageug
Understanding the Results• Summary results • Issues by criticality
!52
![Page 53: Fixing Domino Server Sickness](https://reader036.vdocuments.site/reader036/viewer/2022081720/5403040d8d7f72f24a8b47c6/html5/thumbnails/53.jpg)
#engageug
Understanding the Results• Summary results • Servers that failed to scan
• reason why scan failed
!53
![Page 54: Fixing Domino Server Sickness](https://reader036.vdocuments.site/reader036/viewer/2022081720/5403040d8d7f72f24a8b47c6/html5/thumbnails/54.jpg)
#engageug
Understanding the Results• Summary results • Detailed list of rules evaluated
!54
![Page 55: Fixing Domino Server Sickness](https://reader036.vdocuments.site/reader036/viewer/2022081720/5403040d8d7f72f24a8b47c6/html5/thumbnails/55.jpg)
#engageug
Understanding the Results• View the current report • Select ‘change’ to view a different report
!55
![Page 56: Fixing Domino Server Sickness](https://reader036.vdocuments.site/reader036/viewer/2022081720/5403040d8d7f72f24a8b47c6/html5/thumbnails/56.jpg)
#engageug
Understanding the Results• Filter results to make analysis easier
• by server • by specific rules • by severity
!56
![Page 57: Fixing Domino Server Sickness](https://reader036.vdocuments.site/reader036/viewer/2022081720/5403040d8d7f72f24a8b47c6/html5/thumbnails/57.jpg)
#engageug
Understanding the results• Categorised results of recommendations • Sorted by criticality and then by server name
!57
![Page 58: Fixing Domino Server Sickness](https://reader036.vdocuments.site/reader036/viewer/2022081720/5403040d8d7f72f24a8b47c6/html5/thumbnails/58.jpg)
#engageug
Understanding the results• Each recommendation comes with an explanation so you
can evaluate on a result by result basis if you want to make the change
!58
![Page 59: Fixing Domino Server Sickness](https://reader036.vdocuments.site/reader036/viewer/2022081720/5403040d8d7f72f24a8b47c6/html5/thumbnails/59.jpg)
#engageug
• Each recommendation is provided with a link to a best / worst practices supporting documentation
Understanding the results
!59
![Page 60: Fixing Domino Server Sickness](https://reader036.vdocuments.site/reader036/viewer/2022081720/5403040d8d7f72f24a8b47c6/html5/thumbnails/60.jpg)
#engageug
Working with Rules• Disabling and enabling rules can be done through the
‘Preferences’
!60
![Page 61: Fixing Domino Server Sickness](https://reader036.vdocuments.site/reader036/viewer/2022081720/5403040d8d7f72f24a8b47c6/html5/thumbnails/61.jpg)
#engageug
Working with Rules• Selecting a rule shows the description and links to the best /
worst practice documentation
!61
![Page 62: Fixing Domino Server Sickness](https://reader036.vdocuments.site/reader036/viewer/2022081720/5403040d8d7f72f24a8b47c6/html5/thumbnails/62.jpg)
#engageug
Making Changes• Advanced Database Properties
• assigned en masse via Domino Admin • notes.ini settings
• assigned via the command set config xxx = x • shown via the command sh config xxx = x
• Many recommendations refer to ‘some databases’ but don’t specify which ones - check which ones will be affected
!62
![Page 63: Fixing Domino Server Sickness](https://reader036.vdocuments.site/reader036/viewer/2022081720/5403040d8d7f72f24a8b47c6/html5/thumbnails/63.jpg)
#engageug
Resources• Domino Configuration Tuner blog
• http://www.bleedyellow.com/blogs/DCT/ • details and explanations of new rules published each
month
!63
![Page 64: Fixing Domino Server Sickness](https://reader036.vdocuments.site/reader036/viewer/2022081720/5403040d8d7f72f24a8b47c6/html5/thumbnails/64.jpg)
#engageug
Summary• No matter how well your servers are configured they will continue to degrade in
performance over time unless you pro-actively monitor and fix • Many of the server performance issues will be seen first by your users before
they filter down to you • Make reviewing your server configuration using DDM probes followed by a DCT
analysis part of every server upgrade • Enable probes that are specific to the server role. Mail and Directory probes on
Mail servers and Agent probes on Application servers • Use Security and Database probes configured in DDM to stay on top of any low
level warnings that could cause larger problems in the future • Don’t over configure your servers to monitor everything or you’ll be looking for
a needle in a haystack. Ask your servers to tell you only what you need to be aware of so immediately
• Use the built in tools, DCT, Statistics, DDM, Catalog, Activity Trends to monitor your servers and gain a good understanding of what is their ‘normal’ behaviour so you can more easily spot when something goes wrong.
!64