I know you can look at the size of an uncompressed backup, but that's not practical.
Is there a command to find the size of the database while it is online? (In Linux/Unix/windows)
When connected to a database as db2admin (or with similar permissions), use the following command:
call get_dbsize_info(?,?,?,-1);
The first three parameters are output parameters:
Value of output parameters
--------------------------
Parameter Name : SNAPSHOTTIMESTAMP
Parameter Value : 2014-06-17-13.59.55.049000
Parameter Name : DATABASESIZE
Parameter Value : 334801764352
Parameter Name : DATABASECAPACITY
Parameter Value : 1115940028416
Return Status = 0
The size is given in bytes, so divide by 1024^3 to get Gb.
The final parameter is how often the snapshot is refreshed. -1 is to use default settings.
Further reading...
Note: This command does not take into account logs, etc. - so, it may appear much larger on disk.
Use db2top
l(for session)
p(when press small p it will show the total size of db n used size of db)
For specific schema, in KBytes, use:
SELECT sum(TOTAL_P_SIZE) FROM (
SELECT TABNAME, (DATA_OBJECT_P_SIZE + INDEX_OBJECT_P_SIZE + LONG_OBJECT_P_SIZE +
LOB_OBJECT_P_SIZE + XML_OBJECT_P_SIZE) as TOTAL_P_SIZE
FROM SYSIBMADM.ADMINTABINFO
WHERE TABSCHEMA='PUBLIC'
)
Reference: https://www.ibm.com/support/pages/how-do-i-find-out-disk-space-usage-managing-server-octigate-database-tables
Following command will show you memory used by database online :
db2pd -dbptnmem
You can monitor variety of stuff with db2pd command :
https://www.ibm.com/docs/en/db2/11.1?topic=commands-db2pd-monitor-troubleshoot-db2-engine-activities
Related
I could need some help with a Anylogic Model.
Model (short): Manufacturing scenario with orders move in a individual route. The workplaces (WP) are dynamical created by simulation start. Their names, quantity and other parameters are stored in a database (excel Import). Also the orders are created according to an import. The Agent population "order" has a collection routing which contains the Workplaces it has to stop in the specific order.
Target: I want a moveTo block in main which finds the next destination of the agent order.
Problem and solution paths:
I set the destination Type to agent and in the Agent field I typed a function agent.getDestination(). This function is in order which returns the next entry of the collection WP destinationName = routing.get(i). With this I get a Datatype error (while run not compiling). I quess it's because the database does not save the entrys as WP Type but only String.
Is there a possiblity to create a collection with agents from an Excel?
After this I tried to use the same getDestination as String an so find via findFirst the WP matching the returned name and return it as WP. WP targetWP = findFirst(wps, w->w.name == destinationName);
Of corse wps (the population of Workplaces) couldn't be found.
How can I search the population?
Maybe with an Agentlink?
I think it is not that difficult but can't find an answer or a solution. As you can tell I'm a beginner... Hope the description is good an someone can help me or give me a hint :)
Thanks
Is there a possiblity to create a collection with agents from an Excel?
Not directly using the collection's properties and, as you've seen, you can't have database (DB) column types which are agent types.1
But this is relatively simple to do directly via Java code (and you can use the Insert Database Query wizard to construct the skeleton code for you).
After this I tried to use the same getDestination as String an so find via findFirst the WP matching the returned name and return it as WP
Yes, this is one approach. If your order details are in Excel/the database, they are presumably referring to workplaces via some String ID (which will be a parameter of the workplace agents you've created from a separate Excel worksheet/database table). You need to use the Java equals method to compare strings though, not == (which is for comparing numbers or whether two objects are the same object).
I want a moveTo block in main which finds the next destination of the agent order
So the general overall solution is
Create a population of Workplace agents (let's say called workplaces in Main) from the DB, each with a String parameter id or similar mapped from a DB column.
Create a population of Order agents (let's say called orders in Main) from the DB and then, in their on-startup action, set up their collection of workplace IDs (type ArrayList, element class String; let's say called workplaceIDsList) using data from another DB table.
Order probably also needs a working variable storing the next index in the list that it needs to go to (so let's say an int variable nextWorkplaceIndex which starts at 0).
Write a function in Main called getWorkplaceByID that has a single String argument id and returns a Workplace. This gets the workplace from the population that matches the ID; a one-line way similar to yours is findFirst(workplaces, w -> w.id.equals(id)).
The MoveTo block (which I presume is in Main) needs to move the Order to an agent defined by getWorkplaceByID(agent.workplaceIDsList.get(nextWorkplaceIndex++)). (The ++ bit increments the index after evaluating the expression so it is ready for the next workplace to go to.)
For populating the collection, you'd have two tables, something like the below (assuming using strings as IDs for workplaces and orders):
orders table: columns for parameters of your orders (including some String id column) other than the workplace-list. (Create one Order agent per row.)
order_workplaces table: columns order_id, sequence_num and workplace_id (so with multiple rows specifying the sequence of workplace IDs for an order ID).
In the On startup action of Order, set up the skeleton query code via the Insert Database Query wizard as below (where we want to loop through all rows for this order's ID and do something --- we'll change the skeleton code to add entries to the collection instead of just printing stuff via traceln like the skeleton code does).
Then we edit the skeleton code to look like the below. (Note we add an orderBy clause to the initial query so we ensure we get the rows in ascending sequence number order.)
List<Tuple> rows = selectFrom(order_workplaces)
.where(order_workplaces.order_id.eq(id))
.orderBy(order_workplaces.sequence_num.asc())
.list();
for (Tuple row : rows) {
workplaceIDsList.add(row.get(order_workplaces.workplace_id));
}
1 The AnyLogic database is a normal relational database --- HSQLDB in fact --- and databases only understand their own specific data types like VARCHAR, with AnyLogic and the libraries it uses translating these to Java types like String. In the user interface, AnyLogic makes it look like you set the column types as int, String, etc. but these are really the Java types that the columns' contents will ultimately be translated into.
AnyLogic does support columns which have option list types (and the special Code type column for columns containing executable Java code) but these are special cases using special logic under the covers to translate the column data (which is ultimately still a string of characters) into the appropriate option list instance or (for Code columns) into compiled-on-the-fly-and-then-executed Java).
Welcome to Stack Overflow :) To create a Population via Excel Import you have to create a method and call Code like this. You also need an empty Population.
int n = excelFile.getLastRowNum(YOUR_SHEET_NAME);
for(int i = FIRST_ROW; i <= n; i++){
String name = excelFile.getCellStringValue(YOUR_SHEET_NAME, i, 1);
double SEC_PARAMETER_TO_READ= excelFile.getCellNumericValue(YOUR_SHEET_NAME, i, 2);
WP workplace = add_wps(name, SEC_PARAMETER_TO_READ);
}
Now if you want to get a workplace by name, you have to create a method similar to your try.
Functionbody:
WP workplaceToFind = wps.findFirst(w -> w.name.equals(destinationName));
if(workplaceToFind != null){
//do what ever you want
}
Is there a view to get statistics about the number of writes per day in an Oracle database, and the amount of data associated ?
I had a view over these : V$METRIC_HISTORY, V$METRIC, but I did not find something so relevant about that.
Thanks for your suggestions
I would recommend looking at DBA_HIST_FILESTATXS view :
DBA_HIST_FILESTATXS displays information about file read/write statistics. This view contains snapshots of V$FILESTAT.
Following columns should be of interest for you :
PHYWRTS : Number of times DBWR is required to write
PHYBLKWRT : Number of blocks written to disk, which may be the same as PHYWRTS if all writes are single blocks
Note :
if you want to know the volume written, you need to multiply PHYBLKWRT with BLOCK_SIZE
if you want to filter by dates, you have to JOIN with view dba_hist_snapshot, that stores the snapshot history
I am connecting to a universe database (from rocket software) using their .net driver. I would like to fetch data on demand on user request per page i.e. do pagination. With other databases we could use (offset fetch) but universe db doesn't seem to support it. It does not recognize keyword offset, something like
SELECT NAME, AGE FROM CONTACTS WHERE AGE > 25 offset 5 sample 5 does not work. I does not recognize those keywords and there is no good documentation :-(
Note: Although it is traditionally a multi-value database, the one I am using does not use multi value types but the structure is normalized.
This is certainly one of the shortcomings of this platform. I have worked through this in the past with the something similar to the following subroutine. I had to remove a bunch of stuff for brevity but this compiles so it must work completely bug free, right?
Caveats: You need to have #SELECT DICT item in each file you want to use this with containing all of the columns you want to return.
Multivalues get a little tricky. I had flattened the data I was using this with so I did not run into that problem, but this does not do UNNESTs.
Also you might want to add a value saying how many records there are total and possibly work out some kind of token passing and list saving to cut down on executing the query each time you run it but that gets much, much deeper than the basic question at hand.
SUBROUTINE SQLSelectWithOffset(TableName,UVWithClause,Starting,Offset)
***********************************************************************
* PROGRAM ID: SQLSelectWithOffset
*
* PROGRAM TITLE: SQLSelectWithOffset
*
* DESCRIPTION: Universe doesn't support sql commands using starting and offset
* which makes life hard when you want all of a file
* but you choke on the size. Tokens allow for the selectlist to be saved
* TableName = UV FIle to select on. If this is blank program will return the number of records remaining
* UVWithClause = Your critera, WITH or BY criteria you want in a sort select.
* Starting = Holds you place in line
* Offest = How many records to return
************************************************************************
$INCLUDE UNIVERSE.INCLUDE ODBC.H
RETURN.LIST = ""
IF Starting = "" or Starting < 1 THEN
Starting = 1
END
GOSUB GET.MASTER.LIST
FOR X=Starting TO Offset
ID = EXTRACT(FULL.LIST,X,0,0)
IF ID = "" THEN CONTINUE
RETURN.LIST<-1> = ID
NEXT X
SELECT RETURN.LIST TO 9
SQLSTMT ="SELECT * FROM ":TableName:" SLIST 9"
ST=SQLExecDirect(#HSTMT, SQLSTMT)
RETURN
GET.MASTER.LIST:
STMT = "SSELECT ":TableName
IF UVWithClause NE "" THEN
STMT := " ":UVWithClause
END
EXECUTE "CLEARSELECT"
EXECUTE STMT
READLIST FULL.LIST ELSE FULL.LIST = ""
RETURN
END
Good luck, please only use this information for good!
I'm new at programming, and I've been banging my head trying to figure this out for work.
I am trying to pull roughly 300 mysql tables into Matlab into my workspace.
I have attached the following code, which is designed to pull one table (I plan to loop this code though the 300 mysql tables when it is working).
The code successfully works to import single table into the workspace as a new dataset.
My problem arise when I try to rename this new dataset with the name of the original mysql table.
Please see code below for this part where I screw up (%Assign data to output variable)
I have a list of all the 300 tables names, and I plan to store them in a list called 'name'... Hence, name(1)... is this the right approach?
For example, the original mysql table was called 'options_20020208'.
After I run the script, I need the new dataset that Matlab imports to be called 'options_20020208' as well.
Any ideas here?
%Define Query
name = 'options_20020208'
%Set preferences with setdbprefs.
setdbprefs('DataReturnFormat', 'dataset');
setdbprefs('NullNumberRead', 'NaN');
setdbprefs('NullStringRead', 'null');
%Make connection to database.
conn = database('', 'root', 'password', 'Vendor', 'MYSQL', 'Server', 'localhost', 'PortNumber', 3306);
%Read data from database.
curs = exec(conn, [['SELECT ',name,'.UnderlyingSymbol , ']...
, [name,'.UnderlyingPrice , ']...
, [name,'.Expiration , ']...
, ['FROM ','PriceMatrix.',name,' ']...
]);
curs = fetch(curs);
close(curs);
%Assign data to output variable
name(1) = curs.Data;
%Close database connection.
close(conn);
%Clear variables
clear curs conn
If you have defined a variable name, name(1) means "the first element of variable name" (in this case just "o"). Regardless of the dimensions of the variable it returns a single value (i.e. even if X is some 5-D monstrosity, X(50) returns only the value of the 50th element). name(1) = data means "set the first element of variable name to be equal to data" and will cause an error if data is not of the right size, and either an error or unexpected behaviour if it's not the right type.
For example, try this at the command line:
name = 'options_20020208';
name(1) = 1
Now, technically what you want can be done, although I don't recommend it. If you have all the names in some sort of 300 x (length) variable then over a loop of n = 1:300 it would be something like this (where name is your list of variable names):
eval([name(n,:) ' = curs.Data;'])
This will return 300 variables named 'options_20020208' or similar each containing one set of curs.Data. However, there are better ways of storing data in your workspace that will make further operations on your data easier, for example you could use structures:
myStruct(n).name = name(n,:);
myStruct(n).Data = curs.Data;
If you wanted to do some analysis and then save out all this data in some format, for example, it's going to be much easier to loop over the structure, and set the filename to [myStruct(n).name,'.csv'] and the file contents to mystruct(n).AdjustedData, etc., then to deal with 300 named variables.
I am trying to retrieve data about groups on LDAP. As I need to paginate results, I need to run range queries. My setup uses JNDI to connect to LDAP. I am trying to run this query
(&(objectclass=group)(range=1-500))
What am I doing wrong? I know there are range based queries for LDAP,how do I modify this query for get the same?
Well paging is one thing and range is another. You page the results that you get back from the LDAP server when there are more than 1000 entries (at least that's the default in Active Directory).
MSDN has an article on how to do paged searches in .NET; hopefully you can translate that to your environment.
Range is something different. You use range when you have a multi-value-attribute (commonly the member-attribute for a group) that has a large number of values. So you can't have range in the query. You need to specify the range when you access the multi-value-attribute (then instead of just specifying member in the code accessing the property value you specify member;range=1-500 to get the first 500 values from that multivalue attribute).
Instead of Simple Paging control you may consider using Virtual List View control if your AD is version 2003 or above. Virtual List View provided advanced result sorting options and gives you more power in controlling the subset of the search result set.
This is how you need to query to get results
int start = 0;
int step = 1500;
int finish = 1499;
boolean finished = false;
String range;
String returnedAtts[] = {"member;Range=" + range};
searchCtls.setReturningAttributes(returnedAtts);
NamingEnumeration answer = readableDirContext.search(searchDN, searchFilter, searchCtls);