# Mysql slow log

**URL:** <https://discuss.elastic.co/t/mysql-slow-log/343917>\
**Category:** Logstash\
**Created:** [September 26, 2023, 5:34pm UTC](https://discuss.elastic.co/t/mysql-slow-log/343917 "2023-09-26T17:34:16Z")\
**Posts on this page:** 3\
**Page:** 1

<div class="post-metadata">

**Author:** ![danmed](https://avatars.discourse-cdn.com/v4/letter/d/aeb1de/32.png) [@danmed](https://discuss.elastic.co/u/danmed)\
**Post date:** [September 26, 2023, 5:34pm UTC](https://discuss.elastic.co/t/mysql-slow-log/343917/1 "2023-09-26T17:34:16Z")

</div>

Hi all, I am not able to successfully parse **Mysql's slow log** using logstash.

The log file:

```auto
# Time: 2018-02-27T09:20:14.122543Z
# User@Host: user[user] @ [nnn.nnn.nnn.nn] Id: 148
# Query_time: 10.275441 Lock_time: 0.000000 Rows_sent: 0 Rows_examined: 0
use somedb;
SET timestamp=1519723214;
INSERT into sometable values ............< **an extreeeemely long line** >.....
...
...etc
# Time: 2023-09-26T10:35:06.833127Z
# User@Host: user[user] @ [nnn.nnn.nnn.nn] Id: 5724051
# Query_time: 3.335550 Lock_time: 0.000094 Rows_sent: 1 Rows_examined: 2792117
SET timestamp=1695724506;
SELECT FIELD_ID,ID,ISSUE_ID,LOCK_HASH,LOCK_TIME,`RANK`,TYPE FROM SomeTable WHERE FIELD_ID = 12345 AND BUCKET = 1 ORDER BY `RANK` DESC LIMIT 1;
# Time: 2023-09-26T10:35:49.178675Z
# User@Host: user[user] @ [nnn.nnn.nnn.nn] Id: 5724042
# Query_time: 3.780189 Lock_time: 0.000060 Rows_sent: 1 Rows_examined: 4116845
SET timestamp=1695724549;
SELECT COUNT(*) FROM SomeTable WHERE FIELD_ID = 12345 AND BUCKET = 2;

```

I've tried

```auto
input {
  file {
    path => "/path/to/the/slow.log"
    start_position => "beginning"
    codec => multiline {
      pattern => "^# Time:"
      negate => true
      what => "previous"
    }
  }
}
filter {

mutate { #this might not be needed
        gsub => ['message', "\n", " "]
    }

  grok {
    match => { "message" => "^# Time:\s+%{TIMESTAMP_ISO8601:timestamp}\s+%{GREEDYDATA:message}" }
  }
}
output {
        file {
                path => "/path/to/outputfile"
        }
}

```

But the output file just doesn't get created !  
I can read the input file and I just need the filter to work in the simplest way possible so as to send these lines **as is** , to an index....  
Extra field splitting is not really needed.

Can someone please help me create these output lines?  
Thanks so very much.

---

<div class="post-metadata">

**Author:** ![danmed](https://avatars.discourse-cdn.com/v4/letter/d/aeb1de/32.png) [@danmed](https://discuss.elastic.co/u/danmed)\
**Post date:** [September 26, 2023, 8:28pm UTC](https://discuss.elastic.co/t/mysql-slow-log/343917/2 "2023-09-26T20:28:54Z")

</div>

I even tried this after looking at another forum member's question/answer:  
Here I look for Time to start the pattern,

```auto
input {
  file {
    path => "/path/to/the/log"
    start_position => "beginning"
    codec => multiline {
      pattern => "^# Time:"
      negate => true
      what => "previous"
      auto_flush_interval => 2
    }
  }
}

mutate {
        gsub => ['message', "\n", " "]
}

  grok {
        match => ["message" , "%{GREEDYDATA}Time:%{SPACE}%{TIMESTAMP_ISO8601:mysql_slow_querydate} %{GREEDYDATA}User@Host: (?:%{USERNAME:mysql_slow_clientuser})\[(?:%{DATA:mysql_cluster})\] @ %{SPACE}\[(?:%{DATA:mysql_slow_clientip})\]%{SPACE}Id:%{SPACE}%{NUMBER:mysql_slow_id} %{GREEDYDATA}Query_time: %{NUMBER:mysql_slow_querytime:float}(?:%{SPACE})Lock_time: %{NUMBER:mysql_slow_locktime:float}(?:%{SPACE})Rows_sent: %{NUMBER:mysql_slow_rowssent:int}(?:%{SPACE})Rows_examined: %{NUMBER:mysql_slow_rowsexamined:int}%{GREEDYDATA:mysql_slow_query};" ]
}

```

because sometimes the line below is missing

use somedb;

So, after Rows Examined I grab all the rest into GREEDYDATA.

However the grok is still not working as there is no output file created.

---

<div class="post-metadata">

**Author:** ![system](https://us1.discourse-cdn.com/elastic/original/3X/1/a/1ac57faf039f6b580b3f104ef42a2a89e41014de.png) [@system](https://discuss.elastic.co/u/system)\
**Post date:** [October 24, 2023, 8:29pm UTC](https://discuss.elastic.co/t/mysql-slow-log/343917/3 "2023-10-24T20:29:07Z")

</div>

This topic was automatically closed 28 days after the last reply. New replies are no longer allowed.