Linux – Profiling System Resource Utilization – Day 1

August 14, 2018August 15, 2018 Daniel Adeniji free ( Linux - Command ), iostat ( Linux - Command ), Linux, sar ( Linux Command ), Technical, top ( Linux Command )

Background

Since we are already talking about profiling Applications, let us quickly highlight some of the available tools for measuring Application Resource Utilization on a Linux box.

Terminology

Memory
- buffer
  - Amount of memory that is buffered. In simple words, buffers are used for caching of filesystem metadata (permissions, location, etc.) and tracking in-flight pages. ( Link )
- cache
  - Amount of memory that is cached. Cache contains data that has already been read from the disk and is kept in memory for possible future use, f.e a pdf file or web browser pages. ( Link )

Outline

top ( Link )
sar ( Link )
free ( Link )
iostat ( Link )

top

The “top” command lists the processes running on a Linux box.

top stands for “Table of Processes“.

Sample Reading

MySQL

Here are sample outputs from a MySQL Box.

Sample #1

Image

Output

Our box has been up for 14 days
CPU
- User :- 0.2%
- System :- 0.5%
- Nice :- 0%
- Idle :- 99.2%
Memory
- Mem: 1872716k total, 1598392k used, 274324k free, 204700k buffers
  - Total :- 1872716k ( 1872 MB / 1.82 GB )
  - Used :- 1598392k ( 1598 MB / 1.60 GB )
  - Free :- 274324k ( 274 MB )
Swap
- Swap: 1048572k total, 87176k used, 961396k free, 578420k cached
  - Total :-1048572K ( 1048.572 MB / 1.05 GB )
  - Used :- 87176k ( 87 MB )
  - Free :- 961396k ( 961 MB )
Processes
- Process /MySQL
  - PID ( Process ID )
  - USER
    - MySQL
  - PR ( User Priority )
    - 20
  - NI ( Nice )
    - 0
  - VIRT ( Virtual Memory )
    - 1789 MB
      - Our database server, MYSQL, requested 1800 MB
  - RES ( Resident Memory )
    - 568 MB
      - Our database server, MYSQL, is using actual memory of 568 MB
  - SHR ( How much of Total Virtual Memory this process is sharing with others)
    - 6048
    - What is the measurement?
  - S ( Process State )
  - %CPU
  - %MEM
  - TIME+
  - COMMAND

Functionalities

Outline

Order By

Order By

To review or change the ordering please press the Shift-O button.

The “Current Sort Field” window appears.

Image

top_sort_20180813_0316AM

Please review the available sort fields and press the corresponding character.

sar

Definition

The sar common stands for “System Activity Report“.

Options

Memory-rMemory free, usedsar -r

Objective	Option	Description	Sample
Processor Cumulative	-p	Processor Cumulative	sar -P ALL
Processor Detail	-P	Process All or Specific	sar -P ALL
Processor Run Queue and Load Average	-q	Reports run queue and load average	sar -q
Swap Space Utilization	-S	Swap space utilization	sar -S
Storage I/O	-b	Storage IO Transactions ( Count & Bytes)	sar -b
Storage I/O @ Block Device Level	-d	IO Transactions ( Count & Bytes)	sar -d
Network	-n	Network	sar -n DEV

Scenarios

Review current Days report.

Outline

Get Stats for current day.

Code

sar

Output

Explanation

CPU
- All available CPU
%user
- User applications CPU Percentile usage
%nice
- CPU Percentile usage attributed to applications running under “nice” mode
%System
- % CPU by system applications ( Kernel, device drivers )
%iowait
- % CPU Idle waiting for I/O completion
- References
  - Red Hat Enterprise Linux – What Is the Meaning of %iowait as Reported by Utilities Such as sar or top?
    Link

Review past reports

Outline

Get Stats for the 7th day of the current Month

Code


sar -p -f /var/log/sa/sa07

Output

linux_db2_20180812_0957PM

Review CPU Utilization full and individualized

Outline

Get Stats for current day.

Code


sar -P ALL

Output

linux_db2_20180814_0341AM

Explanation

CPU
- All available CPU
%user
- User applications CPU Percentile usage
%nice
- CPU Percentile usage attributed to applications running under “nice” mode
%System
- % CPU by system applications ( Kernel, device drivers )
%iowait
- % CPU Idle waiting for I/O completion
- References
  - Red Hat Enterprise Linux – What Is the Meaning of %iowait as Reported by Utilities Such as sar or top?
    Link

Review Memory Utilization

Outline

Get Stats for current day.

Code


sar -r

Output

Explanation

kbmemfree
- Free Memory in KB
kbmemused
- Used Memory in KB
%memused
- Percentile ( %) of Memory Used
kbbuffers
- Buffers for disk writes
kbcached
- Used as cached for disk reads
kbcommit
- Amount of Memory needed for current workload. Total Memory needed to ensure that we do not run out of Memory.
%commit
- % Total Memory that is actually in use per current workload

Review Swap Space Utilization

Outline

Get Swap Space for current day.

Code


sar -S

Output

Explanation

kbswpfree
- Free Swap Space in KB
kbswpused
- Used Swap Space in KB
%swpused
- Percentile ( %) of Swap Space Used
kbswpcad
- Amount of cached swap memory in kilobytes. This is memory that once was swapped out, is swapped back in but still also is in the swap area (if memory is needed it doesn’t need to be swapped out again because it is already in the swap area. This saves I/O). ( Link )
%swpcad
- Percentage of cached swap memory in relation to the amount of used swap space. ( Link )

Review I/O Transfer Rates

Outline

Get I/O Transfer rates and read and writes blocks.

Code


sar -d -f /var/log/sa/sa07

Output

Explanation

DEV
tps
- Total number of transfers per second that were issued to physical devices. A transfer is an I/O request to a physical device. Multiple logical requests can be combined into a single I/O request to the device. A transfer is of indeterminate size. ( Link )
rd_sec/s
- Number of read requests per second
wr_sec/s
- Number of writes per second
avgrq-sz
- The average size (in sectors) of the requests that were issued to the device. ( Link )
avgqu-sz
- Average Queue Size
- The average queue length of the requests that were issued to the device. ( Link )
await
- The average time (in milliseconds) for I/O requests issued to the device to be served. This includes the time spent by the requests in queue and the time spent servicing them. ( Link )
svctm
- The average service time (in milliseconds) for I/O requests that were issued to the device. Warning! Do not trust this field any more. This field will be removed in a future sysstat version. Percentage of CPU time during which I/O requests were issued to the device (bandwidth utilization for the device). Device saturation occurs when this value is close to 100%. ( Link )
%util
- Percentage of CPU time during which I/O requests were issued to the device (bandwidth utilization for the device). Device saturation occurs when this value is close to 100%. ( Link )

Outline

Get I/O Transfer rates and read and writes blocks and in print friendly mode.

sar -dp
- Option
  - d is disk
  - p is print friendly
- Crediting
  - Community Home Servers and Operating Systems Operating System – Linux System Administration “sar -d” devices – how to map to /dev/sdNNN device…
    Link

Code


sar -dp -f /var/log/sa/sa07

Output

Review I/O Transfer Rates

Outline

Get I/O Transfer rates and read and writes blocks.

Code


sar -b

Output

Explanation

tps
- Total number of transfers per second that were issued to physical devices. A transfer is an I/O request to a physical device. Multiple logical requests can be combined into a single I/O request to the device. A transfer is of indeterminate size. ( Link )
rtps
- Number of read requests per second
wtps
- Number of writes per second
bread/s
- Number of sectors read per second. A sector is 512 bytes ( Link )
bwrtn/s
- Number of sectors written per second. A sector is 512 bytes ( Link )

Reports run queue and load average (sar -q)

Outline

This reports the run queue size and load average of last 1 minute, 5 minutes, and 15 minutes.

Code


sar -q

Output

Explanation

runq-sz :- Run Queue Size
plist-sz :- Process List
ldavg-1 :- Load Average Size taken 1 minute ago
ldavg-5 :- Load Average Size taken 5 minutes ago
ldavg-15 :- Load Average Size taken 15 minutes ago
blocked :- Number of blocked tasks

Reports run queue and load average (sar -n)

Outline

This reports the run queue size and load average of last 1 minute, 5 minutes, and 15 minutes.

Code


sar -n DEV -f /var/log/sa/sa07 -s 18:00:00 -e 23:59:00 | grep 'IFACE\|eth0'

Output

sar-n-DEV-linux_db2_20180814_1250PM

Explanation

IFACE
- Interface
rxpck/s
- Receive packets
txpck/s
- Transmit packets
rxkB/s
- Receive Kb/s
txkB/s
- Transmit Kb/s
rxcmp/s
txcmp/s
rxmcst/s

Free

Definition

Display amount of free and used memory in the system.

Outline

Review Memory usage.

Usage

Usage – Raw Data

Code


free

Output

Explanation

total
- Total Memory
used
- Used Memory
free
- Free Memory
shared
- Shared Memory
buffers
- Memory allotted for writing
cached
- Memory allotted for reading

Usage – Human Readable

Code


free -h

Output

iostat

Definition

Reports IO Statistics.

Outline

Review IO Statistics on each device.

Usage

Usage – Raw Data

Code


iostat -N

Output

Explanation

Summary
- Average CPU
  - User
    - 7.4%
  - System
    - 2.51%
Detail
- Device
  - data1-db2data–11
    - tps :- 226.42
    - Blk_read/s :- 23254.73
    - Blk_wrtn/s :- 347.39
    - Blk_read :- 35060914332
    - Blk_wrtn :- 523763058
  - data1-dbbackup–11
    - tps :- 796.31
    - Blk_read/s :- 5785.45
    - Blk_wrtn/s :- 6187.70
    - Blk_read :- 8722664698
    - Blk_wrtn :- 9329126392

References

BooleanWorld
- Top Command
  - A Guide to the Linux Top Command
    Link
Lily Feng
- Top Command
  - The difference among VIRT, RES, and SHR in top output
    Link
nixCraft
- How do I Find Out Linux CPU Utilization?
  Link
Ramesh Natarajan
- The Geek Stuff
  - 10 Useful Sar (Sysstat) Examples for UNIX / Linux Performance Monitoring
    Link
Neeraj Bhatia
- Linux Memory Utilization
  Link
Lisenet
- Tomas
  - Measure and Troubleshoot Linux Memory Resource Usage
    Link
HowtoForge
- Linux Free Command Explained for Beginners (6 Examples)
  Link
stackExchange
- top
  - Top – what does Virtual memory size mean? …linux/ubuntu
    Link
  - Process ‘niceness’ vs. ‘priority’
    Link
serverfault
- top
  - Memory Usage Numbers In top/htop
    Link
Quora
- top
  - What is the difference between the NI and PR values in the top(1) command’s output? I know NI is the nice value, which ranges from -19 to 20, but what is the significance of PR value?
    Link

Windows 10 – Installing Linux SubSystem

June 10, 2018June 14, 2018 Daniel Adeniji Linux, Microsoft, MS Windows, PowerShell, Rich Turner, Technical, Windows 10, Windows Subsystem for Linux ( WSL ) Linux

Background

Availing Linux on MS Windows 10.

Here is the guide that we will be using:

Windows 10 Installation Guide
Install the Windows Subsystem for Linux
Link

Outline

Enable Windows Feature
- Microsoft Windows Subsystem Linux
Review OS Version
- Issue SystemInfo and get OS Version and Build Number
Choose Install Location, based on Build Number
- If Build Number > 16215
  - We can install from Windows Store
- Else
  - Enable Windows Developer Mode
  - Start Bash or use “lxrun /install“
Register Product
Create Linux User
Set root user’s password

Install Steps

Enable Windows Optional Features

Microsoft-Windows-Subsystem-Linux

Code


powershell -C "Enable-WindowsOptionalFeature -Online -FeatureName Microsoft-Windows-Subsystem-Linux"

System Info

Code


powershell -C "systeminfo | Select-String 'OS' "

Output

version_20180610_0902PM

Explanation

As our Build Number ( 17134 ) is greater than 16215, we can install via “Microsoft Store“.

Microsoft Store

Visit Microsoft Store and search for Linux.

https://www.microsoft.com/en-us/search/result.aspx?q=linux

Here is the result of that search:

SUSE Linux Enterprise Server 12

We chose to go with SE Linux.

SUSE Linux Enterprise Server 12 – Get

Use across your devices

Add your Microsoft account to Microsoft Store

AddYourMicrosoftAccountToMicrosoftStore_20180610_0921PM [brushedup].PNG

Enter Password

AddYourMicrosoftAccountToMicrosoftStore_EnterPassword_20180610_0923PM.PNG

Installing

Installing_20180610_0911PM

SUSE Linux Enterprise Server 12 – Registration +User

SUSE Linux Enterprise Server 12 – Registration +User +Password

Validation

Bash

uname

Get Linux Version

Code


uname -r

Output

bash_uname_20180610_0938PM

List Users

Code


cat /etc/passwd

Output

References

Microsoft
- Install the Windows Subsystem for Linux
  - Install the Windows Subsystem for Linux
    Link
- Rich Turner
  - Bash on Ubuntu on Windows – Download Now!
    Link

Linux – Disk Utilization using du

February 6, 2018February 6, 2018 Daniel Adeniji du, Linux, Linux Commands, sort, Technical

Background

End of Year, Beginning of a new year, and end of Month are often good times to stress a computer system.

We have had our systems stressed these last couple of months.

Often it is running low on disk space, a lot of higher than normal database backup and log backups.

MS Windows

Microsoft Tools

On Windows I will often use Microsoft’s own Computer Management to review disks logical size and utilization.

Or File Explorer and filter by size looking for huge ones.

Space Sniffer

Or better still SpaceSniffer.

I spoke about SpaceSniffer here.

Linux

I know I am avoiding talking about Linux.

And, so let us talk about Linux a bit.

du command

Introduction

I suppose du means disk utilization.

Help

First let us get a quick overview of what du does and the options it offers.

Syntax


du --help

Output

Explanation

What does it do?

Summarize disk usage of each FILE, recursively for directories.

Options Tabulated

Option	Meaning	Usage
-a	List files as well, not just directories	Usage is du -a
-B	Block Size	-b 1 is default -b 1024 means to divide the actual size by 1 K
-h	Human readable	usage is du -h
–exclude=PATTERN	Exclude files based on certain filename or extension	du -a -B 1 -h –exclude=*.gz /dbbackup
–max-depth	Our many folders down to go	du –max-depth=4 /dbbackup

Sample

Block Size ( -B)

Sample ( Block Size at 1 )


du -a -B 1 /dbbackup | grep "sql"

Output

Explanation

/dbbackup/gregory/export.sql is 4096

Sample ( Block Size at 1024 )


du -a -B 1024 /dbbackup | grep "sql"

Output

Explanation

/dbbackup/gregory/export.sql
- was at 4096
- But, now is 4
  - 4096/1024 => 4

Human Readable ( -h)

Sample ( Block Size at 1024 )


du -a -h *.sql

Output

Explanation

/dbbackup/gregory/export.sql
- was at 4096
- But, now a more readable 4.0 K

exclude ( -exclude=filter)

Sample ( Exclude files already compressed via gzip )


du -a --exclude=*.gz

max-depth=N

Depth to show = 1


du --max-depth=1 -h /dbbackup

Output

Depth to show = 4


du --max-depth=4 -h /dbbackup

Output

Explanation

In our first sample:
- We progressed down only one folder tree from our asking node ( /dbbackup )
In our second example:
- We went down 4 levels from our root from /dbbackup

Use case scenario

Use case #1

Get Folder Size for our backup folder ( /dbbackup)

Baseline

Sample


du --max-depth=4 /dbbackup

Output

Silence Errors

There is an error for “permission denied“.

Let us silence it for now.

Sample


du --max-depth=4 /dbbackup 2>1 | grep -v 'permission denied'

Output

Explanation

Using 2>1
- We redirect errors such as permission denied to standard output
Using grep -v
- We filter out ‘permission denied’

Ordered Results

Let us order by size.

Sample


du --max-depth=4 /dbbackup 2>1 | grep -v 'permission denied' | sort -nr

Output

References

StackOverflow
- Exclude all permission denied messages from “du”
  Link

Linux – Disk Utilization [ du ]

October 17, 2017October 17, 2017 Daniel Adeniji du, Linux, Linux Commands, Technical

Background

Let us quickly discuss using “Disk Utilization“, du, to list disk utilization on a Linux System.

BTW, we will be targeting folder level information.

Options

Tabulated

Option	Option Short Form	Option Long Form	Sample
Human Readable	-h	–human-readable	K – Kilobytes M – Megabytes G – Gigabytes T – Terabytes
Total	-c	–total	du –total
Summarize	-s	–summarize	du -s du –summarize

Sample

Human Readable

Command


du -h *  2>/dev/null

Output

Total

Objective

List sizes for the following folders and at the tail end list aggregated size, as well
- db2inst1/sqllib/acs
- db2inst1/sqllib/db2tss

Command


du -c db2inst1/sqllib/acs db2inst1/sqllib/db2tss 2>/dev/null | more

Output

Summarize

Summarize for specific folders

Objective

Summarize sized for the following folders
- db2inst1/sqllib/acs
- db2inst1/sqllib/db2tss

Command


du -s db2inst1/sqllib/acs db2inst1/sqllib/db2tss 2>/dev/null | more

Output

Summarize for all folders

Objective

Summarize all sub-folders

Command


du -s * 2>/dev/null | more

Output

Summarize for all folders and Ordered

Objective

Summarize all sub-folders
And, order the results

Command


du -s * 2>/dev/null | sort -nr

Output

References

Lifewire
- How To Find How Much Disk Space A File Or Folder Uses In Linux
  Link
Stack Exchange
- Listing directories based on size from largest to smallest on single line
  Link

MySQL on Linux – Checking Log files

July 29, 2017August 9, 2017 Daniel Adeniji Configuration ( MySQL), Linux, Log files ( MySQL), MySQL, Putty, Technical

Background

I am am On-Call this week.

As we have a System Reconfiguration slated for late hours when changes that includes system downtime are often scheduled to occur, my manager checked-in with me to see whether I was OK being assigned the Task.

I said Yes, and so here I find myself gauging my actual readiness.

On-Call Check Preparedness

Our team lead has written a very nice detailed document that covers each database platform( DB/2, Oracle, MySQL on Linux and SQL Server on Windows).

Outline

As all Databases that run on Linux have pretty much the system administrative steps, here is a condense straightforward list:

Initiate SSH to Linux Host
Authenticate
sudo to DB Engine User
Connect to DB Instance
Change context to problematic database
Review Error Logs
Review System Metrics ( Disk / Memory / and CPU )

MySQL on Linux

SSH to Linux

Putty

Hostname = Hostname
Port = 22
Connection Type :- SSH

Image

Authenticate

Steps

Login as :- <username>
Password :- <password>

Image

Authenticated

Image

Confirm user running mysql

Code


ps aux | grep 'sql' | grep -v 'grep'

Output

Explanation

There are two mysql processes
- /usr/bin/mysql_safe
  - user :- root
- /usr/sbin/mysqld
  - user :- mysql
  - daemon process :- mysqld
  - basedir :- /usr
  - datadir :- /data/mysql
  - user :- myssql/err_log/mysql-err.log
  - port :- 3306
What is the difference between the two processes
- /usr/bin/mysql_safe
  - It is the bootstrap process
  - It ensures that mysqld is running and restarted if knocked down
- /usr/sbin/mysqld
  - Actual mysql daemon process

sudo to DB Engine User

We are interested in the actual daemon and so we will target mysql.

sudo command

Syntax


sudo su - [account]

Code


sudo su - mysql

Output

Entered password

validate sudo user

Syntax


env | grep "USER"

Output

Connect to mysql

Code


mysql -h localhost

Output

Get Configuration Information – log file

Code


show global variables like '%log%'

Output

Explanation

variable_name	value	meaning
general_log	OFF	Debug Mode. Should only be used during brief troubleshooting sessions. Logs all connections and query submissions.
general_log_file	/logs/mysql/mysqld.log	Log file
log	OFF	In MySQL v5.1.29, *deprecated* in favor of general-log
log_error	/logs/mysql/err_log/mysql-err.log	Errors and Startup messages
log_output	FILE	This option determines the destination for general query log and slow query log output. The option value can be given as one or more of the words TABLE, FILE, or NONE. TABLE select logging to the general_log and slow_log tables in the mysql database as a destination. FILE selects logging to log files as a destination. NONE disables logging. ( Link )
log_queries_not_using_indexes	OFF	To include queries that do not use indexes for row lookups in the statements written to the slow query log
log_throttle_queries_not_using_indexes	OFF	To include queries that do not use indexes for row lookups in the statements written to the slow query log, enable the `log_queries_not_using_indexes`system variable. When such queries are logged, the slow query log may grow quickly. It is possible to put a rate limit on these queries by setting the log_throttle_queries_not_using_indexes system variable. By default, this variable is 0, which means there is no limit. Positive values impose a per-minute limit on logging of queries that do not use indexes. The first such query opens a 60-second window within which the server logs queries up to the given limit, then suppresses additional queries. If there are suppressed queries when the window ends, the server logs a summary that indicates how many there were and the aggregate time spent in them. The next 60-second window begins when the server logs the next query that does not use indexes. ( Link )
log_slow_queries	OFF	Slow query log. Deprecated in favor of slow_query_log ( 5.1.29 ). Please see here and here.
log_warnings	2	Print out warnings such as Aborted connection… to the error log. This option is enabled (1) by default. To disable it, use –log-warnings=0. Specifying the option without a level value increments the current value by 1. Enabling this option by setting it greater than 0 is recommended, for example, if you use replication (you get more information about what is happening, such as messages about network failures and reconnections). If the value is greater than 1, aborted connections are written to the error log, and access-denied errors for new connection attempts are written. ( Link )
long_query_time	2	If a query takes longer than this many seconds, the server increments the Slow_queries status variable. If the slow query log is enabled, the query is logged to the slow query log file. This value is measured in real time, not CPU time, so a query that is under the threshold on a lightly loaded system might be above the threshold on a heavily loaded one. The minimum and default values of long_query_time are 0 and 10, respectively.
slow_query_log	OFF	Whether the slow query log is enabled. The value can be 0 (or OFF) to disable the log or 1 (or ON) to enable the log. The destination for log output is controlled by the log_output system variable; if that value is NONE, no log entries are written even if the log is enabled.
slow_query_log_file	/logs/mysql/slow-queries.log	File name to log Slow query

More Concise Queries

Query -01


show global variables where variable_name in 
( 
      'general_log'
    , 'general_log_file'
    , 'log_error'
    , 'log_warnings'
    , 'long_query_time'
    , 'slow_query_log'
    , 'slow_query_log_file'
);

Output -01

View Log files

mysql_err.log

tail


tail /logs/mysql/err_log/mysql-err.log

output

Explanation

Not much bad going on

References

mysql
- Show Variables
  - Log Destinations
    Link
  - Show Variables
    Link
- Server System Variables
  - System Server Variables
    Link
- log Warnings
  - MySQL 5.7 Reference Manual / .. / Communication Errors and Aborted Connections // B.5.2.11 Communication Errors and Aborted Connections
    Link
- General Query & Slow Query Log Output
  - 5.4.1 Selecting General Query and Slow Query Log Output Destinations
    Link
- log_slow_queries
  - server-options.html#option_mysqld_log-slow-queries
    Link
- Slow Query Log
  - MySQL 5.7 Reference Manual /Slow Query Log
    Link
mySQL VS mysqld
- How to start mysqld through mysqld_safe
  Link
pontikis.net
- How and When To Enable MySQL Logs
  Link
Unix Commands
- ps
  - nixcraft
    - Warning: bad syntax, perhaps a bogus ‘-‘? See /usr/share/doc/procps-3.2.7/FAQ
      Link
    - Quick Shell Tip: Remove grep command while grepping something using ps command
      Link
- sudo
  - StackExchange
    - Where does sudo get the currently logged in username from?
      Link

SQL Server – Analysis Services – Cannot Connect ( Microsoft.AnalysisServices.AdomdClient )

May 19, 2017May 20, 2017 Daniel Adeniji Connectivity ( Analysis Services ), Microsoft, Network Tracing, Networking, SQL Server, SQL Server Analysis Services (SSAS), Technical 2383, A connection cannot be made, Ensure that the server is running, firewall, Microsoft.AnalysisServices.AdomdClient

Background

Users are having problems connecting to the Analysis Services Server.

Error Message

Image

Text


TITLE: Connect to Server
------------------------------

Cannot connect to ....sql01.

------------------------------
ADDITIONAL INFORMATION:

A connection cannot be made. Ensure that the server is running. (Microsoft.AnalysisServices.AdomdClient)

------------------------------

A connection attempt failed because the connected party did not properly respond after a period of time, 
or established connection failed because connected host has failed to respond z.y.76.188:2383 (System)

Text


===================================

Cannot connect to d-isql01.

===================================

A connection cannot be made. Ensure that the server is running. (Microsoft.AnalysisServices.AdomdClient)

------------------------------
Program Location:

at Microsoft.AnalysisServices.AdomdClient.XmlaClient.GetTcpClient(ConnectionInfo connectionInfo)
at Microsoft.AnalysisServices.AdomdClient.XmlaClient.OpenTcpConnection(ConnectionInfo connectionInfo)
at Microsoft.AnalysisServices.AdomdClient.XmlaClient.OpenConnection(ConnectionInfo connectionInfo, Boolean& isSessionTokenNeeded)
at Microsoft.AnalysisServices.AdomdClient.XmlaClient.Connect(ConnectionInfo connectionInfo, Boolean beginSession)
at Microsoft.AnalysisServices.AdomdClient.AdomdConnection.XmlaClientProvider.Connect(Boolean toIXMLA)
at Microsoft.AnalysisServices.AdomdClient.AdomdConnection.XmlaClientProvider.Microsoft.AnalysisServices.AdomdClient.AdomdConnection.IXmlaClientProviderEx.ConnectXmla()
at Microsoft.AnalysisServices.AdomdClient.AdomdConnection.ConnectToXMLA(Boolean createSession, Boolean isHTTP)
at Microsoft.AnalysisServices.AdomdClient.AdomdConnection.Open()
at Microsoft.SqlServer.Management.SqlStudio.Explorer.ObjectExplorerService.ValidateConnection(UIConnectionInfo ci, IServerType server)
at Microsoft.SqlServer.Management.UI.ConnectionDlg.Connector.ConnectionThreadUser()

===================================

A connection attempt failed because the connected party did not properly respond after a period of time, or established connection failed because connected host has failed to respond xx.xx.xx.xx:2383 (System)

------------------------------
Program Location:

at System.Net.Sockets.TcpClient..ctor(String hostname, Int32 port)
at Microsoft.AnalysisServices.AdomdClient.XmlaClient.GetTcpClient(ConnectionInfo connectionInfo)

TroubleShooting

Server

Resource Monitor

If the server has Microsoft’s Resource Monitor built-in let us use to it to review Network Ports.

Image

Explanation

Listening Ports
- Image :-
  - msmdsrv.exe
- Address :-
  - IPV4 unspecified
  - IPV6 unspecified
- Port :-
  - 2383
- Protocol
  - TCP
- Firewall Status
  - Allowed, not restricted

Client

netstat

Script


netstat -an | find "SYN_SENT"

Sample Output

Explanation

Request was sent to port 2383
Status is SYN_SENT
- SYN_SENT means waiting on a reply

Remediation

Open up TCP Port 2383.

Review

Once the Network Port, 2383, is opened up retry access with SSMS.

Network Flow

Also, it makes sense to review the Network Traffic to get a full list of ports to be opened.

WireShark

Output

Explanation

Seems Analysis Services exclusively relies on port 2383.

Linux – Finding Text in Log Files – Day 1

April 13, 2017April 14, 2017 Daniel Adeniji grep, Linux, Linux Commands, Microsoft, Technical

Background

Don’t really spend much time in the Linux World.

But, there are many Application Servers that sit on Linux Servers and rely on SQL Server on Windows.

Log Files

When error occurs a good Application Server write these errors in Log Files.

After a while needs develop to trend the type of DB Connectivity and more serious hard errors.

Sample Log Files

As we discussed in a recent post, we copied over SQL Server Error Log files over to Linux.

Text Search

grep

Let us use grep to perform simple Text Searches.

Scenario

Look for Text Matching Manufacturer

Script


grep -w -i -l -n  "Manufacturer" ERRORLOG

Output

Explanation

No matches

Remediation

Attempted Workarounds

We tried the following workarounds

Worked
- Created a much simple text file and was able to grep against it
Did Not Help
- Modified copy over mode to binary and back to text
- Command Issued
  - cat ERRORLOG | grep -i “manufacturer”

Worked

Code


cat ERRORLOG | tr -d '\000' | grep -i "manufacturer"

Output

Why does it work

Cat
- Outputs a file’s content
tr – stands for translate
- tr -d ‘\000’
  - -d means delete
  - \000 means null character

Crediting

What makes grep consider a file to be binary?
Link

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