Innodb contains multi-version property, so it can handle more concurrent queries from user connections.
On Thu, Jan 21, 2010 at 5:07 PM, Krishna Chandra Prajapati < prajapat...@gmail.com> wrote: > Hi Suresh, > > my question is how i can run concurrent connection with the above work > load. > > Thanks, > Krishna > > > On Thu, Jan 21, 2010 at 4:46 PM, Suresh Kuna <sureshkumar...@gmail.com>wrote: > >> Hi Krishna, >> As table is using MyISAM engine and it acquires a table level lock, the >> queries will be executed one after one . >> By converting it into Innodb as it acquires a row level lock, doing a >> select and delete based on primary key will be faster and the concurrency >> increases. >> >> -- >> Thanks >> Suresh Kuna >> MySQL DBA >> >> >> >> On Thu, Jan 21, 2010 at 4:30 PM, Krishna Chandra Prajapati < >> prajapat...@gmail.com> wrote: >> >>> Hi List, >>> >>> I am working for a messaging company, sending sms to enterprise >>> customers. >>> >>> In a mysql table data is being continuously inserted by user. Most of the >>> time we have 5 to 10 millions of data in this table. >>> >>> Table name : alt_send_sms engine myisam >>> >>> From this table, i need to select data based on below parameter. Send >>> some >>> where else and then delete the selected data. >>> >>> selection and deletion part is done in bulk. >>> >>> SELECT sql_id, momt, sender, receiver, udhdata, msgdata, time, smsc_id, >>> service, account, id, sms_type, mclass, mwi, coding, compress FROM >>> alt_send_sms WHERE smsc_id = 'ite' ORDER BY msg_priority, sql_id LIMIT >>> 0,20 >>> >>> delete from alt_send_sms where sql_id in >>> (....................................................) >>> >>> sql_id is a unique bigint column with auto_increment. >>> >>> Since the selection and deletion is done in bulk. Therefore, i cannot run >>> many similar concurrent queries. As duplicate messages will be send. What >>> can be the solution for this ? >>> >>> Any response is highly appreciated. >>> >>> Thanks, >>> Krishna >>> >> >> >> > -- Thanks Suresh Kuna MySQL DBA
