symfony1 - how to increase performance of mysql query if we have more than 1 million records? -

-

in user table have more 1 million records how can manage using mysql, symfony 1.4. make performance better.

so can give quick output.

to improve performance of designed system can increase resources. typically, these days, cheapest way distribute task.

for example slow thing in rdbm system reading , writing storage (typically rdbms systems start i/o bound, is, wait data read or written storage).

so, offset, commonly rdbms allow split table across multiple hdds, multiplying i/o performance (approach similar raid0).

adding more hard disks increases performance. goes on maximum i/o system support (either because system can not push more data through circuits or because need crunch numbers bit when fetches them becomes cpu bound; optimally utilising both)

after have start multiplying systems distributing data across database nodes. work either rdbms must support or there should application layer coordinate distributing tasks , merging results, things still scale.

i 512 systems have trillion records cached (10^12) , achieve relatively nice performance. should specify kind of performance looking - there difference between full text searches on terra-records , running simple fetches , updates. also, work 500ms (or more) considered performance , other work horrible.


Comments

Post a Comment

Popular posts from this blog

android - Spacing between the stars of a rating bar? -

-
ho can set spacing beween stars? thats ratingbar: ratingbar = (ratingbar) inflater.inflate(r.layout.ratingbar, null); ratingbar.setlayoutparams(new layoutparams(layoutparams.wrap_content, layoutparams.wrap_content)); the layout: <?xml version="1.0" encoding="utf-8"?> <ratingbar xmlns:android="http://schemas.android.com/apk/res/android" style="@style/mystyle" android:layout_alignparentright="true" android:layout_height="19dp" android:layout_width="wrap_content" android:numstars="5"> </ratingbar> the style: <style name="mystyle" parent="@android:style/widget.ratingbar"> <item name="android:progressdrawable">@drawable/android_r2_ratingstar_yellow</item> <item name="android:indeterminatedrawable">@drawable/android_r2_ratingstar_grey</item> </style> thanks, cheers you have
Read more

aspxgridview - Devexpress grid - header filter does not work if column is initially hidden -

-
i'm using devexpress grid , i'm trying 'country' column display header filter properly: <dx:gridviewdatacolumn caption="country" fieldname="countryname" showincustomizationform="true" visible="false"> <settings allowheaderfilter="true"/> </dx:gridviewdatacolumn> if 'country' column set visible='true', header filter displayed should(it shows value option list). however, want 'country' column hidden, available in customization window(like in code above). in case, when column dragged outside customization window , grid , header filter clicked, javascript error encountered: element null element.addeventlistener(eventname, func, true); is known bug? there workarounds? set aspxgridview.settings.showheaderfilterbutton property true resolve problem. the following markup works fine me (i using dxperience 10.1.7): <asp:accessdatasource id="accessda
Read more

c# - How to execute a particular part of code asynchronously in a class -

-
i creating speech recognition engine that's going respond user commands.i have created button enable , disable speech recognition per user convenience.i have used dispose() of speech engine disable speech recoginition.here code private void button1_click(object sender, routedeventargs e) { engineon = !engineon; if (engineon) { speechengine = speech.createspeechengine(); //speech class creates , returns new speech engine. speechengine.audiolevelupdated += new eventhandler<audiolevelupdatedeventargs>(speechengine_audiolevelupdated); // use system's default microphone speechengine.setinputtodefaultaudiodevice(); speechengine.loadgrammar(new dictationgrammar()); // start listening speechengine.recognizeasync(recognizemode.multiple); } else { speechclass.myengine.dispose(); } } but disposal of speech obj
Read more