colleges!
I really need to use wildcard in perf_counter.
We have .NET Data Provider for SqlServer counters. Unfortunately, the ID on counter changes after each reboot.
Right now I have counter like this:
perf_counter["\.NET Data Provider for SqlServer(_lm_w3svc_3_root-3-131958133162924330[18196])\NumberOfActiveConnectionPools"]
How can I use it permanently. Maybe I need to use a wildcard like this:
perf_counter["\.NET Data Provider for SqlServer(_lm_w3svc_3_root-3-131958133162924330[*])\NumberOfActiveConnectionPools"]
The counter became unsupported with "Cannot obtain performance information from collector".
I really need your help!
Thank you and have a nice day!
The documentation doesn't mention wildcards with performance counters.
If your counter changes at every reboot you need to use a discovery rule even if you're dealing with a single item.
The discovery rule could be a powershell script like:
$result = #{}
$result.data = #()
(get-counter -Listset *).paths | ForEach-Object {
if ($_ -Like "*_lm_w3svc_3_root-3-131958133162924330*\NumberOfActiveConnectionPools") {
$result.data += #{
"{#PATH}" = $_
}
}
}
$result | ConvertTo-Json
Set it to run every hour or less and create an item prototype like perf_counter["{#PATH}"], this should do the trick.
Related
I have data which are stored in 3 different application insights resources, thanks to query across resource feature added last year (https://azure.microsoft.com/en-us/blog/query-across-resources/) was possible to query those 3 application insights at once with app identifier.
I'm trying to execute this query through app insights REST API : https://dev.applicationinsights.io (app insights REST API) for a very basic need from a static HTML page (no backend)
but without luck
I do suspect that app identifier isn't supported, it is actually the case ? any workaround for my use case (no backend).
Here is an example with the query in the body. My queries are quite complex and have a lot of let statements and therefore passing the query in the body is easier. There are some PowerShell quirks in the example below, but I'll update with a C# example tomorrow.
The let statement in the example below is pretty pointless, it's mostly there to show that you can do complex queries with let expressions etc.
AppId is the Application Insights resource ID - and NOT the instrumentation key. The API key is just a long string and you can create up to 10 of them AFAIK.
You will find both the id and keys under API Access (I've added a screenshot as it's easy to get them confused). When you use the app() function use the app id.
$app1Id = "GUID"
$app2Id = "GUID"
$app1Key = "string"
$app2Key = "string"
# EXAMPLE: "X-Api-Key" = "key1:GUID1,key2:GUID2"
$headers = #{ "X-Api-Key" = "${app1Key}:$app1Id,${app2Key}:$app2Id"; "Content-Type" = "application/json" }
# EXAMPLE: "query" = "union app('GUID1').something, app('GUID2').something | limit 5"
$query = #{"query" = "let days=1d;union app('$app1Id').exceptions,app('$app2Id').exceptions | where timestamp > ago(days)"}
$body = ConvertTo-Json $query | % { [regex]::Unescape($_) }
$result = Invoke-RestMethod "https://api.applicationinsights.io/v1/apps/$app1Id/query" -H $headers -Body $body -Method POST
The query above will return all the exceptions for the two Application insights resources for the last day. You can do a query across 10 resources at the time of writing, 200 requests per 30 seconds or a max of 86,400 requests per day (UTC). Other limits apply if you use ADD.
NOTE: the extra {} in the header is a PowerShell quirk in regards to variables and the use of the colon char, and as you can see in the example you should not bracket the keys in the header :)
Checked with the dev team that owns that service:
You should be able to put the api key in as apiKey1:appId1,apiKey2:appId2 in the api key box and this should work.
the [object ProgressEvent] response is a bug in the explorer that should have really showed you an error.
And as a workaround, you could always do the queries inside the azure portal itself in workbooks for any of the AI resources, or hypothetically also from the analytics portal for any of the AI resources, and those wouldn't require the API key at all, if all you needed was to see the data.
Is there a simple way to prove if a network adapter is working? Perhaps some IP like localhost (127.0.0.1) which is always available regardless of which network I'm connected to; only one that only shows if my wireless network adapter's working? Or perhaps there's some simple diagnostic check to confirm this?
I've tagged this question as PowerShell as that's my preferred language; but I can figure out ways to integrate with any other solutions which may be suggested.
Tried so far
I thought of checking the adapter's properties and found there is a status and an IP; I figured that if there were an assigned IP or a connected status that would prove that all's working; sadly those properties are blank and unknown, so I can't use them.
$adapter = Get-WmiObject -Class Win32_NetworkAdapter | Where-Object {$_.Name -like '*Wireless*'}
$adapter.Status #returns 2; i.e. unknown
$adapter.NetworkAddresses #is blank
Background
I have an issue where I hibernate my laptop whilst docked then bring it back online no longer docked it loses its wireless connection and requires that the adapter be restarted. The same issue is mentioned in this post: Command/Powershell script to reset a network adapter
I'm hoping to use the above code to automatically resolve the issue by scheduling a task to run when my computer comes out of suspension (e.g. https://superuser.com/a/149924/156700).
Sometimes I'll be on my home network, where the only device to ping is my router, sometimes I'll be on my office network where there's a range of machines I could ping, and sometimes I'll be elsewhere... so determining a good target candidate to test whether my network adapter needs a restart by pinging some external device is more complex than ideal.
I want to run a test before resetting so that I only reset when required. It will also be useful to check once a reset has completed should I wish to queue other tasks which require network presence to complete.
It seems the WMI class Win32_NetworkAdapter has an Availability property.
https://msdn.microsoft.com/en-us/library/aa394216(v=vs.85).aspx
There are a range of values which could represent "working"; for now I've gone with only status 3; i.e. where everything's working 100% as expected / there's no concerns about potential degredation. That may be something worth amending depending on scenario.
function Test-NetworkAdapter {
[CmdletBinding()]
param (
[Parameter(Mandatory = $true)]
[string]$AdapterNameMask
,
[Parameter(Mandatory = $false)]
[int[]]$HealthyStatusses = #(3) #100% working on full power; for list of other possible values, see https://msdn.microsoft.com/en-us/library/aa387884(v=vs.85).aspx
)
process {
Get-WmiObject -Class Win32_NetworkAdapter `
| Where-Object {$_.Name -like $AdapterNameMask} `
| Select-Object #{Name='Working';Expression={$healthyStatusses -contains $_.Availability}}
}
}
function Reset-NetworkAdapter {
[CmdletBinding()]
param (
[Parameter(Mandatory = $true)]
[string]$AdapterNameMask
)
process {
Get-WmiObject -Class Win32_NetworkAdapter `
| Where-Object {$_.Name -like $AdapterNameMask} `
| %{ #in case multiple matches, loop through all
$_.Disable()
$_.Enable()
}
}
}
[string]$wirelessAdapterMask = '*Wireless*'
#I could probably improve this to cope better should there be multiple matches / only resetting those with issues... but for now this meets my requirement
if (-not (Test-NetworkAdapter $wirelessAdapterMask)) {
Reset-NetworkAdapter $wirelessAdapterMask
}
Is there any possible way to check which query is so CPU intensive in _sqlsrv2 process?
Something which give me information about executed query in that process in that moment.
Is there any way to terminate that query without killing _sqlsrv2 process?
I cannot find any official materials in that subject.
Thank You for any help.
You could look into client database-request caching.
Code examples below assume you have ABL access to the environment. If not you will have to use SQL instead but it shouldn't be to hard to "translate" the code below
I haven't used this a lot myself but I wouldn't be surprised if it has some impact on performance.
You need to start caching in the active connection. This can be done in the connection itself or remotely via VST tables (as long as your remote session is connected to the same database) so you need to be able to identify your connections. This can be done via the process ID.
Generally how to enable the caching:
/* "_myconnection" is your current connection. You shouldn't do this */
FIND _myconnection NO-LOCK.
FIND _connect WHERE _connect-usr = _myconnection._MyConn-userid.
/* Start caching */
_connect._Connect-CachingType = 3.
DISPLAY _connect WITH FRAME x1 SIDE-LABELS WIDTH 100 1 COLUMN.
/* End caching */
_connect._Connect-CachingType = 0.
You need to identify your process first, via top or another program.
Then you can do something like:
/* Assuming pid 21966 */
FIND FIRST _connect NO-LOCK WHERE _Connect._Connect-Pid = 21966 NO-ERROR.
IF AVAILABLE _Connect THEN
DISPLAY _connect.
You could also look at the _Connect-Type. It should be 'SQLC' for SQL connections.
FOR EACH _Connect NO-LOCK WHERE _Connect._connect-type = "SQLC":
DISPLAY _connect._connect-type.
END.
Best of all would be to do this in a separate environment. If you can't at least try it in a test environment first.
Here's a good guide.
You can use a Select like this:
select
c."_Connect-type",
c."_Connect-PID" as 'PID',
c."_connect-ipaddress" as 'IP',
c."_Connect-CacheInfo"
from
pub."_connect" c
where
c."_Connect-CacheInfo" is not null
But first you need to enable connection cache, follow this example
I am looking for more detailed information on how I can get the following caching behavior in Drupal 7.
I want a block that renders information I'm retrieving from an external service. As the block is rendered for many users I do not want to continually request data from that service, but instead cache the result. However, this data is relatively frequent to change, so I'd like to retrieve the latest data every 5 or 10 minutes, then cache it again.
Does anyone know how to achieve such caching behavior without writing too much of the code oneself? I also haven't found much in terms of good documentation on how to use caching in Drupal (7), so any pointers on that are appreciated as well.
Keep in mind that cache_get() does not actually check if an item is expired or not. So you need to use:
if (($cache = cache_get('your_cache_key')) && $cache->expire >= REQUEST_TIME) {
return $cache->data;
}
Also make sure to use the REQUEST_TIME constant rather than time() in D7.
The functions cache_set() and cache_get() are what you are looking for. cache_set() has an expire argument.
You can use them basically like this:
<?php
if ($cached_data = cache_get('your_cache_key')) {
// Return from cache.
return $cached_data->data;
}
// No or outdated cache entry, refresh data.
$data = _your_module_get_data_from_external_service();
// Save data in cache with 5min expiration time.
cache_set('your_cache_key', $data, 'cache', time() + 60 * 5);
return $data;
?>
Note: You can also use a different cache bin (see documentation links) but you need to create a corresponding cache table yourself as part of your schema.
I think this should be $cache->expire, not expires. I didn't have luck with this example if I'm setting REQUEST_TIME + 300 in cache_set() since $cache->expires will always be less than REQUEST_TIME. This works for me:
if (($cache = cache_get('your_cache_key', 'cache')) && (REQUEST_TIME < $cache->expire)) {
return $cache->data;
}
I have a page that displays some data. The source of the data is not Drupal nodes, so Views is of no use me:
function mymodule_main_page($arg1, $arg2, $arg3) {
$results = call_remote_api_and_get_lots_of_results($arg1, $arg2, $arg3);
return theme('mymodule_page', $results, $arg1, $arg2, $arg3);
}
My module also displays a block. The block purpose is to summarize the the results that were returned in the main page content (eg: Number of results: X, Number of pages: Y, etc)
/**
* Implementation of hook_block().
*/
function mymodule_block($op = 'list', $delta = 0, $edit = array()) {
switch ($op) {
case 'view':
if ($delta == 0) {
$block['subject'] = t('Results summary');
$block['content'] = theme('mymodule_results_summary');
}
break;
}
}
I need to avoid generating the results again. What is the best way for my block to access the results object returned in the function that drew the main page? Global or Static vars? Is there a module that exists that already attempts to solve this problem?
Very good and flexible solution is using drupal core functions cache_set and cache_get as ya.teck mentioned but extend its functionality with cacherouter module. You can specify cache storage engines and use memcache or shared memory for you cache. It doesn't use database for storing data and very fast.
In addition to the cache system that ya.teck mentions, a more simple way is to cache the entire block for x mins, hours, days. Drupal has a built in cache system for all blocks. You can see some of the settings at admin/settings/performance
Update:
The drupal way both core and contrib is to use a static variable an array or the actual variable and store the heavy lifting there. An example could be node_load, which stores all of the loaded nodes in an array so each node only needs to be loaded once during each request.
You may store your data by drupal cache system.
See cache_set and cache_get functions for more information.