Comments (18)
@burningalchemist Dang it, I gotta leave at about 4pm specifically today. xD I'll continue troubleshooting during the day, maybe a call tomorrow instead?
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No worries :) The version is SQL Server 14.0.2037.2
Additionally on INNER JOIN. I noticed that INNER JOIN is used in the example config so it can't be that SQL Exporter can't deal with it. But I see that it only appears under the "queries" property (like the below one) and then is referenced under the "query_ref" property of a metric:
queries:
# Populates `mssql_io_stall` and `mssql_io_stall_total`
- query_name: mssql_io_stall
query: |
SELECT
cast(DB_Name(a.database_id) as varchar) AS [db],
sum(io_stall_read_ms) / 1000.0 AS [read],
sum(io_stall_write_ms) / 1000.0 AS [write],
sum(io_stall) / 1000.0 AS io_stall
FROM
sys.dm_io_virtual_file_stats(null, null) a
INNER JOIN sys.master_files b ON a.database_id = b.database_id AND a.file_id = b.file_id
GROUP BY a.database_id
So I gave it a try and placed my complex query under that property and then referenced it with "query_ref", and now, I can at least see that the query hits the database - that didn't happen before. So this might work after all, just need to fiddle a bit with scrape timeouts since I'm getting the "context deadline exceeded" errors doing this.
EDIT: @burningalchemist So, this only worked once. Then I couldn't see the query anymore. But then I changed the query name and it worked again, but not after that. I tried a query without INNER JOIN and that worked giving results instantly. If adding an INNER JOIN I get nothing. Running the query in usql gives the result "IF 12", not sure what that means.
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Hey @jakob-reesalu, I commented on the logging stuff in the PR, please take a look.
As for the query issue, I'm happy to pair up to investigate and solve the issue. 👍 Could you share the message you get if you run the full query? If you like we can also hop on a call or something, as I don't really have MSSQL around to try things out on my side. What do you think?
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@burningalchemist Thanks a lot! I didn't try the full query iterating through all DBs as it takes 15+ mins. But when manipulating it to just do the first DB in the list (which takes 1 sec querying the DB server directly), I get no error, just an infomsg of the returned columns. Log level is debug.
I'm up for a call, just gotta have lunch first. When are you available and how to contact you? Maybe on Googlemeet?
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@jakob-reesalu Feel free to pick up the slot here: https://calendly.com/szyubin
I'm available roughly after 4pm today. Google Meet or Jitsi both should work. 👍
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@jakob-reesalu Yeah, tomorrow works too, also after 4pm unfortunately. But in the meantime, if could drop any intermediate results, that might be useful. 👍
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Could you drop me a screenshot from SQL Management Studio (with sensitive parts removed if there are any) for the full query you expect to run? I might have an idea. 👍
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@burningalchemist Alright! Here you go:
NOTE: There's a typo on AvgFragmentationInPREcent in the image but got that fixed
Here's the collector config:
# Similar to global.min_interval, but applies to the queries defined by this collector only.
min_interval: 3m
metrics:
- metric_name: index_fragmentation
type: gauge
help: 'Checks all databases with x, x and x tables, returns index fragmentation as percentage when its >5%. Query executed once a day.'
key_labels:
- Database
- Table
- Index
values: [AvgFragmentationInPercent]
query: |
-- Delete temp tables if exists
IF OBJECT_ID('tempdb.dbo.#tempDbList') IS NOT NULL
DROP TABLE #tempDbList
-- Put relevant database names in temp table
SELECT IDENTITY(INT,1,1) AS Id, Name INTO #tempDbList
FROM master.sys.databases WHERE
(Name LIKE '%data%' AND Name LIKE '%<productname>%' AND Name NOT LIKE '%log%' AND Name NOT LIKE '%archive%'
OR Name LIKE '%data%' AND Name LIKE '%<productname>%' AND Name NOT LIKE '%log%' AND Name NOT LIKE '%archive%')
-- Iterate through each database and all indexes in <tablename>, <tablename> and <tablename> tables.
DECLARE @currentId INT, @currentDb sysname, @dbCount INT, @sql NVARCHAR(max);
SELECT @currentId = 1, @dbCount = MAX(Id)
FROM #tempDbList
WHILE @currentId <= @dbCount
BEGIN
SELECT @currentDb = Name
FROM #tempDbList
WHERE Id = @currentId
-- Get results, indexes with >5% fragmentation, for each db
SELECT
DB_NAME(DDIPS.database_id) AS 'Database',
T.name AS 'Table',
I.name AS 'Index',
DDIPS.avg_fragmentation_in_percent AS 'AvgFragmentationInPercent'
FROM
sys.dm_db_index_physical_stats (DB_ID(@currentDb), NULL, NULL, NULL, NULL) AS DDIPS
INNER JOIN sys.tables T ON T.object_id = DDIPS.object_id
INNER JOIN sys.indexes I ON I.object_id = DDIPS.object_id
AND DDIPS.index_id = I.index_id
WHERE
DDIPS.database_id = DB_ID(@currentDb)
AND DDIPS.avg_fragmentation_in_percent > 5
AND (T.name = '<tablename>' OR
T.name = '<tablename>' OR
T.name = '<tablename>')
AND I.name IS NOT NULL
SET @currentId = @currentId + 1;
END
-- Cleanup
DROP TABLE #tempDbList
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@burningalchemist Having been away on lunch, letting the exporter run, I found a bunch of "context deadline exceeded" errors (this is the above posted query but set to only check 1 DB):
"index_fragmentation_checks" is the collector at issue
ts=2022-10-20T10:55:21.945Z caller=klog.go:84 level=debug func=Infof msg="Error gathering metrics: 2 error(s) occurred:\n* [from Gatherer #1] [collector=\"index_fragmentation_checks\"] context deadline exceeded\n* [from Gatherer #1] [collector=\"cleanup_jobs\"] context deadline exceeded"
ts=2022-10-20T10:57:16.926Z caller=klog.go:84 level=debug func=Infof msg="Error gathering metrics: 2 error(s) occurred:\n* [from Gatherer #1] [collector=\"cleanup_jobs\"] context deadline exceeded\n* [from Gatherer #1] [collector=\"index_fragmentation_checks\"] context deadline exceeded"
ts=2022-10-20T10:59:11.914Z caller=klog.go:84 level=debug func=Infof msg="Error gathering metrics: 2 error(s) occurred:\n* [from Gatherer #1] [collector=\"index_fragmentation_checks\"] context deadline exceeded\n* [from Gatherer #1] [collector=\"cleanup_jobs\"] context deadline exceeded"
ts=2022-10-20T11:01:06.890Z caller=klog.go:84 level=debug func=Infof msg="Error gathering metrics: 2 error(s) occurred:\n* [from Gatherer #1] [collector=\"index_fragmentation_checks\"] context deadline exceeded\n* [from Gatherer #1] [collector=\"cleanup_jobs\"] context deadline exceeded"
ts=2022-10-20T11:03:01.867Z caller=klog.go:84 level=debug func=Infof msg="Error gathering metrics: 2 error(s) occurred:\n* [from Gatherer #1] [collector=\"index_fragmentation_checks\"] context deadline exceeded\n* [from Gatherer #1] [collector=\"cleanup_jobs\"] context deadline exceeded"
ts=2022-10-20T11:04:56.857Z caller=klog.go:84 level=debug func=Infof msg="Error gathering metrics: 2 error(s) occurred:\n* [from Gatherer #1] [collector=\"index_fragmentation_checks\"] context deadline exceeded\n* [from Gatherer #1] [collector=\"cleanup_jobs\"] context deadline exceeded"
ts=2022-10-20T11:06:51.851Z caller=klog.go:84 level=debug func=Infof msg="Error gathering metrics: 2 error(s) occurred:\n* [from Gatherer #1] [collector=\"index_fragmentation_checks\"] context deadline exceeded\n* [from Gatherer #1] [collector=\"cleanup_jobs\"] context deadline exceeded"
ts=2022-10-20T11:08:46.840Z caller=klog.go:84 level=debug func=Infof msg="Error gathering metrics: 2 error(s) occurred:\n* [from Gatherer #1] [collector=\"index_fragmentation_checks\"] context deadline exceeded\n* [from Gatherer #1] [collector=\"cleanup_jobs\"] context deadline exceeded"
ts=2022-10-20T11:10:41.809Z caller=klog.go:84 level=debug func=Infof msg="Error gathering metrics: 2 error(s) occurred:\n* [from Gatherer #1] [collector=\"index_fragmentation_checks\"] context deadline exceeded\n* [from Gatherer #1] [collector=\"cleanup_jobs\"] context deadline exceeded"
ts=2022-10-20T11:12:36.791Z caller=klog.go:84 level=debug func=Infof msg="Error gathering metrics: 2 error(s) occurred:\n* [from Gatherer #1] [collector=\"index_fragmentation_checks\"] context deadline exceeded\n* [from Gatherer #1] [collector=\"cleanup_jobs\"] context deadline exceeded"
ts=2022-10-20T11:14:31.786Z caller=klog.go:84 level=debug func=Infof msg="Error gathering metrics: 2 error(s) occurred:\n* [from Gatherer #1] [collector=\"index_fragmentation_checks\"] context deadline exceeded\n* [from Gatherer #1] [collector=\"cleanup_jobs\"] context deadline exceeded"
ts=2022-10-20T11:16:26.760Z caller=klog.go:84 level=debug func=Infof msg="Error gathering metrics: 2 error(s) occurred:\n* [from Gatherer #1] [collector=\"index_fragmentation_checks\"] context deadline exceeded\n* [from Gatherer #1] [collector=\"cleanup_jobs\"] context deadline exceeded"
ts=2022-10-20T11:18:21.769Z caller=klog.go:84 level=debug func=Infof msg="Error gathering metrics: 2 error(s) occurred:\n* [from Gatherer #1] [collector=\"cleanup_jobs\"] context deadline exceeded\n* [from Gatherer #1] [collector=\"index_fragmentation_checks\"] context deadline exceeded"
ts=2022-10-20T11:20:16.738Z caller=klog.go:84 level=debug func=Infof msg="Error gathering metrics: 2 error(s) occurred:\n* [from Gatherer #1] [collector=\"index_fragmentation_checks\"] context deadline exceeded\n* [from Gatherer #1] [collector=\"cleanup_jobs\"] context deadline exceeded"
ts=2022-10-20T11:22:11.719Z caller=klog.go:84 level=debug func=Infof msg="Error gathering metrics: 2 error(s) occurred:\n* [from Gatherer #1] [collector=\"index_fragmentation_checks\"] context deadline exceeded\n* [from Gatherer #1] [collector=\"cleanup_jobs\"] context deadline exceeded"
ts=2022-10-20T11:24:06.700Z caller=klog.go:84 level=debug func=Infof msg="Error gathering metrics: 2 error(s) occurred:\n* [from Gatherer #1] [collector=\"index_fragmentation_checks\"] context deadline exceeded\n* [from Gatherer #1] [collector=\"cleanup_jobs\"] context deadline exceeded"
ts=2022-10-20T11:26:01.689Z caller=klog.go:84 level=debug func=Infof msg="Error gathering metrics: 2 error(s) occurred:\n* [from Gatherer #1] [collector=\"index_fragmentation_checks\"] context deadline exceeded\n* [from Gatherer #1] [collector=\"cleanup_jobs\"] context deadline exceeded"
ts=2022-10-20T11:27:56.678Z caller=klog.go:84 level=debug func=Infof msg="Error gathering metrics: 2 error(s) occurred:\n* [from Gatherer #1] [collector=\"index_fragmentation_checks\"] context deadline exceeded\n* [from Gatherer #1] [collector=\"cleanup_jobs\"] context deadline exceeded"
ts=2022-10-20T11:29:51.661Z caller=klog.go:84 level=debug func=Infof msg="Error gathering metrics: 2 error(s) occurred:\n* [from Gatherer #1] [collector=\"index_fragmentation_checks\"] context deadline exceeded\n* [from Gatherer #1] [collector=\"cleanup_jobs\"] context deadline exceeded"
ts=2022-10-20T11:31:46.646Z caller=klog.go:84 level=debug func=Infof msg="Error gathering metrics: 2 error(s) occurred:\n* [from Gatherer #1] [collector=\"index_fragmentation_checks\"] context deadline exceeded\n* [from Gatherer #1] [collector=\"cleanup_jobs\"] context deadline exceeded"
ts=2022-10-20T11:33:41.644Z caller=klog.go:84 level=debug func=Infof msg="Error gathering metrics: 2 error(s) occurred:\n* [from Gatherer #1] [collector=\"index_fragmentation_checks\"] context deadline exceeded\n* [from Gatherer #1] [collector=\"cleanup_jobs\"] context deadline exceeded"
ts=2022-10-20T11:35:36.608Z caller=klog.go:84 level=debug func=Infof msg="Error gathering metrics: 2 error(s) occurred:\n* [from Gatherer #1] [collector=\"index_fragmentation_checks\"] context deadline exceeded\n* [from Gatherer #1] [collector=\"cleanup_jobs\"] context deadline exceeded"
ts=2022-10-20T11:37:31.616Z caller=klog.go:84 level=debug func=Infof msg="Error gathering metrics: 2 error(s) occurred:\n* [from Gatherer #1] [collector=\"index_fragmentation_checks\"] context deadline exceeded\n* [from Gatherer #1] [collector=\"cleanup_jobs\"] context deadline exceeded"
ts=2022-10-20T11:39:26.585Z caller=klog.go:84 level=debug func=Infof msg="Error gathering metrics: 2 error(s) occurred:\n* [from Gatherer #1] [collector=\"index_fragmentation_checks\"] context deadline exceeded\n* [from Gatherer #1] [collector=\"cleanup_jobs\"] context deadline exceeded"
Then afterwards getting these messages, without errors:
ts=2022-10-20T11:40:01.892Z caller=klog.go:55 level=debug func=Verbose.Infof msg="[collector=\"cleanup_jobs\"] Returning cached metrics: min_interval=86400.000s cache_age=2929.098s"
ts=2022-10-20T11:40:01.895Z caller=klog.go:55 level=debug func=Verbose.Infof msg="[collector=\"index_fragmentation_checks\"] Collecting fresh metrics: min_interval=180.000s cache_age=2929.098s"
ts=2022-10-20T11:40:02.280Z caller=klog.go:55 level=debug func=Verbose.Infof msg="returned_columns=\"[Database Table Index AvgFragmentationInPercent]\"collector=\"index_fragmentation_checks\", query=\"index_fragmentation\""
ts=2022-10-20T11:40:36.044Z caller=klog.go:55 level=debug func=Verbose.Infof msg="[collector=\"index_fragmentation_checks\"] Returning cached metrics: min_interval=180.000s cache_age=63.980s"
ts=2022-10-20T11:40:36.044Z caller=klog.go:55 level=debug func=Verbose.Infof msg="[collector=\"cleanup_jobs\"] Returning cached metrics: min_interval=86400.000s cache_age=2993.078s"
ts=2022-10-20T11:41:27.066Z caller=klog.go:55 level=debug func=Verbose.Infof msg="[collector=\"index_fragmentation_checks\"] Returning cached metrics: min_interval=180.000s cache_age=115.009s"
ts=2022-10-20T11:41:27.066Z caller=klog.go:55 level=debug func=Verbose.Infof msg="[collector=\"cleanup_jobs\"] Returning cached metrics: min_interval=86400.000s cache_age=3044.109s"
ts=2022-10-20T11:43:22.060Z caller=klog.go:55 level=debug func=Verbose.Infof msg="[collector=\"index_fragmentation_checks\"] Collecting fresh metrics: min_interval=180.000s cache_age=230.024s"
ts=2022-10-20T11:43:22.060Z caller=klog.go:55 level=debug func=Verbose.Infof msg="[collector=\"cleanup_jobs\"] Returning cached metrics: min_interval=86400.000s cache_age=3159.122s"
ts=2022-10-20T11:43:22.092Z caller=klog.go:55 level=debug func=Verbose.Infof msg="returned_columns=\"[Database Table Index AvgFragmentationInPercent]\"collector=\"index_fragmentation_checks\", query=\"index_fragmentation\""
ts=2022-10-20T11:44:14.923Z caller=klog.go:55 level=debug func=Verbose.Infof msg="[collector=\"index_fragmentation_checks\"] Returning cached metrics: min_interval=180.000s cache_age=52.871s"
ts=2022-10-20T11:44:14.923Z caller=klog.go:55 level=debug func=Verbose.Infof msg="[collector=\"cleanup_jobs\"] Returning cached metrics: min_interval=86400.000s cache_age=3211.993s"
ts=2022-10-20T11:45:17.027Z caller=klog.go:55 level=debug func=Verbose.Infof msg="[collector=\"index_fragmentation_checks\"] Returning cached metrics: min_interval=180.000s cache_age=114.985s"
ts=2022-10-20T11:45:17.027Z caller=klog.go:55 level=debug func=Verbose.Infof msg="[collector=\"cleanup_jobs\"] Returning cached metrics: min_interval=86400.000s cache_age=3274.106s"```
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@jakob-reesalu thanks, let's try to catch up tomorrow, I have some thoughts. 👍
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@burningalchemist Yo! So I tried usql as we talked about. It gave this error:
"Must declare the scalar variable "@currentDb"."
Problem is, the variable is declared in the query above. Googling on it, some ppl suggested this can happen when mixing dynamic and static SQL so eventually I put the whole query within the @Sql variable and then EXECUTE(@Sql) on that. Didn't get any error message but nor any result. Tried it in SQL Exporter and no change from before.
While testing various things on the way I would get a result "IF 21" but have no idea what that was about, and the usql github didn't have any threads on that.
An interesting note is that the other queries I have that do work in SQL Exporter would also yield the error of "@CurrentDB" not being declared.
Anywho, due to time I think I'll have to give up on this with variables and the while loop and maybe just make a bunch of static queries.
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@burningalchemist FYI: the issue might be with doing INNER JOIN with other tables. Because I use a while loop and declare variables in other queries that work, but I don't do joins there. So maybe that's the issue, in case you encounter some similar issue in the future!
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Hey Jakob! Thanks for the follow up and the detailed investigation. 👍
Let me think what I can do to get access to some MSSQL server to check your hypothesis.
If I get any results or explanation I'll mention you in this issue.
What's your MSSQL version by the way?
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@jakob-reesalu Thanks for sharing the query, I'll use it on my end to investigate. 👍
So if you run it several times it returns nothing? Any logs on the SQL Exporter side or MSSQL side?
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@burningalchemist You're welcome ;)
So, me and a colleague looked at the issue and we changed some things, like declaring each variable in a separate DECLARE statement and changing temporary tables to variables instead.
The query now looks like this:
-- Put relevant database names in temp table
DECLARE @tempDbList AS TABLE (Id INT IDENTITY(1,1), [Name] SYSNAME)
INSERT INTO @tempDbList ([Name])
SELECT [Name]
FROM master.sys.databases WHERE
(Name NOT IN ('master','model','msdb','tempdb') AND
Name NOT LIKE '%<name>%' AND
Name NOT LIKE '%<name>%' AND
Name NOT LIKE '%<name>%' AND
Name NOT LIKE '%<name>%');
DECLARE @tempFragmentations AS TABLE ([Database] sysname, [Table] NVARCHAR(200), [Index] NVARCHAR(500), AvgFragmentationInPercent FLOAT)
DECLARE @currentId INT
DECLARE @currentDb sysname
DECLARE @dbCount INT
-- Iterate through each database and all indexes in <table>, <table> and <table> tables.
SELECT @currentId = 1, @dbCount = 9
FROM @tempDbList;
WHILE @currentId <= @dbCount
BEGIN
SELECT @currentDb = Name
FROM @tempDbList
WHERE Id = @currentId;
-- Get results, indexes with >5% fragmentation, for each db
INSERT INTO @tempFragmentations
SELECT
DB_NAME(DDIPS.database_id),
T.name,
I.name,
DDIPS.avg_fragmentation_in_percent
FROM
sys.dm_db_index_physical_stats (DB_ID(@currentDb), NULL, NULL, NULL, NULL) AS DDIPS
JOIN sys.tables T ON T.object_id = DDIPS.object_id
JOIN sys.indexes I ON I.object_id = DDIPS.object_id
AND DDIPS.index_id = I.index_id
WHERE
DDIPS.database_id = DB_ID(@currentDb)
AND DDIPS.avg_fragmentation_in_percent > 5
AND (T.name = '<table>' OR
T.name = '<table>' OR
T.name = '<table>')
AND I.name IS NOT NULL;
SET @currentId = @currentId + 1;
END
SELECT * FROM @tempFragmentations;
This gives the following result in usql now:
DECLARE 1
error: sqlserver: 1087: Must declare the table variable "@tempDbList".
error: sqlserver: 137: Must declare the scalar variable "@currentDb".
error: sqlserver: 137: Must declare the scalar variable "@currentDb".
error: sqlserver: 137: Must declare the scalar variable "@currentId".
error: sqlserver: 1087: Must declare the table variable "@tempFragmentations".
error: sqlserver: 1087: Must declare the table variable "@tempFragmentations".
error: test1.txt: sqlserver: 1087: Must declare the table variable "@tempFragmentations".
So.... something with variable declarations it seems, but I don't get what really. I had a look at the driver for MSSQL https://github.com/microsoft/go-mssqldb but no clues there really.
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@jakob-reesalu I think the problem that you're using multiple statement query, which isn't supported. DECLARE
is a statement itself. The other question is if it works for some other queries (it should not).
I'm still trying to get an access to MSSQL 2014 somewhere to try things out myself. :)
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@burningalchemist Hm... here's another query and it actually works. It checks databases for whether a cleanup has been performed and there are multiple statements:
-- Delete temp table if it exists
IF OBJECT_ID('tempdb.dbo.#tempCleanupPerformed') IS NOT NULL
DROP TABLE #tempCleanupPerformed
-- Get all database names and create temp table
SELECT IDENTITY(INT,1,1) AS Id, Name INTO #tempCleanupPerformed
FROM master.sys.Databases WHERE
(Name LIKE '%<something>%' AND Name LIKE '%<something>%' AND Name NOT LIKE '%log%' AND Name NOT LIKE '%archive%')
ALTER TABLE #tempCleanupPerformed
ADD SomeDateTimeColumn DATETIME2
-- Iterate through all databases for <table> with a time greater than 3 months
DECLARE @currentId INT, @currentDb sysname, @dbCount INT, @sql NVARCHAR(max);
SELECT @currentId = 1, @dbCount = MAX(Id)
FROM #tempCleanupPerformed
WHILE @currentId <= @dbCount
BEGIN
SELECT @currentDb = Name
FROM #tempCleanupPerformed
WHERE Id = @currentId
SET @sql =
'DECLARE @currentTime DATETIME2
SELECT TOP (1) @currentTime = Time
FROM '+@currentDb+'.[dbo].[<table>]
UPDATE #tempCleanupPerformed
SET SomeDateTimeColumn =
CASE WHEN DATEDIFF(MONTH, @currentTime, GETUTCDATE()) > 3
THEN @currentTime
ELSE NULL
END
WHERE Id = '+CAST(@currentId as varchar(3))
EXEC (@sql);
SET @currentId = @currentId + 1;
END
-- Return 1 or 0 for each database to indicate whether cleanup has run or not
SELECT Name AS 'Database', (CASE WHEN SomeDateTimeColumn IS NULL THEN 1 ELSE 0 END) AS CleanupPerformed FROM #tempCleanupPerformed
-- Cleanup
DROP TABLE #tempCleanupPerformed
Even if it works uSQL gives these errors:
IF 1
error: sqlserver: 137: Must declare the scalar variable "@sql".
error: sqlserver: 137: Must declare the scalar variable "@currentId".
error: sqlserver: 156: Incorrect syntax near the keyword 'SELECT'.
error: test1.txt: sqlserver: 156: Incorrect syntax near the keyword 'SELECT'.
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@burningalchemist We finally nailed it, in quite an ugly way, but at least it's working!
Some lessons: uSQL is a liar, queries that work in sql-exporter may render errors in uSQL. And to get the final query working in uSQL we had to put it in a stored procedure and execute that, but that's not necessary in sql-exporter where we can put the query directly in the collector's config.
This is how it turned out in the end, I think maybe the big thing is that we put the USE ['+@currentDb+']
to get the context right, this was probably the issue with joining from before:
-- Declare variables
DECLARE @tempDbList AS TABLE (Id INT IDENTITY(1,1), [Name] SYSNAME)
INSERT INTO @tempDbList ([Name])
SELECT [Name]
FROM master.sys.databases WHERE
(Name NOT IN ('master','model','msdb','tempdb') AND
Name NOT LIKE '%log%' AND
Name NOT LIKE '%archive%' AND
Name NOT LIKE '%<something>%' AND
Name NOT LIKE '%<something>%'
Name NOT LIKE '%<something>%')
DECLARE @tempFragmentations AS TABLE ([database] SYSNAME, [table] NVARCHAR(200), [index] NVARCHAR(500), avgFragmentationInPercent FLOAT)
DECLARE @currentId INT;
DECLARE @currentDb SYSNAME
DECLARE @dbCount INT
-- Iterate through each database and all indexes in <table>, <table> and <table> tables.
SELECT @currentId = 1, @dbCount = MAX(Id)
FROM @tempDbList;
DECLARE @sql NVARCHAR(max);
WHILE @currentId <= @dbCount
BEGIN
SELECT @currentDb = Name
FROM @tempDbList
WHERE Id = @currentId;
-- Get results, indexes with >5% fragmentation, for each db
SET @sql = '
USE ['+@currentDb+']
SELECT
DB_NAME(DDIPS.database_id),
T.name,
I.name,
ROUND(DDIPS.avg_fragmentation_in_percent, 2)
FROM
sys.dm_db_index_physical_stats (DB_ID('''+@currentDb+'''), NULL, NULL, NULL, NULL) AS DDIPS
JOIN sys.tables T ON T.object_id = DDIPS.object_id
JOIN sys.indexes I ON I.object_id = DDIPS.object_id
AND DDIPS.index_id = I.index_id
WHERE
DDIPS.database_id = DB_ID('''+@currentDb+''')
AND DDIPS.avg_fragmentation_in_percent > 5
AND (T.name = ''<table>'' OR
T.name = ''<table>'' OR
T.name = ''<table>'')
AND I.name IS NOT NULL;'
INSERT INTO @tempFragmentations EXEC sp_executesql @sql
SET @currentId = @currentId + 1;
END
SELECT * FROM @tempFragmentations;
But there is still some spooky "context deadline exceeded" errors. Sometimes the above query runs to completion and provides the metrics, and I can see that it's a query currently running on the db instance. Other times I see the query starting to run but immediately stops due to context deadline exceeded.
Sql-exporter config:
global:
scrape_timeout: 1h
scrape_timeout_offset: 500ms
min_interval: 0s
max_connections: 3
max_idle_connections: 3
max_connection_lifetime: 5m
Prometheus config:
global:
scrape_interval: 60s # Default is 1m.
evaluation_interval: 1m # Evaluate rules every 1 minute. Default is 1m.
scrape_timeout: 15s
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Related Issues (20)
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- Scrape each job separately HOT 2
- [helm] Support getting data-source-name from an existing secret HOT 12
- Ignore no rows returned HOT 6
- Better handling of NULL return values in certain cases HOT 6
- Environment variable substitution for DSN's HOT 3
- Cache Mechanism for sql exporter HOT 2
- clickhouse `context deadline exceeded` HOT 1
- Helm chart improvement: additionalContainers HOT 5
- Can it support the collection of cloud databases HOT 1
- unable to use -web.listen.address flag HOT 4
- SIGHUP config reload HOT 4
- Clickhouse requests dosn't work after upgrade clickhouse driver to v2 HOT 6
- Scrape errors not clearing without restart HOT 3
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from sql_exporter.