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Paul J Stevens schrieb:
> Uwe Kiewel wrote:
>>>> But, mysqld does not report any problems...
>>> Could be a network error, or resource depletion. The first would not be
>>> detected by the mysql server, the second would generate a message in the
>>> mysql error log.
>> I think I can close out the network, because it is a local host
>> connection. So, MySQL and dbmail runs on the same host.
> 
> That's too easy. There is a problem. And it's in your mysql setup.
> Something is causing those mysql connection errors.
> 
> Also, the hostname in your logs suggests you are running on a vmware
> image. That is /relevant/ information. Especially if dbmail is not in
> the same image as mysql.


No. At the host, there was running vmware in the past. Now, it is a
physical machine running mysql and dbmail. Only, I didn't change the
hostname.

Additionally, I do replication for having a 2nd database.


> 
>>>> Apr 12 17:36:02 vm-host dbmail/imap4d[15580]: Error:[serverchild]
>>>> serverchild.c,PerformChildTask(+298): could not connect to database
>>> Again, same thing: network problem or max_connections depleted.
>>
>> I checked it:
>>
>> mysql> show variables like '%connect%';
>> +--------------------------+-------------------+
>> | Variable_name            | Value             |
>> +--------------------------+-------------------+
>> | character_set_connection | latin1            |
>> | collation_connection     | latin1_swedish_ci |
>> | connect_timeout          | 5                 |
>> | init_connect             |                   |
>> | max_connect_errors       | 10                |
>> | max_connections          | 100               |
>> | max_user_connections     | 0                 |
>> +--------------------------+-------------------+
> 
> all very standard. But combining errno 104 with
> http://dev.mysql.com/doc/refman/5.0/en/error-lost-connection.html
> 
> leads connect_timeout as a possible cullprit. Increase that value to
> something significantly larger, like 60.

Ok, I changed it.

> 
> 
>> But, how can I check the current connection count?
> 
> mysqladmin processlist
> 

oh, there is a lot of...:

+-------+-----------+----------------------+--------+-------------+-------+----------------------------------------------------------------+------------------+
| Id    | User      | Host                 | db     | Command     | Time
 | State                                                          | Info
            |
+-------+-----------+----------------------+--------+-------------+-------+----------------------------------------------------------------+------------------+
|     2 | dbmail    | localhost            | dbmail | Sleep       |
0 |                                                                |
NULL             |
|     5 | dbmail    | localhost            | dbmail | Sleep       |
1 |                                                                |
NULL             |
|     6 | dbmail    | localhost            | dbmail | Sleep       |
157 |                                                                |
NULL             |
|     7 | dbmail    | localhost            | dbmail | Sleep       |
16 |                                                                |
NULL             |
|     8 | dbmail    | localhost            | dbmail | Sleep       |
1 |                                                                |
NULL             |
|    11 | dbmail    | localhost            | dbmail | Sleep       |
0 |                                                                |
NULL             |
|  8399 | mysqlrepl | xx.xx.xx.xx:46910 | NULL   | Binlog Dump | 51320 |
Has sent all binlog to slave; waiting for binlog to be updated | NULL
          |
|  8606 | cactiuser | localhost:54293      | cacti  | Sleep       |
1362 |                                                                |
NULL             |
|  8607 | cactiuser | localhost:54294      | cacti  | Sleep       |
1268 |                                                                |
NULL             |
|  8608 | cactiuser | localhost:54295      | cacti  | Sleep       |
1281 |                                                                |
NULL             |
|  8609 | cactiuser | localhost:54296      | cacti  | Sleep       |
2810 |                                                                |
NULL             |
|  8610 | cactiuser | localhost:54297      | cacti  | Sleep       |
1267 |                                                                |
NULL             |
|  8611 | cactiuser | localhost:54298      | cacti  | Sleep       |
2761 |                                                                |
NULL             |
|  8612 | cactiuser | localhost:54299      | cacti  | Sleep       |
1287 |                                                                |
NULL             |
|  8613 | cactiuser | localhost:54300      | cacti  | Sleep       |
1289 |                                                                |
NULL             |
|  8614 | cactiuser | localhost:54301      | cacti  | Sleep       |
1279 |                                                                |
NULL             |
|  8615 | cactiuser | localhost:54302      | cacti  | Sleep       |
6929 |                                                                |
NULL             |
|  8618 | cactiuser | localhost:54305      | cacti  | Sleep       |
1302 |                                                                |
NULL             |
|  8619 | cactiuser | localhost:54306      | cacti  | Sleep       |
2747 |                                                                |
NULL             |
|  8620 | cactiuser | localhost:54307      | cacti  | Sleep       |
1264 |                                                                |
NULL             |
|  8622 | cactiuser | localhost:54309      | cacti  | Sleep       |
1286 |                                                                |
NULL             |
|  8623 | cactiuser | localhost:54310      | cacti  | Sleep       |
1264 |                                                                |
NULL             |
|  8624 | cactiuser | localhost:54311      | cacti  | Sleep       |
2761 |                                                                |
NULL             |
|  8657 | dbmail    | localhost            | dbmail | Sleep       |
10 |                                                                |
NULL             |
|  8658 | dbmail    | localhost            | dbmail | Sleep       |
214 |                                                                |
NULL             |
|  8682 | dbmail    | localhost:34399      | dbmail | Sleep       |
2583 |                                                                |
NULL             |
|  8683 | dbmail    | localhost:34400      | dbmail | Sleep       |
14953 |                                                                |
NULL             |
|  8684 | dbmail    | localhost:34401      | dbmail | Sleep       |
14538 |                                                                |
NULL             |
|  8815 | dbmail    | localhost            | dbmail | Sleep       |
9 |                                                                |
NULL             |
|  8816 | dbmail    | localhost            | dbmail | Sleep       |
216 |                                                                |
NULL             |
| 10954 | dbmail    | localhost:54313      | dbmail | Sleep       |
2586 |                                                                |
NULL             |
| 10957 | dbmail    | localhost:54316      | dbmail | Sleep       |
14554 |                                                                |
NULL             |
| 10980 | dbmail    | localhost:46872      | dbmail | Sleep       |
2605 |                                                                |
NULL             |
| 13229 | dbmail    | localhost            | dbmail | Sleep       |
6055 |                                                                |
NULL             |
| 13353 | dbmail    | localhost:41298      | dbmail | Sleep       |
14956 |                                                                |
NULL             |
| 13354 | dbmail    | localhost:41299      | dbmail | Sleep       |
6811 |                                                                |
NULL             |
| 13355 | dbmail    | localhost:41300      | dbmail | Sleep       |
6826 |                                                                |
NULL             |
| 13634 | cactiuser | localhost:34659      | cacti  | Sleep       |
1264 |                                                                |
NULL             |
| 14857 | cactiuser | localhost:36485      | cacti  | Sleep       |
1279 |                                                                |
NULL             |
| 14858 | cactiuser | localhost:36486      | cacti  | Sleep       |
2751 |                                                                |
NULL             |
| 14881 | cactiuser | localhost:36513      | cacti  | Sleep       |
1301 |                                                                |
NULL             |
| 14882 | root      | localhost            | dbmail | Sleep       |
6833 |                                                                |
NULL             |
| 14883 | dbmail    | localhost:59155      | dbmail | Sleep       |
6832 |                                                                |
NULL             |
| 14884 | dbmail    | localhost:59156      | dbmail | Sleep       |
6829 |                                                                |
NULL             |
| 15845 | root      | localhost            | dbmail | Sleep       |
2605 |                                                                |
NULL             |
| 16112 | dbmail    | localhost:49800      | dbmail | Sleep       |
130 |                                                                |
NULL             |
| 16305 | dbmail    | localhost:43881      | dbmail | Sleep       |
16 |                                                                |
NULL             |
| 16366 | dbmail    | localhost            | dbmail | Sleep       |
6 |                                                                |
NULL             |
| 16367 | dbmail    | localhost            | dbmail | Sleep       |
211 |                                                                |
NULL             |
| 16368 | dbmail    | localhost            | dbmail | Sleep       |
8 |                                                                |
NULL             |
| 16369 | dbmail    | localhost            | dbmail | Sleep       |
214 |                                                                |
NULL             |
| 16370 | dbmail    | localhost            | dbmail | Sleep       |
214 |                                                                |
NULL             |
| 16371 | dbmail    | localhost            | dbmail | Sleep       |
216 |                                                                |
NULL             |
| 16372 | dbmail    | localhost            | dbmail | Sleep       |
211 |                                                                |
NULL             |
| 16373 | dbmail    | localhost            | dbmail | Sleep       |
214 |                                                                |
NULL             |
| 16374 | dbmail    | localhost            | dbmail | Sleep       |
0 |                                                                |
NULL             |
| 16375 | dbmail    | localhost            | dbmail | Sleep       |
213 |                                                                |
NULL             |
| 16419 | dbmail    | localhost            | dbmail | Sleep       |
18 |                                                                |
NULL             |
| 16420 | dbmail    | localhost            | dbmail | Sleep       |
18 |                                                                |
NULL             |
| 16421 | dbmail    | localhost            | dbmail | Sleep       |
18 |                                                                |
NULL             |
| 16428 | root      | localhost            | NULL   | Query       |
0 | NULL                                                           |
show processlist |
+-------+-----------+----------------------+--------+-------------+-------+----------------------------------------------------------------+------------------+
61 rows in set (0.00 sec)




Thanks,
        Uwe
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