Re: Last established connection timestamp by a specific user

2017-10-10 Thread Singer Wang
Unfortunately not with the standard configuration. You're best bet going forward would be to look at MySQL Enterprise Audit - https://www.mysql.com/products/enterprise/audit.html On Tue, Oct 10, 2017 at 3:54 PM, Gone, Sajan wrote: > Hi, > >We have a MySQL instance which is currently runnin

Re: Changing storage engine in dump file.

2015-08-13 Thread Singer Wang
Depending on the version of MySQL and InnoDB engine, the max key length can be 3072 for InnoDB.. On Wed, Aug 12, 2015 at 9:21 AM, Johan De Meersman wrote: > > - Original Message - > > From: "geetanjali mehra" > > Subject: Changing storage engine in dump file. > > > > Is there any implic

Re: server-side logging of query errors?

2015-06-24 Thread Singer Wang
;"}} error 1064 On Wed, Jun 24, 2015 at 11:40 AM, Tomasz Chmielewski wrote: > Normal general log also logs everything including bad queries (i.e. SLCECT > BLAH BLAH;) - although does not say if it was an error (i.e. syntax) or not. > > Does the audit plugin log the actual error? &

Re: server-side logging of query errors?

2015-06-24 Thread Singer Wang
The performance hit of the Percona Audit is 15% for disk logging and for remote syslog we found it is lower. It logs everything including bad queries (eg. select fark from fark from fark fark fark from frak). You should be able to write a JSON parser that extracts what you want based on the log (eg

Re: server-side logging of query errors?

2015-06-23 Thread Singer Wang
You could log all queries using the audit plugin, 15% hit.. On Tue, Jun 23, 2015 at 4:54 AM, Johan De Meersman wrote: > - Original Message - > > From: "Tomasz Chmielewski" > > >> It would be a mild security risk; a malicious > >> (or just stupid, see Hanlon's razor) user could spam your

Re: SHOW FULL COLUMNS QUERIES hogging my CPU

2014-06-02 Thread Singer Wang
What's your technology stack? On Mon, Jun 2, 2014 at 10:21 AM, Jatin Davey wrote: > On 6/2/2014 7:18 PM, Reindl Harald wrote: > >> >> Am 02.06.2014 15:35, schrieb Jatin Davey: >> >>> I am no expert with mysql and databases. Hence seeking out some help on >>> this forum. >>> >>> Basically i got

Re: database perfomance worries

2013-07-02 Thread Singer Wang
O On 2013-07-02 5:31 PM, "Andy Wallace" wrote: > We are on a quest to improve the overall performance of our database. It's > generally > working pretty well, but we periodically get big slowdowns for no apparent > reason. A > prime example today - in the command line interface to the DB, I tried

Re: Upgrading form mysql 5.0.90 to 5.5 or 5.6

2013-02-14 Thread Singer Wang
There are queries that works with 5.1/5.0 that do not work with 5.5, I would test extensively.. S On Thu, Feb 14, 2013 at 5:22 PM, Mihail Manolov < mihail.mano...@liquidation.com> wrote: > You could jump from 5.0 directly to 5.5 and skip 5.1. I have without any > issues. There are some configur

Re: Upgrading form mysql 5.0.90 to 5.5 or 5.6

2013-02-14 Thread Singer Wang
that are no longer permitted must be rewritten. (Bug #27525) On Thu, Feb 14, 2013 at 6:11 PM, Rick James wrote: > Singer, do you have some examples? > > > -Original Message- > > From: Singer Wang [mailto:w...@singerwang.com] > > Sent: Thursday, February 14, 201

Re: slave replication with lots of 'duplicate entry' errors

2013-02-14 Thread Singer Wang
Are you using all InnoDB? S On Thu, Feb 14, 2013 at 5:55 PM, Robert Citek wrote: > On Thu, Feb 14, 2013 at 4:54 PM, Manuel Arostegui > wrote: > > 2013/2/13 Robert Citek > >> > >> On Wed, Feb 13, 2013 at 8:59 AM, Robert Citek > >> wrote: > >> > Any other possibilities? Do other scenarios bec

Re: MySQL dying?

2012-12-04 Thread Singer Wang
Lol! Good point Karen! On Tue, Dec 4, 2012 at 1:02 PM, Karen Abgarian wrote: > A touch of realism: we are all dying. For some, it may take a while, > hopefully. > > On 04.12.2012, at 9:53, Tim Pownall wrote: > > > Mysql is used by just about every web host and is one of the most common > > da

Re: Mysql backup for large databases

2012-11-01 Thread Singer Wang
once a week) S S On Thu, Nov 1, 2012 at 11:41 AM, Reindl Harald wrote: > > > Am 01.11.2012 16:36, schrieb Singer Wang: > > On Thu, Nov 1, 2012 at 11:34 AM, Rick James rja...@yahoo-inc.com>> wrote: > > > > Full backup: > > * Xtrabackup (Backu

Re: Mysql backup for large databases

2012-11-01 Thread Singer Wang
On Thu, Nov 1, 2012 at 11:34 AM, Rick James wrote: > Full backup: > * Xtrabackup (Backup: slight impact on source; more if you have MyISAM (as > mentioned)) > * Slave (Backup: zero impact on Master -- once replication is set up) > * LVM -- a minute of server down; see below > Why do you need down

MySQL Thread Pool Plugin + Percona Server?

2012-10-31 Thread Singer Wang
Hey, I'm looking to combine the benefits of the MySQL Thread Pool Plugin and Percona-Server. All the benchmarks show that the Thread Pool Plugin handles higher concurrency much better then just setting innodb_thread_concurrency. Alas Percona server has many tweaks that improve performance. Does a

Re: Extract text from string

2012-10-12 Thread Singer Wang
Of course... There's many libraries for REGEX which you can use, link it with an UDF and boom! http://dev.mysql.com/doc/refman/5.1/en/adding-udf.html S On Fri, Oct 12, 2012 at 12:56 PM, Neil Tompkins < neil.tompk...@googlemail.com> wrote: > Hi, > > Is there such a way in a MySQL query to extr

Re: user last activity and log in

2012-10-05 Thread Singer Wang
My bad actually, the MySQL Enterprise Audit is available in MySQL 5.5 S On Fri, Oct 5, 2012 at 2:14 AM, Singer Wang wrote: > Mellow greetings, > > Enhance your calm. Lets get our facts straight and not go off our > rockers. MySQL 5.6 Enterprise edition will be able to do t

Re: user last activity and log in

2012-10-04 Thread Singer Wang
ow (thanks Keith for actually trying to help!) 3) Write your own plugin using the MySQL Plugin APIs 4) use the McAfee Audit Plugin for MySQL (Free: http://www.devshed.com/c/a/MySQL/McAfee-Releases-Audit-Plugin-for-MySQL-Users-86548/ ) Singer Wang (yes, I just watched Demolition Man) On Thu, Oct

Re: user last activity and log in

2012-10-04 Thread Singer Wang
It is possible in MySQL 5.6 S On Thu, Oct 4, 2012 at 11:30 AM, List Man 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. >

Re: Help with mysql connect_timeout

2012-09-06 Thread Singer Wang
Also check for any firewall or NAT On Sep 5, 2012 5:17 PM, "indrani gorti" wrote: > Hi all, > I am a newbie to work with the settings in mysql although I have used in > very small applications before > I am currently experimenting with very large tables and a few complicated > queries. I am usin

Re: Relational Integrity

2004-07-20 Thread Singer Wang
RAM is Cheap, so is a faster processor.. (InnoDB requires more RAM/Processor then the simpler MyISAM).. but your data and downtime is probably a lot more expensive. Its well worth it going with InnoDB. For most of what I do, I use a combination of InnoDB and HEAP Tables. On Tue, Jul 20, 2004

join synatx

2004-07-16 Thread Singer Wang
hello, reading the documentation I'm confused to as which is better: SELECT * FROM T1,T2 where T1.K1 = T2.K2 AND T1.K2=T2.K2 AND ...otherconditions... or should I do SELECT * FROM T1 NATURAL JOIN T2 WHERE ..other conditions.. or should I SELECT * FROM T1 JOIN T2 USING (K1,K2) WHERE ..other c

AES_Encrypt

2004-07-15 Thread Singer Wang
Hello, I'm tempted to use the AES_ENCRYPT/AES_DECRYPT function in MySQL; as documentation says the implementation is 128-bit AES. Thus the keys are 16bytes in length. Now the 'key_str' in the manual can be any length; how is the key generated from that? also, for multi block encryptions what mode