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MaxScale/Documentation/Tutorials/MaxScale-Information-Schema.md
Markus Mäkelä a883a4f3e0 Fix password documentation 
The old parameter was used in some examples and no note about its removal
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# MaxInfo Plugin
The maxinfo plugin is a special router plugin similar to the one used for
implementing the server side component of the MaxAdmin interface. The plugin
is designed to return data regarding the internals of MariaDB MaxScale, it
provides an information schema approach to monitoring the internals of
MariaDB MaxScale itself.
The plugin is capable of returning data in one of two ways, either as MySQL
result sets or as JSON encoded data. The choice of which mechanism used to
return the data is determined by the type of the request the router
receives. If a MySQL command is received then the router will return the
results as a MySQL result set, if an HTTP request is received then the data
will be returned as a JSON document.
# Configuration
The plugin is configured in the `maxscale.cnf` configuration file in much
the same way as any other router service is configured; there must be a
service section in the configuration file and also listeners defined for
that service. The service does not however require any backend servers to be
associated with it, or any monitors.
The service entry should define the service name, the type as service and
the router module to load. The specified user, with the password (plain or
encrypted via maxpassword utility) is allowed to connect via MySQL
protocol. Currently the user can connect to maxinfo from any remote IP and
to localhost as well.
```
[MaxInfo]
type=service
router=maxinfo
user=monitor
password=my_secret
```
The listener section defines the protocol, port and other information needed
to create a listener for the service. To listen on a port using the MySQL
protocol a section as shown below should be added to the configuration
file.
In this example we use a cleartext password `my_secret`. For increased
security the password can be encrypted as explained
[here](../Getting-Started/Configuration-Guide.md#encrypting-passwords).
```
[MaxInfo Listener]
type=listener
service=MaxInfo
protocol=MariaDBClient
port=9003
```
To listen with the HTTP protocol and hence return JSON documents a section
as shown below is required.
```
[MaxInfo JSON Listener]
type=listener
service=MaxInfo
protocol=HTTPD
port=8003
```
If both the MySQL and JSON responses are required then a single service can
be configured with both types of listener.
As with any other listeners within MariaDB MaxScale the listeners can be
bound to a particular interface by use of the address= parameter. This
allows the access to the maxinfo data to be limited to the localhost by
adding an address=localhost parameter in the configuration file.
```
[MaxInfo Listener]
type=listener
service=MaxInfo
protocol=MariaDBClient
address=localhost
port=9003
```
# MySQL Interface to maxinfo
The maxinfo supports a small subset of SQL statements in addition to the
MySQL status and ping requests. These may be used for simple monitoring of
MariaDB MaxScale.
```
% mysqladmin -hmaxscale.mariadb.com -P9003 -umonitor -pmy_secret ping
mysqld is alive
% mysqladmin -hmaxscale.mariadb.com -P9003 -umonitor -pmy_secret status
Uptime: 72 Threads: 1 Sessions: 11
%
```
The SQL command used to interact with maxinfo is the show command, a variety
of show commands are available and will be described in the following
sections.
Maxinfo also supports the `FLUSH LOGS`, `SET SERVER <name> <status>` and
`CLEAR SERVER <name> <status>` commands. These behave the same as their
MaxAdmin counterpart.
## Show variables
The show variables command will display a set of name and value pairs for a
number of MariaDB MaxScale system variables.
```
mysql> show variables;
+--------------------+-------------------------+
| Variable_name | Value |
+--------------------+-------------------------+
| version | 1.0.6-unstable |
| version_comment | MariaDB MaxScale |
| basedir | /home/mriddoch/skygate2 |
| MAXSCALE_VERSION | 1.0.6-unstable |
| MAXSCALE_THREADS | 1 |
| MAXSCALE_NBPOLLS | 3 |
| MAXSCALE_POLLSLEEP | 1000 |
| MAXSCALE_UPTIME | 223 |
| MAXSCALE_SESSIONS | 11 |
+--------------------+-------------------------+
9 rows in set (0.02 sec)
mysql>
```
The show variables command can also accept a limited like clause. This like
clause must either be a literal string to match, a pattern starting with a
%, a pattern ending with a % or a string with a % at both the start and the
end.
```
mysql> show variables like 'version';
+---------------+----------------+
| Variable_name | Value |
+---------------+----------------+
| version | 1.0.6-unstable |
+---------------+----------------+
1 row in set (0.02 sec)
mysql> show variables like 'version%';
+-----------------+------------------+
| Variable_name | Value |
+-----------------+------------------+
| version | 1.0.6-unstable |
| version_comment | MariaDB MaxScale |
+-----------------+------------------+
2 rows in set (0.02 sec)
mysql> show variables like '%comment';
+-----------------+------------------+
| Variable_name | Value |
+-----------------+------------------+
| version_comment | MariaDB MaxScale |
+-----------------+------------------+
1 row in set (0.02 sec)
mysql> show variables like '%ers%';
+------------------+------------------+
| Variable_name | Value |
+------------------+------------------+
| version | 1.0.6-unstable |
| version_comment | MariaDB MaxScale |
| MAXSCALE_VERSION | 1.0.6-unstable |
+------------------+------------------+
3 rows in set (0.02 sec)
mysql>
```
## Show status
The show status command displays a set of status counters, as with show
variables the show status command can be passed a simplified like clause to
limit the values returned.
```
mysql> show status;
+---------------------------+-------+
| Variable_name | Value |
+---------------------------+-------+
| Uptime | 156 |
| Uptime_since_flush_status | 156 |
| Threads_created | 1 |
| Threads_running | 1 |
| Threadpool_threads | 1 |
| Threads_connected | 11 |
| Connections | 11 |
| Client_connections | 2 |
| Backend_connections | 0 |
| Listeners | 9 |
| Zombie_connections | 0 |
| Internal_descriptors | 2 |
| Read_events | 22 |
| Write_events | 24 |
| Hangup_events | 0 |
| Error_events | 0 |
| Accept_events | 2 |
| Event_queue_length | 1 |
| Pending_events | 0 |
| Max_event_queue_length | 1 |
| Max_event_queue_time | 0 |
| Max_event_execution_time | 0 |
+---------------------------+-------+
22 rows in set (0.02 sec)
mysql>
```
## Show services
The show services command will return a set of basic statistics regarding
each of the configured services within MariaDB MaxScale.
```
mysql> show services;
+----------------+----------------+--------------+----------------+
| Service Name | Router Module | No. Sessions | Total Sessions |
+----------------+----------------+--------------+----------------+
| Test Service | readconnroute | 1 | 1 |
| Split Service | readwritesplit | 1 | 1 |
| Filter Service | readconnroute | 1 | 1 |
| Named Service | readwritesplit | 1 | 1 |
| QLA Service | readconnroute | 1 | 1 |
| Debug Service | debugcli | 1 | 1 |
| CLI | cli | 1 | 1 |
| MaxInfo | maxinfo | 4 | 4 |
+----------------+----------------+--------------+----------------+
8 rows in set (0.02 sec)
mysql>
```
The show services command does not accept a like clause and will ignore any
like clause that is given.
## Show listeners
The show listeners command will return a set of status information for every
listener defined within the MariaDB MaxScale configuration file.
```
mysql> show listeners;
+----------------+-----------------+-----------+------+---------+
| Service Name | Protocol Module | Address | Port | State |
+----------------+-----------------+-----------+------+---------+
| Test Service | MariaDBClient | * | 4006 | Running |
| Split Service | MariaDBClient | * | 4007 | Running |
| Filter Service | MariaDBClient | * | 4008 | Running |
| Named Service | MariaDBClient | * | 4010 | Running |
| QLA Service | MariaDBClient | * | 4009 | Running |
| Debug Service | telnetd | localhost | 4242 | Running |
| CLI | maxscaled | localhost | 6603 | Running |
| MaxInfo | MariaDBClient | * | 9003 | Running |
| MaxInfo | HTTPD | * | 8003 | Running |
+----------------+-----------------+-----------+------+---------+
9 rows in set (0.02 sec)
mysql>
```
The show listeners command will ignore any like clause passed to it.
## Show sessions
The show sessions command returns information on every active session within
MariaDB MaxScale. It will ignore any like clause passed to it.
```
mysql> show sessions;
+-----------+---------------+----------------+---------------------------+
| Session | Client | Service | State |
+-----------+---------------+----------------+---------------------------+
| 0x1a92a60 | 127.0.0.1 | MaxInfo | Session ready for routing |
| 0x1a92100 | 80.240.130.35 | MaxInfo | Session ready for routing |
| 0x1a76a00 | | MaxInfo | Listener Session |
| 0x1a76020 | | MaxInfo | Listener Session |
| 0x1a75d40 | | CLI | Listener Session |
| 0x1a75220 | | Debug Service | Listener Session |
| 0x1a774b0 | | QLA Service | Listener Session |
| 0x1a78630 | | Named Service | Listener Session |
| 0x1a60270 | | Filter Service | Listener Session |
| 0x1a606f0 | | Split Service | Listener Session |
| 0x19b0380 | | Test Service | Listener Session |
+-----------+---------------+----------------+---------------------------+
11 rows in set (0.02 sec)
mysql>
```
## Show clients
The show clients command reports a row for every client application
connected to MariaDB MaxScale. `Like` clauses cannot be used in the show
clients command.
```
mysql> show clients;
+-----------+---------------+---------+---------------------------+
| Session | Client | Service | State |
+-----------+---------------+---------+---------------------------+
| 0x1a92a60 | 127.0.0.1 | MaxInfo | Session ready for routing |
| 0x1a92100 | 80.240.130.35 | MaxInfo | Session ready for routing |
+-----------+---------------+---------+---------------------------+
2 rows in set (0.02 sec)
mysql>
```
## Show servers
The show servers command returns data for each backend server configured
within the MariaDB MaxScale configuration file. This data includes the
current number of connections MariaDB MaxScale has to that server and the
state of that server as monitored by MariaDB MaxScale.
```
mysql> show servers;
+---------+-----------+------+-------------+---------+
| Server | Address | Port | Connections | Status |
+---------+-----------+------+-------------+---------+
| server1 | 127.0.0.1 | 3306 | 0 | Running |
| server2 | 127.0.0.1 | 3307 | 0 | Down |
| server3 | 127.0.0.1 | 3308 | 0 | Down |
| server4 | 127.0.0.1 | 3309 | 0 | Down |
+---------+-----------+------+-------------+---------+
4 rows in set (0.02 sec)
mysql>
```
## Show modules
The show modules command reports the information on the modules currently
loaded into MariaDB MaxScale. This includes the name type and version of
each module. It also includes the API version the module has been written
against and the current release status of the module.
```
mysql> show modules;
+----------------+-------------+---------+-------------+----------------+
| Module Name | Module Type | Version | API Version | Status |
+----------------+-------------+---------+-------------+----------------+
| HTTPD | Protocol | V1.0.1 | 1.0.0 | In Development |
| maxscaled | Protocol | V1.0.0 | 1.0.0 | GA |
| telnetd | Protocol | V1.0.1 | 1.0.0 | GA |
| MariaDBClient | Protocol | V1.0.0 | 1.0.0 | GA |
| mariadbmon | Monitor | V1.4.0 | 1.0.0 | GA |
| readwritesplit | Router | V1.0.2 | 1.0.0 | GA |
| readconnroute | Router | V1.1.0 | 1.0.0 | GA |
| debugcli | Router | V1.1.1 | 1.0.0 | GA |
| cli | Router | V1.0.0 | 1.0.0 | GA |
| maxinfo | Router | V1.0.0 | 1.0.0 | Alpha |
+----------------+-------------+---------+-------------+----------------+
10 rows in set (0.02 sec)
mysql>
```
## Show monitors
The show monitors command reports each monitor configured within the system
and the state of that monitor.
```
mysql> show monitors;
+---------------+---------+
| Monitor | Status |
+---------------+---------+
| MySQL Monitor | Running |
+---------------+---------+
1 row in set (0.02 sec)
mysql>
```
## Show eventTimes
The show eventTimes command returns a table of statistics that reflect the
performance of the event queuing and execution portion of the MariaDB
MaxScale core.
```
mysql> show eventTimes;
+---------------+-------------------+---------------------+
| Duration | No. Events Queued | No. Events Executed |
+---------------+-------------------+---------------------+
| < 100ms | 460 | 456 |
| 100 - 200ms | 0 | 3 |
| 200 - 300ms | 0 | 0 |
| 300 - 400ms | 0 | 0 |
| 400 - 500ms | 0 | 0 |
| 500 - 600ms | 0 | 0 |
| 600 - 700ms | 0 | 0 |
| 700 - 800ms | 0 | 0 |
| 800 - 900ms | 0 | 0 |
| 900 - 1000ms | 0 | 0 |
| 1000 - 1100ms | 0 | 0 |
| 1100 - 1200ms | 0 | 0 |
| 1200 - 1300ms | 0 | 0 |
| 1300 - 1400ms | 0 | 0 |
| 1400 - 1500ms | 0 | 0 |
| 1500 - 1600ms | 0 | 0 |
| 1600 - 1700ms | 0 | 0 |
| 1700 - 1800ms | 0 | 0 |
| 1800 - 1900ms | 0 | 0 |
| 1900 - 2000ms | 0 | 0 |
| 2000 - 2100ms | 0 | 0 |
| 2100 - 2200ms | 0 | 0 |
| 2200 - 2300ms | 0 | 0 |
| 2300 - 2400ms | 0 | 0 |
| 2400 - 2500ms | 0 | 0 |
| 2500 - 2600ms | 0 | 0 |
| 2600 - 2700ms | 0 | 0 |
| 2700 - 2800ms | 0 | 0 |
| 2800 - 2900ms | 0 | 0 |
| > 3000ms | 0 | 0 |
+---------------+-------------------+---------------------+
30 rows in set (0.02 sec)
mysql>
```
Each row represents a time interval, in 100ms increments, with the counts
representing the number of events that were in the event queue for the
length of time that row represents and the number of events that were
executing at the time indicated by the row.
# JSON Interface
The simplified JSON interface takes the URL of the request made to maxinfo
and maps that to a show command in the above section.
## Variables
The /variables URL will return the MariaDB MaxScale variables, these
variables can not be filtered via this interface.
```
$ curl http://maxscale.mariadb.com:8003/variables
[ { "Variable_name" : "version", "Value" : "1.0.6-unstable"},
{ "Variable_name" : "version_comment", "Value" : "MariaDB MaxScale"},
{ "Variable_name" : "basedir", "Value" : "/home/mriddoch/skygate2"},
{ "Variable_name" : "MAXSCALE_VERSION", "Value" : "1.0.6-unstable"},
{ "Variable_name" : "MAXSCALE_THREADS", "Value" : 1},
{ "Variable_name" : "MAXSCALE_NBPOLLS", "Value" : 3},
{ "Variable_name" : "MAXSCALE_POLLSLEEP", "Value" : 1000},
{ "Variable_name" : "MAXSCALE_UPTIME", "Value" : 3948},
{ "Variable_name" : "MAXSCALE_SESSIONS", "Value" : 12}]
$
```
## Status
Use of the /status URI will return the status information that would
normally be returned by the show status command. No filtering of the status
information is available via this interface
```
$ curl http://maxscale.mariadb.com:8003/status
[ { "Variable_name" : "Uptime", "Value" : 3831},
{ "Variable_name" : "Uptime_since_flush_status", "Value" : 3831},
{ "Variable_name" : "Threads_created", "Value" : 1},
{ "Variable_name" : "Threads_running", "Value" : 1},
{ "Variable_name" : "Threadpool_threads", "Value" : 1},
{ "Variable_name" : "Threads_connected", "Value" : 12},
{ "Variable_name" : "Connections", "Value" : 12},
{ "Variable_name" : "Client_connections", "Value" : 3},
{ "Variable_name" : "Backend_connections", "Value" : 0},
{ "Variable_name" : "Listeners", "Value" : 9},
{ "Variable_name" : "Zombie_connections", "Value" : 0},
{ "Variable_name" : "Internal_descriptors", "Value" : 3},
{ "Variable_name" : "Read_events", "Value" : 469},
{ "Variable_name" : "Write_events", "Value" : 479},
{ "Variable_name" : "Hangup_events", "Value" : 12},
{ "Variable_name" : "Error_events", "Value" : 0},
{ "Variable_name" : "Accept_events", "Value" : 15},
{ "Variable_name" : "Event_queue_length", "Value" : 1},
{ "Variable_name" : "Pending_events", "Value" : 0},
{ "Variable_name" : "Max_event_queue_length", "Value" : 1},
{ "Variable_name" : "Max_event_queue_time", "Value" : 0},
{ "Variable_name" : "Max_event_execution_time", "Value" : 1}]
$
```
## Services
The /services URI returns the data regarding the services defined within the
configuration of MariaDB MaxScale. Two counters are returned, the current
number of sessions attached to this service and the total number connected
since the service started.
```
$ curl http://maxscale.mariadb.com:8003/services
[ { "Service Name" : "Test Service", "Router Module" : "readconnroute", "No. Sessions" : 1, "Total Sessions" : 1},
{ "Service Name" : "Split Service", "Router Module" : "readwritesplit", "No. Sessions" : 1, "Total Sessions" : 1},
{ "Service Name" : "Filter Service", "Router Module" : "readconnroute", "No. Sessions" : 1, "Total Sessions" : 1},
{ "Service Name" : "Named Service", "Router Module" : "readwritesplit", "No. Sessions" : 1, "Total Sessions" : 1},
{ "Service Name" : "QLA Service", "Router Module" : "readconnroute", "No. Sessions" : 1, "Total Sessions" : 1},
{ "Service Name" : "Debug Service", "Router Module" : "debugcli", "No. Sessions" : 1, "Total Sessions" : 1},
{ "Service Name" : "CLI", "Router Module" : "cli", "No. Sessions" : 1, "Total Sessions" : 1},
{ "Service Name" : "MaxInfo", "Router Module" : "maxinfo", "No. Sessions" : 5, "Total Sessions" : 20}]
$
```
## Listeners
The /listeners URI will return a JSON array with one entry per listener,
each entry is a JSON object that describes the configuration and state of
that listener.
```
$ curl http://maxscale.mariadb.com:8003/listeners
[ { "Service Name" : "Test Service", "Protocol Module" : "MariaDBClient", "Address" : "*", "Port" : 4006, "State" : "Running"},
{ "Service Name" : "Split Service", "Protocol Module" : "MariaDBClient", "Address" : "*", "Port" : 4007, "State" : "Running"},
{ "Service Name" : "Filter Service", "Protocol Module" : "MariaDBClient", "Address" : "*", "Port" : 4008, "State" : "Running"},
{ "Service Name" : "Named Service", "Protocol Module" : "MariaDBClient", "Address" : "*", "Port" : 4010, "State" : "Running"},
{ "Service Name" : "QLA Service", "Protocol Module" : "MariaDBClient", "Address" : "*", "Port" : 4009, "State" : "Running"},
{ "Service Name" : "Debug Service", "Protocol Module" : "telnetd", "Address" : "localhost", "Port" : 4242, "State" : "Running"},
{ "Service Name" : "CLI", "Protocol Module" : "maxscaled", "Address" : "localhost", "Port" : 6603, "State" : "Running"},
{ "Service Name" : "MaxInfo", "Protocol Module" : "MariaDBClient", "Address" : "*", "Port" : 9003, "State" : "Running"},
{ "Service Name" : "MaxInfo", "Protocol Module" : "HTTPD", "Address" : "*", "Port" : 8003, "State" : "Running"}]
$
```
## Modules
The /modules URI returns data for each plugin that has been loaded into
MariaDB MaxScale. The plugin name, type and version are returned as is the
version of the plugin API that the plugin was built against and the release
status of the plugin.
```
$ curl http://maxscale.mariadb.com:8003/modules
[ { "Module Name" : "HTTPD", "Module Type" : "Protocol", "Version" : "V1.2.0", "API Version" : "1.1.0", "Status" : "In Development"},
{ "Module Name" : "maxscaled", "Module Type" : "Protocol", "Version" : "V2.0.0", "API Version" : "1.1.0", "Status" : "GA"},
{ "Module Name" : "mariadbclient", "Module Type" : "Protocol", "Version" : "V1.1.0", "API Version" : "1.1.0", "Status" : "GA"},
{ "Module Name" : "mariadbmon", "Module Type" : "Monitor", "Version" : "V1.5.0", "API Version" : "3.0.0", "Status" : "GA"},
{ "Module Name" : "readwritesplit", "Module Type" : "Router", "Version" : "V1.1.0", "API Version" : "2.0.0", "Status" : "GA"},
{ "Module Name" : "readconnroute", "Module Type" : "Router", "Version" : "V1.1.0", "API Version" : "2.0.0", "Status" : "GA"},
{ "Module Name" : "cli", "Module Type" : "Router", "Version" : "V1.0.0", "API Version" : "2.0.0", "Status" : "GA"},
{ "Module Name" : "maxinfo", "Module Type" : "Router", "Version" : "V1.0.0", "API Version" : "2.0.0", "Status" : "Alpha"}]
$
```
## Sessions
The /sessions URI returns a JSON array with an object for each active
session within MariaDB MaxScale.
```
$ curl http://maxscale.mariadb.com:8003/sessions
[ { "Session" : "0x1a8e9a0", "Client" : "80.176.79.245", "Service" : "MaxInfo", "State" : "Session ready for routing"},
{ "Session" : "0x1a8e6d0", "Client" : "80.240.130.35", "Service" : "MaxInfo", "State" : "Session ready for routing"},
{ "Session" : "0x1a8ddd0", "Client" : , "Service" : "MaxInfo", "State" : "Listener Session"},
{ "Session" : "0x1a92da0", "Client" : , "Service" : "MaxInfo", "State" : "Listener Session"},
{ "Session" : "0x1a92ac0", "Client" : , "Service" : "CLI", "State" : "Listener Session"},
{ "Session" : "0x1a70e90", "Client" : , "Service" : "Debug Service", "State" : "Listener Session"},
{ "Session" : "0x1a758d0", "Client" : , "Service" : "QLA Service", "State" : "Listener Session"},
{ "Session" : "0x1a73a90", "Client" : , "Service" : "Named Service", "State" : "Listener Session"},
{ "Session" : "0x1a5c0b0", "Client" : , "Service" : "Filter Service", "State" : "Listener Session"},
{ "Session" : "0x1a5c530", "Client" : , "Service" : "Split Service", "State" : "Listener Session"},
{ "Session" : "0x19ac1c0", "Client" : , "Service" : "Test Service", "State" : "Listener Session"}]
$
```
## Clients
The /clients URI is a limited version of the /sessions, in this case it only
returns an entry for a session that represents a client connection.
```
$ curl http://maxscale.mariadb.com:8003/clients
[ { "Session" : "0x1a90be0", "Client" : "80.176.79.245", "Service" : "MaxInfo", "State" : "Session ready for routing"},
{ "Session" : "0x1a8e9a0", "Client" : "127.0.0.1", "Service" : "MaxInfo", "State" : "Session ready for routing"},
{ "Session" : "0x1a8e6d0", "Client" : "80.240.130.35", "Service" : "MaxInfo", "State" : "Session ready for routing"}]
$
```
## Servers
The /servers URI is used to retrieve information for each of the servers
defined within the MariaDB MaxScale configuration. This information includes
the connection count and the current status as monitored by MariaDB
MaxScale. The connection count is only those connections made by MariaDB
MaxScale to those servers.
```
$ curl http://maxscale.mariadb.com:8003/servers
[ { "Server" : "server1", "Address" : "127.0.0.1", "Port" : 3306, "Connections" : 0, "Status" : "Running"},
{ "Server" : "server2", "Address" : "127.0.0.1", "Port" : 3307, "Connections" : 0, "Status" : "Down"},
{ "Server" : "server3", "Address" : "127.0.0.1", "Port" : 3308, "Connections" : 0, "Status" : "Down"},
{ "Server" : "server4", "Address" : "127.0.0.1", "Port" : 3309, "Connections" : 0, "Status" : "Down"}]
$
```
## Event Times
The /event/times URI returns an array of statistics that reflect the
performance of the event queuing and execution portion of the MariaDB
MaxScale core. Each element is an object that represents a time bucket, in
100ms increments, with the counts representing the number of events that
were in the event queue for the length of time that row represents and the
number of events that were executing of the time indicated by the object.
```
$ curl http://maxscale.mariadb.com:8003/event/times
[ { "Duration" : "< 100ms", "No. Events Queued" : 64, "No. Events Executed" : 63},
{ "Duration" : " 100 - 200ms", "No. Events Queued" : 0, "No. Events Executed" : 0},
{ "Duration" : " 200 - 300ms", "No. Events Queued" : 0, "No. Events Executed" : 0},
{ "Duration" : " 300 - 400ms", "No. Events Queued" : 0, "No. Events Executed" : 0},
{ "Duration" : " 400 - 500ms", "No. Events Queued" : 0, "No. Events Executed" : 0},
{ "Duration" : " 500 - 600ms", "No. Events Queued" : 0, "No. Events Executed" : 0},
{ "Duration" : " 600 - 700ms", "No. Events Queued" : 0, "No. Events Executed" : 0},
{ "Duration" : " 700 - 800ms", "No. Events Queued" : 0, "No. Events Executed" : 0},
{ "Duration" : " 800 - 900ms", "No. Events Queued" : 0, "No. Events Executed" : 0},
{ "Duration" : " 900 - 1000ms", "No. Events Queued" : 0, "No. Events Executed" : 0},
{ "Duration" : "1000 - 1100ms", "No. Events Queued" : 0, "No. Events Executed" : 0},
{ "Duration" : "1100 - 1200ms", "No. Events Queued" : 0, "No. Events Executed" : 0},
{ "Duration" : "1200 - 1300ms", "No. Events Queued" : 0, "No. Events Executed" : 0},
{ "Duration" : "1300 - 1400ms", "No. Events Queued" : 0, "No. Events Executed" : 0},
{ "Duration" : "1400 - 1500ms", "No. Events Queued" : 0, "No. Events Executed" : 0},
{ "Duration" : "1500 - 1600ms", "No. Events Queued" : 0, "No. Events Executed" : 0},
{ "Duration" : "1600 - 1700ms", "No. Events Queued" : 0, "No. Events Executed" : 0},
{ "Duration" : "1700 - 1800ms", "No. Events Queued" : 0, "No. Events Executed" : 0},
{ "Duration" : "1800 - 1900ms", "No. Events Queued" : 0, "No. Events Executed" : 0},
{ "Duration" : "1900 - 2000ms", "No. Events Queued" : 0, "No. Events Executed" : 0},
{ "Duration" : "2000 - 2100ms", "No. Events Queued" : 0, "No. Events Executed" : 0},
{ "Duration" : "2100 - 2200ms", "No. Events Queued" : 0, "No. Events Executed" : 0},
{ "Duration" : "2200 - 2300ms", "No. Events Queued" : 0, "No. Events Executed" : 0},
{ "Duration" : "2300 - 2400ms", "No. Events Queued" : 0, "No. Events Executed" : 0},
{ "Duration" : "2400 - 2500ms", "No. Events Queued" : 0, "No. Events Executed" : 0},
{ "Duration" : "2500 - 2600ms", "No. Events Queued" : 0, "No. Events Executed" : 0},
{ "Duration" : "2600 - 2700ms", "No. Events Queued" : 0, "No. Events Executed" : 0},
{ "Duration" : "2700 - 2800ms", "No. Events Queued" : 0, "No. Events Executed" : 0},
{ "Duration" : "2800 - 2900ms", "No. Events Queued" : 0, "No. Events Executed" : 0},
{ "Duration" : "> 3000ms", "No. Events Queued" : 0, "No. Events Executed" : 0}]
```
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