Re: InnoDB corrupt after power failure
2012/10/4 Andrew Miklas and...@pagerduty.com Hi guys, I recently had a data corruption issue with InnoDB. MySQL was shut down improperly (power failure), and when the system came back up, MySQL refused to start. On inspection of the logs (see below), it looks like the tablespace became seriously corrupted. In the end, I had to rebuild the slave using mysqldump. I'm curious what happened here, since I thought InnoDB wasn't supposed to become corrupted on an improper shutdown. One possibility that we were exploring was that the filesystem journal setting was incorrect. We were using ext3 with the journal set to writeback mode. Is this a known bad config with InnoDB? Hey Andrew, it shouldn't be a biggie if you have a BBU. Do you guys use HW RAID + BBU? What's your innodb_flush_log_at_trx_commit value? Have you tried playing with innodb_force_recovery option to try to get the server started at least? That way you might be able to identify which table(s) is/are the corrupted one and the one(s) preventing the whole server from booting up. Manuel
(real) silly question about variables...
Hi I know there'd be a reason, but I can't understand that.. mysql select @valore:=rand(), @valore, @valore:=ciao, @valore; +---+---+-+-+ | @valore:=rand() | @valore | @valore:=ciao | @valore | +---+---+-+-+ | 0.483624490428366 | 0.483624490428366 | ciao| 0 | +---+---+-+-+ 1 row in set (0.00 sec) mysql select @valore:=rand(), @valore, @valore:=ciao, @valore; +---+---+-+-+ | @valore:=rand() | @valore | @valore:=ciao | @valore | +---+---+-+-+ | 0.747058809499311 | 0.747058809499311 | ciao| ciao| +---+---+-+-+ 1 row in set (0.00 sec) why in the first execution the latest value is 0 and not 'ciao'? and why in the first 2 columns the variables seems works as expected!? thank you in advance bye MAS! -- MySQL General Mailing List For list archives: http://lists.mysql.com/mysql To unsubscribe:http://lists.mysql.com/mysql
Re: (real) silly question about variables...
Hrm, what version of MySQL? I just ran the query on 5.5.24 and it worked as expected. - Derek Downey On Oct 4, 2012, at 9:52 AM, MAS! wrote: Hi I know there'd be a reason, but I can't understand that.. mysql select @valore:=rand(), @valore, @valore:=ciao, @valore; +---+---+-+-+ | @valore:=rand() | @valore | @valore:=ciao | @valore | +---+---+-+-+ | 0.483624490428366 | 0.483624490428366 | ciao| 0 | +---+---+-+-+ 1 row in set (0.00 sec) mysql select @valore:=rand(), @valore, @valore:=ciao, @valore; +---+---+-+-+ | @valore:=rand() | @valore | @valore:=ciao | @valore | +---+---+-+-+ | 0.747058809499311 | 0.747058809499311 | ciao| ciao| +---+---+-+-+ 1 row in set (0.00 sec) why in the first execution the latest value is 0 and not 'ciao'? and why in the first 2 columns the variables seems works as expected!? thank you in advance bye MAS! -- MySQL General Mailing List For list archives: http://lists.mysql.com/mysql To unsubscribe:http://lists.mysql.com/mysql -- MySQL General Mailing List For list archives: http://lists.mysql.com/mysql To unsubscribe:http://lists.mysql.com/mysql
Re: (real) silly question about variables...
On 04/10/2012 15:52, MAS! wrote: Hi I know there'd be a reason, but I can't understand that.. mysql select @valore:=rand(), @valore, @valore:=ciao, @valore; +---+---+-+-+ | @valore:=rand() | @valore | @valore:=ciao | @valore | +---+---+-+-+ | 0.483624490428366 | 0.483624490428366 | ciao| 0 | +---+---+-+-+ 1 row in set (0.00 sec) mysql select @valore:=rand(), @valore, @valore:=ciao, @valore; +---+---+-+-+ | @valore:=rand() | @valore | @valore:=ciao | @valore | +---+---+-+-+ | 0.747058809499311 | 0.747058809499311 | ciao| ciao| +---+---+-+-+ 1 row in set (0.00 sec) why in the first execution the latest value is 0 and not 'ciao'? and why in the first 2 columns the variables seems works as expected!? what version of MySQL are you running? I get this:- Server version: 5.5.17-log MySQL Community Server (GPL) mysql select @valore:=rand(), @valore, @valore:=ciao, @valore; +++-+-+ | @valore:=rand()| @valore| @valore:=ciao | @valore | +++-+-+ | 0.8187706152151997 | 0.8187706152151997 | ciao| ciao| +++-+-+ Rich -- MySQL General Mailing List For list archives: http://lists.mysql.com/mysql To unsubscribe:http://lists.mysql.com/mysql
RE: (real) silly question about variables...
in a mySQL statement the values are displayed BEFORE assignments are made Ciao, No MAS __ Per favore non alterare o perturbare la comunicazione From: urk...@gmail.com Subject: (real) silly question about variables... Date: Thu, 4 Oct 2012 15:52:20 +0200 To: mysql@lists.mysql.com Hi I know there'd be a reason, but I can't understand that.. mysql select @valore:=rand(), @valore, @valore:=ciao, @valore; +---+---+-+-+ | @valore:=rand() | @valore | @valore:=ciao | @valore | +---+---+-+-+ | 0.483624490428366 | 0.483624490428366 | ciao| 0 | +---+---+-+-+ 1 row in set (0.00 sec) mysql select @valore:=rand(), @valore, @valore:=ciao, @valore; +---+---+-+-+ | @valore:=rand() | @valore | @valore:=ciao | @valore | +---+---+-+-+ | 0.747058809499311 | 0.747058809499311 | ciao| ciao| +---+---+-+-+ 1 row in set (0.00 sec) why in the first execution the latest value is 0 and not 'ciao'? and why in the first 2 columns the variables seems works as expected!? thank you in advance bye MAS! -- MySQL General Mailing List For list archives: http://lists.mysql.com/mysql To unsubscribe:http://lists.mysql.com/mysql
Re: (real) silly question about variables...
what version of MySQL are you running? I get this:- mysql select version(); +---+ | version() | +---+ | 5.1.63-0+squeeze1 | +---+ I'm asking that because I have a trouble with a select.. I have something similar.. SELECT @sec:=IF(GROUP_CONCAT(DISTINCT secA.sec_code SEPARATOR '|') is null, IF(GROUP_CONCAT(DISTINCT secB.sec_code SEPARATOR '|') is null, settore, GROUP_CONCAT(DISTINCT secB.sec_code SEPARATOR '|')), GROUP_CONCAT(DISTINCT secA.sec_code SEPARATOR '|') ) as settore, SELECT CASE( WHEN SUBSTR(@sec,1,23)=... THEN ... WHEN SUBSTR(@sec,1,12)=... THEN ... WHEN SUBSTR(@sec,1,34)=... THEN ... ) FROM (several left joins) and it seems the sec variable is always the 'previous one' and not the result from the nested 'if' :( -- MySQL General Mailing List For list archives: http://lists.mysql.com/mysql To unsubscribe:http://lists.mysql.com/mysql
user last activity and log in
Hello, I want to find the last time the given list of users logged in. Is there any mysql table from where i can retrieve the data or anyt specific sql Aastha Gupta
Re: user last activity and log in
There is no such thing. Your application has to deal with such info. LS On Oct 4, 2012, at 11:28 AM, Aastha wrote: Hello, I want to find the last time the given list of users logged in. Is there any mysql table from where i can retrieve the data or anyt specific sql Aastha Gupta -- MySQL General Mailing List For list archives: http://lists.mysql.com/mysql To unsubscribe:http://lists.mysql.com/mysql
Re: user last activity and log in
Am 04.10.2012 17:28, schrieb Aastha: I want to find the last time the given list of users logged in. Is there any mysql table from where i can retrieve the data or any specific sql no - because this would mean a WRITE QUERY in the mysql-database for every connection - having a web-application with hundrets of calls per second would kill the performance this makes pretty no sense and is NOT the job of a RDBMS implement it in your application / db-abstraction-layer signature.asc Description: OpenPGP digital signature
Re: user last activity and log in
It is possible in MySQL 5.6 S On Thu, Oct 4, 2012 at 11:30 AM, List Man list@bluejeantime.com wrote: There is no such thing. Your application has to deal with such info. LS On Oct 4, 2012, at 11:28 AM, Aastha wrote: Hello, I want to find the last time the given list of users logged in. Is there any mysql table from where i can retrieve the data or anyt specific sql Aastha Gupta -- MySQL General Mailing List For list archives: http://lists.mysql.com/mysql To unsubscribe:http://lists.mysql.com/mysql
Re: user last activity and log in
- Original Message - From: Reindl Harald h.rei...@thelounge.net this makes pretty no sense and is NOT the job of a RDBMS implement it in your application / db-abstraction-layer I notice no specification of what kind of users, so I'm assuming DB users. There *is* such a thing: you can find it in the general query log. Turning that on is a considerable performance overhead, though, and so is firmly discouraged on production systems. -- Linux Bier Wanderung 2012, now also available in Belgium! August, 12 to 19, Diksmuide, Belgium - http://lbw2012.tuxera.be -- MySQL General Mailing List For list archives: http://lists.mysql.com/mysql To unsubscribe:http://lists.mysql.com/mysql
Re: user last activity and log in
Yes, i meant DB users. On Thu, Oct 4, 2012 at 10:57 AM, Johan De Meersman vegiv...@tuxera.bewrote: - Original Message - From: Reindl Harald h.rei...@thelounge.net this makes pretty no sense and is NOT the job of a RDBMS implement it in your application / db-abstraction-layer I notice no specification of what kind of users, so I'm assuming DB users. There *is* such a thing: you can find it in the general query log. Turning that on is a considerable performance overhead, though, and so is firmly discouraged on production systems. -- Linux Bier Wanderung 2012, now also available in Belgium! August, 12 to 19, Diksmuide, Belgium - http://lbw2012.tuxera.be -- MySQL General Mailing List For list archives: http://lists.mysql.com/mysql To unsubscribe:http://lists.mysql.com/mysql
Re: user last activity and log in
it does not matter what kind of users usually each application has it's own datanase and it's own user, the application makes the connection and can at this point log whatever you want using the general query log can only be a bad joke you will log EVERY query and not only logins again: it is not the job of a RDBMS to waste I/O and performance with such things - the application as example could refresh it only once per user-session the RDBMS would write blindly for each connection Am 04.10.2012 18:18, schrieb Aastha: Yes, i meant DB users. On Thu, Oct 4, 2012 at 10:57 AM, Johan De Meersman vegiv...@tuxera.be mailto:vegiv...@tuxera.be wrote: - Original Message - From: Reindl Harald h.rei...@thelounge.net mailto:h.rei...@thelounge.net this makes pretty no sense and is NOT the job of a RDBMS implement it in your application / db-abstraction-layer I notice no specification of what kind of users, so I'm assuming DB users. There *is* such a thing: you can find it in the general query log. Turning that on is a considerable performance overhead, though, and so is firmly discouraged on production systems. signature.asc Description: OpenPGP digital signature
Re: user last activity and log in
- Original Message - From: Reindl Harald rei...@thelounge.net it does not matter what kind of users I'm happy for you that you still have all the answers anyone could ever want, Harald. Regardless of having any background knowledge on the circumstance of the question, even. You truly are a gifted individual. using the general query log can only be a bad joke you will log EVERY query and not only log-ins Yes, which is why I specified explicitly that it is very much discouraged for production use. However, it can be useful at times. I recently turned it on to investigate sudden, unpredictable and above all annoyingly brief peaks in the number of connections, and I needed to know what APPLICATION INSTANCE was responsible, not which particular user - as well as have a good view of what the offending sessions did. A tcpdump would have been an option, but given that wireshark still isn't too good at decoding MySQL traffic I still opted for the full query log. There was some more tomfoolery involved, but after almost a week of logging we successfully identified the culprit. Now you may do things differently, and you may also reach a satisfactory solution; but I am absolutely sick and tired of hearing how your way is the only valid way, casually implying that the rest of the world are all bloody idiots that should just shut up and listen while you tell them every ridiculous way in which they are wrong and inferior. PLEASE, for your own sake - not to mention the nerves of the people around you - learn to accept that there are a lot of different ways to do things, and that sometimes people pick their optimal solution on quite different criteria than the ones you use. That does not necessarily make them wrong, merely different from you. As the Perl mantra goes, There's More Than One Way To Do It. /Johan -- Linux Bier Wanderung 2012, now also available in Belgium! August, 12 to 19, Diksmuide, Belgium - http://lbw2012.tuxera.be -- MySQL General Mailing List For list archives: http://lists.mysql.com/mysql To unsubscribe:http://lists.mysql.com/mysql
Re: InnoDB corrupt after power failure
Hi Manuel, Thanks for the fast reply. On Oct 4, 2012, at 12:05 AM, Manuel Arostegui wrote: snip it shouldn't be a biggie if you have a BBU. Do you guys use HW RAID + BBU? We've checked with our hosting provider, and the database was indeed stored on a BBU RAID. What's your innodb_flush_log_at_trx_commit value? mysql show variables like 'innodb_flush_log_at_trx_commit'\G *** 1. row *** Variable_name: innodb_flush_log_at_trx_commit Value: 1 1 row in set (0.00 sec) Have you tried playing with innodb_force_recovery option to try to get the server started at least? That way you might be able to identify which table(s) is/are the corrupted one and the one(s) preventing the whole server from booting up. As the affected machine was just a read only slave, it was easier for me to get things back into service by just reloading off the master. Unfortunately, I didn't think to keep the corrupted ibd files for later debugging. At this point, I'm more trying to figure out if there's something wrong with the DB or host config. There was effectively no data loss, but I'm worried we might have data loss or availability issues if this error crops up on our master server. Thanks, Andrew -- MySQL General Mailing List For list archives: http://lists.mysql.com/mysql To unsubscribe:http://lists.mysql.com/mysql
Re: user last activity and log in
Am 04.10.2012 23:12, schrieb Johan De Meersman: - Original Message - From: Reindl Harald rei...@thelounge.net it does not matter what kind of users I'm happy for you that you still have all the answers anyone could ever want, Harald. not all but the one to the topic IT IS IMPOSSIBLE MYSQL CAN NOT DO WHAT THE OP WANT Regardless of having any background knowledge on the circumstance of the question, even. mysql can not an dwill not log user-logins You truly are a gifted individual. your opinion, but the answer to the question of the OP is simply NO you can't using the general query log can only be a bad joke you will log EVERY query and not only log-ins Yes, which is why I specified explicitly that it is very much discouraged for production use. it is NOT the answer to the question damned it doe NOT log the last login of a mysql user in a USEABLE form Now you may do things differently, and you may also reach a satisfactory solution; but I am absolutely sick and tired of hearing how your way is the only valid way i don't give a damn about what you are tired of the answer to I want to find the last time the given list of users logged in. Is there any mysql table from where i can retrieve the data is SIMPLY NO and not a useless full query log casually implying that the rest of the world are all bloody idiots maybe in this case your conclusion i liked to call you a bloody idiot for bringing full query log as answer comes because you realized how useless the idea is that should just shut up and listen while you tell them every ridiculous way in which they are wrong and inferior maybe you should shut up yourself as long you are hypersensible learn to accept that there are a lot of different ways to do things again: your solution full query log is not one if you can't face the truth this is your problem and that sometimes people pick their optimal solution on quite different criteria than the ones you use. if someone does not like answers he should not ask questions There's More Than One Way To Do It. full query og is none of them if it takes SIX hours for your reply in the way you did here my conclusion is that you recently came home drunken and should go to bed signature.asc Description: OpenPGP digital signature
RE: InnoDB corrupt after power failure
I hope you turned OFF caching on the drives, themselves. The BBU should be the single place that caches and is trusted to survive a power outage. -Original Message- From: Andrew Miklas [mailto:and...@pagerduty.com] Sent: Thursday, October 04, 2012 2:16 PM To: Manuel Arostegui Cc: mysql@lists.mysql.com Subject: Re: InnoDB corrupt after power failure Hi Manuel, Thanks for the fast reply. On Oct 4, 2012, at 12:05 AM, Manuel Arostegui wrote: snip it shouldn't be a biggie if you have a BBU. Do you guys use HW RAID + BBU? We've checked with our hosting provider, and the database was indeed stored on a BBU RAID. What's your innodb_flush_log_at_trx_commit value? mysql show variables like 'innodb_flush_log_at_trx_commit'\G *** 1. row *** Variable_name: innodb_flush_log_at_trx_commit Value: 1 1 row in set (0.00 sec) Have you tried playing with innodb_force_recovery option to try to get the server started at least? That way you might be able to identify which table(s) is/are the corrupted one and the one(s) preventing the whole server from booting up. As the affected machine was just a read only slave, it was easier for me to get things back into service by just reloading off the master. Unfortunately, I didn't think to keep the corrupted ibd files for later debugging. At this point, I'm more trying to figure out if there's something wrong with the DB or host config. There was effectively no data loss, but I'm worried we might have data loss or availability issues if this error crops up on our master server. Thanks, Andrew -- MySQL General Mailing List For list archives: http://lists.mysql.com/mysql To unsubscribe:http://lists.mysql.com/mysql -- MySQL General Mailing List For list archives: http://lists.mysql.com/mysql To unsubscribe:http://lists.mysql.com/mysql
Re: InnoDB corrupt after power failure
Hi Rick, On Oct 4, 2012, at 2:40 PM, Rick James wrote: I hope you turned OFF caching on the drives, themselves. The BBU should be the single place that caches and is trusted to survive a power outage. The DB server in question is running in a virtualized environment, so the array shows up as a SCSI device inside our VM. I can't use hdparm to directly check whether the disks are doing write caching, but our hosting provider assures us that once data is sent to the virtual SCSI device from inside the VM, it will be persisted to disk even if there's a power failure. I'm a bit suspicious of a recent change we did to switch our ext3 journals from data=ordered to data=writeback. The ext3 docs say a crash+recovery can cause incorrect data to appear in files which were written shortly before the crash [1]. As a result, if a tablespace were extended just before the power failure, it might be possible that when MySQL restarts, it will see random data at the end of the tablespace. It seems like this could happen even if the disks are BBU / not write caching, because the increase of the ibd's file size in the inode and the zeroing out of the new blocks assigned to the file are not atomic with respect to one another. Is the InnoDB recovery process OK with this scenario? Has anyone else seen corruption problems with data=writeback? -- Andrew [1] http://lxr.linux.no/linux+v3.5.2/Documentation/filesystems/ext3.txt -- MySQL General Mailing List For list archives: http://lists.mysql.com/mysql To unsubscribe:http://lists.mysql.com/mysql
Re: user last activity and log in
Hi, 2012/10/4 Reindl Harald h.rei...@thelounge.net Am 04.10.2012 17:28, schrieb Aastha: I want to find the last time the given list of users logged in. Is there any mysql table from where i can retrieve the data or any specific sql no - because this would mean a WRITE QUERY in the mysql-database for every connection - having a web-application with hundrets of calls per second would kill the performance No because MySQL does not have this facility. (5.6) Saying that a feature is not present because the hypothetical implementation would impact performance doesn't make much sense in my opinion. this makes pretty no sense and is NOT the job of a RDBMS implement it in your application / db-abstraction-layer I can suggest a reading here: http://www.amazon.com/Implementing-Database-Security-Auditing-Examples/dp/183342 Regards -- Claudio
RE: InnoDB corrupt after power failure
On Linux, XFS is preferred. Noop or Deadline, not CFQ is preferred. I don't know if any of this has any impact on the crash you describe. I am quite suspicious of VMs. -Original Message- From: Andrew Miklas [mailto:and...@pagerduty.com] Sent: Thursday, October 04, 2012 3:21 PM To: Rick James Cc: Manuel Arostegui; mysql@lists.mysql.com Subject: Re: InnoDB corrupt after power failure Hi Rick, On Oct 4, 2012, at 2:40 PM, Rick James wrote: I hope you turned OFF caching on the drives, themselves. The BBU should be the single place that caches and is trusted to survive a power outage. The DB server in question is running in a virtualized environment, so the array shows up as a SCSI device inside our VM. I can't use hdparm to directly check whether the disks are doing write caching, but our hosting provider assures us that once data is sent to the virtual SCSI device from inside the VM, it will be persisted to disk even if there's a power failure. I'm a bit suspicious of a recent change we did to switch our ext3 journals from data=ordered to data=writeback. The ext3 docs say a crash+recovery can cause incorrect data to appear in files which were written shortly before the crash [1]. As a result, if a tablespace were extended just before the power failure, it might be possible that when MySQL restarts, it will see random data at the end of the tablespace. It seems like this could happen even if the disks are BBU / not write caching, because the increase of the ibd's file size in the inode and the zeroing out of the new blocks assigned to the file are not atomic with respect to one another. Is the InnoDB recovery process OK with this scenario? Has anyone else seen corruption problems with data=writeback? -- Andrew [1] http://lxr.linux.no/linux+v3.5.2/Documentation/filesystems/ext3.txt -- MySQL General Mailing List For list archives: http://lists.mysql.com/mysql To unsubscribe:http://lists.mysql.com/mysql
RE: user last activity and log in
In looking at a couple hundred machine, I see that Connections / Uptime has a median of about 0.5 (one connection every 2 seconds) and a max of about 140. 140 writes to some audit table _might_ have a small impact on the system. -Original Message- From: Claudio Nanni [mailto:claudio.na...@gmail.com] Sent: Thursday, October 04, 2012 3:51 PM To: Reindl Harald Cc: mysql@lists.mysql.com Subject: Re: user last activity and log in Hi, 2012/10/4 Reindl Harald h.rei...@thelounge.net Am 04.10.2012 17:28, schrieb Aastha: I want to find the last time the given list of users logged in. Is there any mysql table from where i can retrieve the data or any specific sql no - because this would mean a WRITE QUERY in the mysql-database for every connection - having a web-application with hundrets of calls per second would kill the performance No because MySQL does not have this facility. (5.6) Saying that a feature is not present because the hypothetical implementation would impact performance doesn't make much sense in my opinion. this makes pretty no sense and is NOT the job of a RDBMS implement it in your application / db-abstraction-layer I can suggest a reading here: http://www.amazon.com/Implementing-Database-Security-Auditing- Examples/dp/183342 Regards -- Claudio -- MySQL General Mailing List For list archives: http://lists.mysql.com/mysql To unsubscribe:http://lists.mysql.com/mysql
Re: user last activity and log in
beside the fact that msql CAN NOT do this at all the median is not really releavt in the median you see also night hours with zero load on a typical webserver with load you have much more * a cms system * many page requests per second * no you can not use persistent connections if you have let's say 100 databases and 100 domains with 500 prefork pcroesses because these would mean in the worst case 5 connections * enable query log on machines with some hundret queriers per second would be a self DOS and fill your disks Am 05.10.2012 01:26, schrieb Rick James: In looking at a couple hundred machine, I see that Connections / Uptime has a median of about 0.5 (one connection every 2 seconds) and a max of about 140. 140 writes to some audit table _might_ have a small impact on the system. -Original Message- From: Claudio Nanni [mailto:claudio.na...@gmail.com] Sent: Thursday, October 04, 2012 3:51 PM To: Reindl Harald Cc: mysql@lists.mysql.com Subject: Re: user last activity and log in Hi, 2012/10/4 Reindl Harald h.rei...@thelounge.net Am 04.10.2012 17:28, schrieb Aastha: I want to find the last time the given list of users logged in. Is there any mysql table from where i can retrieve the data or any specific sql no - because this would mean a WRITE QUERY in the mysql-database for every connection - having a web-application with hundrets of calls per second would kill the performance No because MySQL does not have this facility. (5.6) Saying that a feature is not present because the hypothetical implementation would impact performance doesn't make much sense in my opinion. this makes pretty no sense and is NOT the job of a RDBMS implement it in your application / db-abstraction-layer I can suggest a reading here: http://www.amazon.com/Implementing-Database-Security-Auditing- Examples/dp/183342 signature.asc Description: OpenPGP digital signature
Re: user last activity and log in
My friend Dave Holoboff wrote this up some time ago: http://mysqlhints.blogspot.com/2011/01/how-to-log-user-connections-in-mysql.html You know you people sound like children. Really unprofessional. Go ahead --- call me names. i left middle school almost 30 years ago. It won't bother me. Can we knock off the name calling and actually offer advice and possible solutions? I thought that was what this list was for. For those of us out in the field doing things ... This might be your ticket. It requires a restart of MySQL (which may or may not be acceptable) bit it's a fairly clean solution. Minimal load, easy to query for your last connection time and how often connections are made by a user. Again, requires a restart to enable (and disable) . Oh, and users with super privileges won't be logged. Thanks, Keith -- Keith Murphy Senior MySQL DBA Principal Trainer Paragon Consulting Services http://www.paragon-cs.com 850-637-3877 -- * * (c) 850-637-3877
Re: user last activity and log in
One small correction. Init-connect doesn't require a restart of MySQL. I was thinking of init-file. So that's even better. On Thursday, October 4, 2012, Keith Murphy wrote: My friend Dave Holoboff wrote this up some time ago: http://mysqlhints.blogspot.com/2011/01/how-to-log-user-connections-in-mysql.html You know you people sound like children. Really unprofessional. Go ahead --- call me names. i left middle school almost 30 years ago. It won't bother me. Can we knock off the name calling and actually offer advice and possible solutions? I thought that was what this list was for. For those of us out in the field doing things ... This might be your ticket. It requires a restart of MySQL (which may or may not be acceptable) bit it's a fairly clean solution. Minimal load, easy to query for your last connection time and how often connections are made by a user. Again, requires a restart to enable (and disable) . Oh, and users with super privileges won't be logged. Thanks, Keith -- Keith Murphy Senior MySQL DBA Principal Trainer Paragon Consulting Services http://www.paragon-cs.com 850-637-3877 -- * * (c) 850-637-3877 -- Keith Murphy Senior MySQL DBA Principal Trainer Paragon Consulting Services http://www.paragon-cs.com 850-637-3877
