Data We Need
A few questions and the list of data that would be most useful for analysis.
Questions for you or your team leader:
HOW DID YOU FIND US? web search, referral by ______________, Facebook, Instagram, can not remember, ________________.
EXISTING KNOWN PROBLEMS (one line, summary, please)
such as
A) Stop/Start services REQUIRED every nn hours to avoid crash/hanging instance
B) Some data entered is missing in the tables the next day (all involved table_names and SHOW CREATE TABLE table_name;).
C) ....
D) ....
or the BEST one is
No KNOWN PROBLEMS
Maximum time allowed for User Inactivity before CONNECTION should be disconnected? Default is frequently 8 hours - 28800 seconds.
nnn SECONDS/MINUTES/HOURS
Does your application have Logout/Signoff available to user?
Yes or No - if No, how are resources released?
Login will likely be required to get back online after disconnection (and resources will again be consumed).
If every CONNECT is closely coupled with CLOSE (after query sequence is completed) you will observe threads_connected remaining a relatively consistent value and not growing every hour. CLOSE will cause Quit to be recorded in your General Log, indicating this thread_id will NOT be sleeping when you look at SHOW FULL PROCESSLIST in 10 seconds.
Is connection pooling in use?
Yes or No will likely influence a few php.ini settings
Rotating HD nnn of Spindles, nnn TB/GB/MB and nnn TB/GB/MB Free Space
SSD nnn TB/GB and nnn TB/GB/MB Free Space of SSD
NVME nnn TB/GB and nnn TB/GB/MB Free Space of NVME
Random Write mfg or tested IOPS? _________ not read seq or RR.
nnn TB/GB/MB row count LIMIT for SQL SELECT, JOIN, SORT, etc. for a single query processing LIMIT
Do you really want to allow one query to JOIN a billions rows of information before concluding this is a MISTAKE? Yes or No, please.
Depending on your application, 1 Million rows LIMIT could be fine.
HOSTED on what system?
___________ pendo.io, AWS, Google, In-house, local area hosting organization.
RAM nnn TB/GB/MB on your Host server, indicate DEDICATED or SHARED w other apps?
Power Plan in use?
High Performance recommended for busy server
rather than Balanced or Power Saver.
For Windows, Run, powercfg.cpl to determine current setting.
Search for Linux Power Plan Settings to find a way to determine your setting.
BIOS settings could still be in your way of achieving high performance.
End of initial questions about your operating environment to be included in your email to mydatalinks@mysqlservertuning.com with your order number as the subject (assigned later), please.
If your only interested in log analysis, please skip to POST DATA DESTINATION
TEXT results of following requests to be "Attached" to email to mydatalinks@mysqlservertuning.com with your Invoice/Order Number leading the Subject line please.
current complete my.cnf or my.ini
current complete php.ini (if used as part of your solution)
TEXT results of: (If you choose to provide xlsx rather than TEXT data, our Suggestions COULD be DELAYED)
A) SHOW GLOBAL STATUS; minimum UPTIME 1 business day, 7 days or more preferred
B) SHOW GLOBAL VARIABLES;
If you are in a crisis, this may be the extent of data you can provide.
We will understand and do the best we can with the data you can provide.
If you are only interested in 4 or 10 Global Variable suggestions you may STOP here, for more detailed analysis, continue please
C) complete current text of first 400 lines AND last 400 lines of error log. Named Beg400error.log and End400error.log, please.
D) SHOW ENGINE INNODB STATUS;
E) SELECT name, count FROM information_schema.innodb_metrics ORDER BY name;
F) SHOW FULL PROCESSLIST; which will include QUERY requests running, sleeping, other APPS in use, utility threads in use, etc.
Optional very helpful information, if available includes -
lscpu for specs, including MHZ, cores + other info
htop, top & mytop for most active apps (page 1 minimum, PNG is OK)
ulimit -a for a linux/unix list of limits
iostat -xm 5 3 for a linux/unix when BUSY for IOPS of hardware extended status
mpstat -P ALL 5 3 for multiprocessor status 5 seconds 3 intervals
df -h for a linux/unix free space list by device
free -h for a linux/unix Total Used Free Mem: and Swap:
cat /proc/meminfo for a Linux/unix report including VMAlloc information
MySQLTuner.pl entire PERL report, please
Why entire report? Because the report includes MySQL V nn, RAM, per Engine analysis of data space/table counts and additional very helpful information.
Text results of
globalstatusage10sec.sql will be done in less than 15 seconds
findfragtables.sql duration depends on number of tables
find-redundant-indexes.sql duration depends on number of tables
from our Utility Scripts+ you may download and use at no charge. This additional data will allow a deeper look into your current instance and table health.
Text results of
SHOW MASTER STATUS;
SHOW SLAVE STATUS;
for current replication information.
ALL suggestions for configuration changes
should be carefully evaluated before taking action.
For text files rather than images, please copy Command Prompt output to clipboard (ctrl+c) and paste into Notepad New File (ctrl+v) for text files works great in Windows.
Linux has similar tools available to save text files.
If you need a delta analysis, please use our SHOP, select LOYALTY Global Status and Global Variable Analysis Delta to order.
For delta analysis of a busy hour, after one hour (or two, or three very busy hours)
repeat gathering the text results of ONLY
A) SHOW GLOBAL STATUS;
B) SHOW GLOBAL VARIABLES;
C) cat /proc/meminfo for a Linux/unix report including VMAlloc information
with accurate filenames including ccyymmddhhmm.
You may wish to have a daily/weekly/monthly/quarterly/semi-annual/annual delta analysis
which we can accommodate if you have your BASELINE start and end delta files available.
POST DATA DESTINATION
After using SHOP to complete your Purchase and you have INVOICE/ORDER # make the Subject of your email INVOICE/ORDER #(assigned at purchase), please so we know which INVOICE/ORDER # your data is to be associated with for analysis, please.
TEXT results to be "Attached" to email to mydatalinks@MySQLServerTuning.com for your OFF CPU analysis processing.
Receipt of these readable attachments STARTS (or RESTARTS) your 4 Business day clock for expected email delivery of our Suggestions.