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17 views

Galera cluster consume many CPU percent and CPU high load

I have implemented a cluster include three nodes: two stored nodes and one garbd (also haproxy - load balancer). Some information about servers: SSD 480G Raid1 Memory 32G Swap 16G 2xCPU, number of ...
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0answers
97 views

How can I load csv data into mongodb and choose the types I'd like to have created for each column?

I'm looking for a way to load csv data in mongodb and specify the types that I'd like to have created for each column? I've been using mongoimport but I find it quite painful because there doesn't ...
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1answer
13 views

Determining which database instance makes biggest IO

Assuming that I have a dedicated server on which I am running multiple instances of mysql and postresql servers. How without iotop determine which instance in particular time (proc/pid/io shows data ...
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1answer
208 views

DB2 LOAD: Poor performance while loading table with large BLOBs

I need help regarding LOAD-command with BLOBs. I notice very poor performance while loading a table which contains large BLOBs. While tracing the OS, I only have about 15MB/sec I/O-speed. But in ...
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1answer
414 views

MySQL warnings while loading integer data into table (SOLVED)

For some reason, after loading a large amount of data into the following table (from a single file), all of the values register as 0. CREATE TABLE secondTable ( freq int NULL, w1 int NULL, w2 int ...
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1answer
661 views

Syntax error in load data infile

I don't know why I am getting a syntax error. I have checked my query carefully many times and read up on mysql reference for load data infile and everything seems fine. Here is my query: LOAD DATA ...
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2answers
154 views

Database is slow once in a while

I am executing a web service for 100 times. The average response time of this service is 1.5 seconds. But when I look at the response time of each execution individually, there are a few executions ...
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2answers
56 views

Is it safe for me to switch from an 8GB server to a 4GB server? (Stats inside)

We are looking to cut some of our server costs and the only place I think it might be possible is our db server. We're currently running an 8GB rackspace cloud that houses a mysql instance and I ...
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153 views

MySQL Load Avg High — CPU bound or IO Bound or Memory Issues

We are using MySQL 5.5 and the database is approximately 10TB. The load avg is constantly high during day time. Following are the configurations and a snap shot of a 'top' command. I wanted ...
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133 views

My queries are slow under load

I am performing a load test for my application. All my SQL queries which are fired from my application, individually look better and perform fast. The same SQL are becoming bottleneck when they are ...
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1answer
3k views

High average load due to the High mysql cpu usage

i've got 2 warnings about my average load being high in the past week and apparently it has to do something with the mysql my daily visit has been increased about 10-20 thousand (total of 180-150 ...
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0answers
223 views

MySQL stops responding (at almost regular intervals)

Using mysqld (latest xampp version). My.ini port= 3306 socket = "D:/xampp/mysql/mysql.sock" basedir = "D:/xampp/mysql" tmpdir = "D:/xampp/tmp" datadir = "D:/xampp/mysql/data" pid_file = "mysql.pid" ...
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1answer
146 views

MySQL Replace function throwing error

I am trying to update ^G (Ctrl G) in a table, below is scenario- CREATE TABLET TEST(COLA INT,DESCRIPTION VARCHAR(20)); I have crtl G in my data for description field, so to replace it with a \,I am ...
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2answers
2k views

What is the difference between NULL and \N while loading data from a csv using load data local infile

I have a table which has four fields create table test_hc1(cola int,colb int,colc varchar(20),cold int); Now, I am trying to load following data 1,2,\N,4 and the third field in table is coming ...
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2answers
2k views

ESCAPED BY clause in LOAD DATA INFILE

Can somebody please help me understand what is ESCAPED BY clause means in LOAD DATA LOCAL INFILE statement MySQL 5.5. I am a newbie to MySQL so please bear with me.
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1answer
815 views

mongostat causing CPU 100%

On a 64Bit Debian 6 OS with 4 CPU cores and 8GB RAM, I can reproduce an issue with mongostat. Whenever I create an index, reIndex or even index in background, according to top, the CPU load is 40-60% ...
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1answer
648 views

DB2 Load Failure due to timestampformat

I'm trying to load a file into DB2 database table using DB2 Load. I'm able to load the file, using the following statement from the unix prompt. db2 +p -x load from BOM_Sales_20130326.txt of DEL ...
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2answers
2k views

High Mysql Load , over 700% CPU

I had high mysql load on server linux 64 bit , 24 G.B ram , Intel(R) Core(TM) i7 CPU 950 @ 3.07GHz , Alot of quiers in sending data mode Here is mysql status ...
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1answer
323 views

Integer comparison in MySQL. does it cause lots of overhead?

I have an 8 digit number in my db. I want to do a select on the table in MySql (Innodb) and get the list of all numbers that are equal or smaller than my number. Then I sort them from larger to ...
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1answer
480 views

Is SET INTEGRITY of any use after IMPORT statements, or just after LOAD statements?

I'm getting the feeling, both from documentation and empirically, that you can only put SET INTEGRITY to good use after a LOAD, not after an IMPORT. LOAD is mentioned for SET INTEGRITY, but not ...
3
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1answer
378 views

Named pipes connection closed when subjected to load

We're hosting a service where we have a messaging service. When a message arrives, it checks which subscribers it should be sent to by connecting to the database, and querying the subscriptions ...
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1answer
550 views

Do database servers need load balancing?

I am trying to build a 1TB database on MySQL which will need strong read performance. I intend to replicate my database to prevent downtime. Do my database servers need load balancing to improve ...
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2answers
808 views

How do I import a specific line from a text file into MySQL

I'm building an app to import data from a text file to a database. I want to import only specific lines from the text file. With Navicat I found that we could limit number of line when importing ...
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3answers
2k views

DB2 LOAD data into table - Interpreting the error messages

I encountered some constraint issues when loading data from file into table ** SQL3109N The utility is beginning to load data from file "xag". SQL3500W The utility is beginning the "LOAD" phase at ...