timeout
hello all, When I send : mysql -h address -u root -p from a distant computer I don't get connected. I think it is a timeout problem. How can I increase the timeout period. TIA mosaed
Re: timeout
If you do not connect probably you have a firewall in between, and it is not a timeout problem. You should ask your network administrators to open, if possible, that port for you. Another option is to ssh to the host and do a local connection to the MySQL instance. Cheers Claudio Nanni 2009/1/17 Mosaed zamil mzamils...@gmail.com hello all, When I send : mysql -h address -u root -p from a distant computer I don't get connected. I think it is a timeout problem. How can I increase the timeout period. TIA mosaed
Re: timeout
First, be sure you can access the host - try pinging it. Second, if you can ping the computer so you know there's no network issue, be sure you've got the mysql permissions to connect from that host to either the server or the database (if you specify one). You may have permission to connect locally or from specific computers, but unless you have an entry in mysql.user that allow you to connect either from address (as in your example) or % or some wildcarded address that includes you domain, you're not permitted to enter. Once you've eliminated these potential problems and you still can't connect contact the sys admin of the remote computer. On Sat, Jan 17, 2009 at 3:07 AM, Mosaed zamil mzamils...@gmail.com wrote: hello all, When I send : mysql -h address -u root -p from a distant computer I don't get connected. I think it is a timeout problem. How can I increase the timeout period. TIA mosaed -- Jim Lyons Web developer / Database administrator http://www.weblyons.com
RE: timeout
from a purely network point of view PING works if ICMP traffic is allowed do a tracert and find out which intervening node is rerouting the traffic you might have something funky on the routing tables Martin __ Disclaimer and confidentiality note Everything in this e-mail and any attachments relates to the official business of Sender. This transmission is of a confidential nature and Sender does not endorse distribution to any party other than intended recipient. Sender does not necessarily endorse content contained within this transmission. Date: Sat, 17 Jan 2009 07:51:55 -0600 Subject: Re: timeout From: jlyons4...@gmail.com To: mzamils...@gmail.com CC: mysql@lists.mysql.com First, be sure you can access the host - try pinging it. Second, if you can ping the computer so you know there's no network issue, be sure you've got the mysql permissions to connect from that host to either the server or the database (if you specify one). You may have permission to connect locally or from specific computers, but unless you have an entry in mysql.user that allow you to connect either from address (as in your example) or % or some wildcarded address that includes you domain, you're not permitted to enter. Once you've eliminated these potential problems and you still can't connect contact the sys admin of the remote computer. On Sat, Jan 17, 2009 at 3:07 AM, Mosaed zamil mzamils...@gmail.com wrote: hello all, When I send : mysql -h address -u root -p from a distant computer I don't get connected. I think it is a timeout problem. How can I increase the timeout period. TIA mosaed -- Jim Lyons Web developer / Database administrator http://www.weblyons.com _ Windows Live™: Keep your life in sync. http://windowslive.com/howitworks?ocid=TXT_TAGLM_WL_t1_allup_howitworks_012009
Re: help refactoring query
b wrote: I'm having some difficulty getting my head around a particular query. I'd like to make this a view once I get something working. However, all I've been able to come up with uses a sub-query. So, no view on the horizon. I have 3 tables: users id, (etc. the usual) disciplines id, name (ie. film, photography, writing, etc.) disciplines_users discipline_id, user_id Each user may have one or more discipline. The view I'm looking for shows the total number of users who have a particular discipline. NOTE: the sum of the totals is greater than the total number of users, which is by design. SELECT name, COUNT(discipline.u_id) AS total FROM ( SELECT du.discipline_id, du.user_id as u_id, d.name FROM disciplines_users AS du LEFT JOIN disciplines AS d ON d.id = du.discipline_id ) AS discipline GROUP BY discipline.name ORDER BY discipline.name; +-+---+ | name| total | +-+---+ | Dance | 176 | | Film and Television | 376 | etc. I've a feeling that this could be done without that sub-query and using another join. If not, I might make the sub-query its own view and see what the performance is like. I'd appreciate any suggestions, especially any pointers on refactoring sub-queries into joins, in general. Why not use just your subquery as your VIEW? SELECT d.id, d.name, du.user_id as u_id, FROM disciplines AS d LEFT JOIN disciplines_users AS du ON d.id = du.discipline_id GROUP BY d.id, d.name The reason I inverted the FROM and LEFT JOIN was so that if you had a discipline with 0 users, you can now see a zero. In your original orientation, a relationship had to exist or its discipline wouldn't have been counted. -- Shawn Green, MySQL Senior Support Engineer Sun Microsystems, Inc. Office: Blountville, TN -- MySQL General Mailing List For list archives: http://lists.mysql.com/mysql To unsubscribe:http://lists.mysql.com/mysql?unsub=arch...@jab.org
MySQL v5.1 loses connection if too many updates in loop
I updated from MySQL 5.01 to 5.1 a few days ago. My Delphi application runs on XP with 3GB ram. I have a query #1 that executes a simple Select statement that fetches 5000 rows from a single table sorted by date. (no joins) Inside a loop if any rows need to be updated, another query #2 will update that row and then a Next statement goes to the next row in Query#1 and this repeats until all the rows from the table are traversed. This seems pretty simple and has worked fine in v5.0.1. Since upgrading to v5.1.30 after a few hundred rows have been updated, the Next statement will hang for 60 seconds and then I get a lost connection to mysql server message. If I take the updates out of the loop, it completes just fine. So why are a few thousand updates causing a problem inside of a loop? The updates are updating 1 row at a time and does not alter any of the keys in the table. TIA Mike -- MySQL General Mailing List For list archives: http://lists.mysql.com/mysql To unsubscribe:http://lists.mysql.com/mysql?unsub=arch...@jab.org
