python - Dealing with Concurrent Requests & Connections in Cloud SQL -


we have created app on app engine using datastore. have been led using cloud sql wanted use joins, nested queries , functions such average, total etc. data gets migrated datastore cloud sql daily cron jobs.

i going through below links know basic details related performance , limitations.

so far looks tier d0 or d1 serve purpose intended.

few things confusing me:

a) pending connection , how affect ? not sure if throws 1033 instance has many concurrent requests, when exceeds 100. how handle ? can create 250 connections use 100 @ time ?

b) 250 concurrent connections. should throw error many connections if exceeds 250

c) per app engine instance 12 concurrent connections per sql instance. how ensure no more 12 connections per app engine instance ?

i have gone through following forums:

what connection limits google cloud sql app engine, , how best reuse db connections?

what's approach managing db connection in google cloud sql (gae) python app?

but people face issues in that.

d) got operationalerror:

(2013, "lost connection mysql server @ 'reading initial communication packet', system error: 38") error when tried test 1000+ requests.

we have 1500+ people using our system concurrently , looks fail. confused if can use cloud sql due above mentioned issues. solutions should available though.

can help?


Comments

Post a Comment

Popular posts from this blog

php - Wordpress website dashboard page or post editor content is not showing but front end data is showing properly -

Image
recently have uploaded wordpress site onto server. have uploaded wordpress site in sub-folder under root folder ../root(domain root folder)/wordpress (where host wordpress folder). now problem content data in page or post in dashboard of wordpress admin panel not showing - see image. but data showing in front view - see image. if not browser cache issue , not issue happened tinymce editor during upgrade; try add config file: define('concatenate_scripts', false);
Read more

javascript - Get parameter of GET request -

i make request: createxhrrequest( "get", fileurl, function( err, response ) { if( err ) { alert( "error get!" ); } alert(response); }); and full response: { "status" : "ok", "message" : "jvberi0xljqkjdduxdgkmy how can jvberi0xlj ? i try response.message , response["message"]. nothing works. just simple access this: var json = json.parse(response); json.message
Read more

javascript - Twitter Bootstrap - how to add some more margin between tooltip popup and element -

Image
i have not tryed since can't understand space between tooltip , element made/added bootstrap, tooltip near element triggers tooltip event. i make tooltip opening little bit away element, add more margin tooltip , eleemnt mean. i understand how in css if possible , if possible make both right,left,top,bottom tooltips hope question clear. this how tooltips looks on app: and , how should looks after this default css tooltip on top : .tooltip.top { padding: 5px 0; margin-top: -3px; } you can override in own css : .tooltip.top { margin-top: -10px; } note code work work tooltip on top, you'll nedd adapt css 3 other orientations : .tooltip.top { margin-top: -10px; } .tooltip.right { margin-left: 10px; } .tooltip.bottom { margin-top: 10px; } .tooltip.left { margin-left: -10px; }
Read more