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  • Migrating data from Oracle database to Pervasive .DAT files

    - by kaychaks
    The requirement is to migrate some tables with data from a Oracle database server to Pervasive database's .DAT file. Then those .DAT files will be used by a Pervasive database server. The restriction is that Oracle DB can not directly migrate to the Pervasive DB. It has to generate the .DAT files and then the new .DAT files will replace the old one for the Pervasive DB which will then use them for the new data. I was trying this task with SSIS. Exporting the Oracle table to a delimited .txt file and then creating a .DAT file from that text file. I can export the data from Oracle to .txt but I am not finding any way to migrate .txt to Pervasive .DAT? Is this the right approach? If not then please help with my problem.

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  • MySQL too many connections

    - by Webnet
    On my server I have 7 databases. Our server has 512 MB of RAM which I'm getting upgraded this evening to 2GB and has a 2.4 single processor. I've gotten an error about the connection limit exceeded. With increasing my RAM, is it ok to increase the number of connections? Currently it's set to 200 but a single page may connect to 3-4 databases considering JOINs and things. We've setup so many databases for mere organization. We have a total of about 250-300 tables in all of the databases. Any advice would be appreciated :)

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  • Oracle sysman password reset and enterprise manager

    - by Aboxy
    We are running oracle 10g.yesterday we had to reset sysman(and all other sys acounts)user with alter user command. Password change command worked by oracle enterprise manager does not see the database running. As per oracle docs,we did change the password(and encryption setting) and restarted the dbconsole service. Password does get encrypted after restarted but em still does not see the database online. Are we missing any other important step? Thanks Aboxy

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  • Deleting MySQL rows causes lock table error

    - by Dave L
    I had a couple million rows to delete but they can't be deleted at once without this error ERROR 1206 (HY000): The total number of locks exceeds the lock table size So I wrote a script to delete 100,000 rows 10,000 at a time. It ran once but when I run it a second time I get the error on the first attempt to delete 10,000. The way I'm trying to delete the 10,000 rows is to use a delete statement that refers to all 2 million rows but I use a limit clause to affect only 10,000. I've tried adding an "unlock tables;" statement to the script before the first delete but that doesn't help. I still get the lock table error on the first delete. Any ideas how I can do this? Is there a way I can tell it NOT to lock records? I can make sure nothing else is accessing the table.

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  • Backing up MySQL DB wtih mixture of innodb and myisam tables

    - by madphp
    I have a large database (almost 1GB) and it has a mixture of innodb and myisam tables. Does anyone have any general tips when backing it up or more specifically the commands i should send to mysqldump. I see that i should lock myisam tables, and that single transactions for innodb, but what if i have both. Also, what is actually happening when i lock an entire (very big) table on a production database.

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  • Why is MySQL table_cache full but never used

    - by Jeremy Clarke
    I have been using the tuning-primer.sh script to tune my my.cnf settings. I have most things working well but the part about TABLE CACHE makes no sense: TABLE CACHE Current table_cache value = 900 tables. You have a total of 0 tables You have 900 open tables. Current table_cache hit rate is 1% , while 100% of your table cache is in use. You should probably increase your table_cache When I do SHOW STATUS; I get the following table-related numbers: Open_tables = 900 Opened_tables = 0 It seems like something is going wrong. I have some extra memory I could use on increasing the table_cache size, but my sense is that the 900 tables already available aren't doing anything, and increasing it will just waste more energy. Why might this be happening? Are there other settings that could cause all my table_cache slots to be used even though there are no hits to them? I have 150 max connections and probably no more than 4 tables per join, FWIW. Here is the tuner script output for temp tables, which I've also been tuning: TEMP TABLES Current max_heap_table_size = 90 M Current tmp_table_size = 90 M Of 11032358 temp tables, 40% were created on disk Perhaps you should increase your tmp_table_size and/or max_heap_table_size to reduce the number of disk-based temporary tables. Note! BLOB and TEXT columns are not allow in memory tables. If you are using these columns raising these values might not impact your ratio of on disk temp tables.

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  • MySQL slave server from dumps

    - by HTF
    I've created a slave server from live machine which is acting as a master now. I use the following procedure to create it: mysqldump --opt -Q -B --master-data=2 --all-databases > dump.sql then I imported this dump on the new machine, applied the "CHANGE MASTER TO..." directive with a log file/position from the dump. Please note that I have around 8000 databases and I didn't stop the master while the dumps were running. The replication works fine but is this a properly method for creating a slave server? I'm planning to promote this slave to a master (different location) so I would like to make sure that there is a 100% data consistency between the servers. I've found this article where it says: The naive approach is just to use mysqldump to export a copy of the master and load it on the slave server. This works if you only have one database. With multiple database, you'll end up with inconsistent data. Mysqldump will dump data from each database on the server in a different transaction. That means that your export will have data from a different point in time for each database. Thank you

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  • Doing a mysql dump causes swapping issues

    - by DFischer
    I do a mysqldump manually every night. I just noticed that after it is done and I try to access the website it is very slow. After I take a look at the free -mh I notice that the server is now swapping when it otherwise wasn't before the mysqldump. What am I to do in this case? Just restart the server every time I backup? That doesn't seem very effective. My database file raw is 1.1gb after the dump.

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  • How to create a mysql database that can contain any character, also different languages

    - by Jakke
    I'm trying to create a database that has to contain articles in different languages. I'm using Mariadb as my server and I know bits of SQL. My knowledge doesn't really cover details like the differences between engines like MyISAM, InnoDB etc or character sets like utf8/16/32, latin 5/7/etc. I do know that the character set has importance, I guess what I'm looking for is an all-encompassing character set and an engine that best deals with this type of content. Also, is there an advantage in storing articles in multiple data rows (equivalent of different pages) to make things a little faster, or would you store a whole article in a single data row. Or does that depend on the size of the articles? Sorry for my noobish question, I know the information is all out on the internet but it would take me quite a long time to research and get a grip on everything. Would be cool if someone with experience could give me a little head start and point me in the right direction. This is for a intranet site, consider the content to be somewhat like a blog (and no, I don't want wordpress or something similar at this point). Not sure if it matters, but I tend to create and manipulate my tables with phpmyadmin, I use apache as web server and it all runs on Linux.

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  • MySQL "Host" permissions

    - by Wayne M
    Exactly what is the best way to configure this? I have a user account for a web app specified, but I also want to connect to the database via a GUI. The host is specified as % but the GUI tool repeatedly says access denied although I am using the proper password. If I change this to localhost then I can connect via the command line, but not via the GUI. If I add two entries, then I can connect via the command line and not the GUI. Leaving only the % doesn't let me connect via the command line OR the GUI. I want to be able to connect both on the actual server (via the web app itself) AND via the GUI tool.

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  • SASL (Postfix) authentication with MySQL and SHA1 pre-encrypted passwords

    - by webo
    I have a Rails app with the Devise authentication gem running user registration and login. I want to use the db table that Devise populates when a user registers as the table that Postfix uses to authenticate users. The table has all the fields that Postfix may want for SASL authentication except that Devise encrypts the password using SHA1 before placing it in the database. How could I go about getting Postfix/SASL to decrypt those passwords so that the user can be authenticated properly? Devise salts the password so I'm not sure if that helps. Any suggestions? I'd likely want to do something similar with Dovecot or Courier, I'm not attached to one quite yet.

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  • How do I mirror a MySQL database?

    - by user45745
    I'm running two load balanced servers for one website, and I'd like the databases to be synchronized. Queries may be run on either of the two servers because they are both production sites, so the replication can't just work one way. It doesn't have to be in real-time, just fairly accurate so people don't notice a difference when they get switched to a different server.

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  • Oracle sysman password reset and enterprise manager

    - by Aboxy
    We are running oracle 10g.yesterday we had to reset sysman(and all other sys acounts)user with alter user command. Password change command worked by oracle enterprise manager does not see the database running. As per oracle docs,we did change the password(and encryption setting) and restarted the dbconsole service. Password does get encrypted after restarted but em still does not see the database online. Are we missing any other important step? Thanks Aboxy

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  • Extracting a line section of mysql backup using sed

    - by carpii
    I occasionally need to extract a single record from a mysqlbackup To do this, I first extract the single table I want from the backup... sed -n -e '/CREATE TABLE.*usertext/,/CREATE TABLE/p' 20120930_backup.sql > table.sql In table.sql, the records are batched using extended inserts (with maybe 100 records per insert before it creates a new line starting with INSERT INTO), so they look like... INSERT INTO usertext VALUES (1, field2 etc), (2, field2 etc), INSERT INTO usertext VALUES (101, field2 etc), (102, field2 etc), ... Im trying to extract record 239560 from this, using... sed -n -e '/(239560.*/,/)/p' table.sql > record.sql Ie.. start streaming when it finds 239560, and stop when it hits the closing bracket But this isnt working as I hoped, it just results in the full insert batch being output. Please can someone give me some pointers as to where Im going wrong? Would I be better off using awk for extracting segments of lines, and use sed for extracting lines within a file?

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  • MySQL gzipped Export in PhpMyAdmin has wrong size in Mozilla

    - by Michal Gow
    That is really strange. I am using PhpMyAdmin 2.11.9.6 on Linux hosting. While I am Exporting databases using "gzipped" compression in Mozilla, I am getting files which have size of uncompressed database, but they seems to be downloading in incredible speed (10 times quicker than is possible using my ISP). So at the end: for database of 10M size I am getting 10M gzip downloaded in miniseconds it has indeed shown 10M size on drive it is corrupted Zip compression is working just fine (I am getting file with cca 1M size with fine content of compressed database) And the weirdest thing: that is happening for Mozilla Firefox (13.0.1) only, Internet Explorer 9 is downloading correct gzipped files... Any hint?

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  • Backing up a 22 GB MySQL database daily

    - by unknown (yahoo)
    Right now I am able to do the backup using mysqldump. But I have to take down the web server AND it takes around 5 minutes to do the backup. If I don't take down the web server, it takes forever and never finishes + the website becomes inaccessible during the backup. Is there a quicker/better way to backup my 22 GB and growing database? All the tables are MyISAM.

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  • 10 Million records = wiped MySQL DB?

    - by Josh K
    So I was trying to load some test data and it appears to have killed my entire database. This is one case where it's great to have backups! They were all plain insert queries, probably about a 900 MB file. What could have gone wrong?

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  • innodb memory usage mysql

    - by Tiddo
    I have a small vps, with only 256mb of ram, with maximum burst up to 512mb. When I configure my vps without innodb, it only uses 130 mb of ram, so that is no problem for me. But when I turn on innodb, The memory usage grows to about 300-400 mb. Is it possible to run innodb such that I won't exceed the 256mb? preferably I don't want to use more than 100mb for innodb. I already came across some sites which said I could limit the memory usage, but if I limit it to only 100mb will the db run well enough? (compared to for example the MyISAM storage engine) If 100mb is to little memory for innodb, can you recommend me any other storage engine which supports transactions?

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  • Centos/MySQL Server Tweaking

    - by josephs8
    If I wanted a professional to like tweak my server where would I go about finding someone that does this? I have a web server that gets a lot of traffic and Im learning all about managing web servers, but before my traffic gets out of hand I want the server tweaked up. I already have some high load issues so I wanted to see if they could help with that. Then I would continue my learning on my own. Thank You

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