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I'm implementing a connection pool in Java (i.e. a pool of java.sql.Connection s). When should I check that connections are still valid? I don't want to do it before I lend them. Should I do it when they are returned? Every time? Is there a clever way...
Started by looeeese on
, 6 posts
by 6 people.
Answer Snippets (Read the full thread at stackoverflow):
Your algorithm....
The pool if needed.
If the pool is fully used or threshold is exceeded, then provision new connections into the pool (i.e.
Would this be influenced by how busy and fully-utilized your connection-pool is going).
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I have a set of tasks that are done repeatedly and instead of creating a new thread each time this user-invoked task needs to be performed, I'd like to use a thread-pool.
In the typical flow to create a new thread, you have to setup an auto-release pool...
Started by Justin Galzic on
, 4 posts
by 4 people.
Answer Snippets (Read the full thread at stackoverflow):
I assume that the implementation re-uses threads after....
The way you want to go about this is to use an NSOperationQueue, which will hold a queue of tasks to be done and executes as many in parallel as you wish (configurable), each on a background thread .
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I have researched this site for a while now. and im getting conflicting info with seemingly good reasons for both sides. some members are saying 3-4 time flow rate through the sump while others are saying 9-10 times flow rate. also the same about the ...
Started by husslr187 on
, 11 posts
by 10 people.
Answer Snippets (Read the full thread at reefcentral):
It keeps crap processed and cleaned....
I run about 10x through my sump.
This way your sump through the fuge is independent of the return pump flow.
Your return pump can T off and you can control the water flow to the fuge.
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Ask your Facebook Friends
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I am trying to run autogenerated code (which might potentially not terminate) in a loop, for genetic programming. I'm trying to use multiprocessing pool for this, since I don't want the big performance overhead of creating a new process each time, and...
Started by Ash on
, 4 posts
by 4 people.
Answer Snippets (Read the full thread at stackoverflow):
Process (via pool or otherwise) won't have a __name__ of '__main__' , so it will not execute anything(source) pool....
From processing import Pool import os def generated(): return.
Be in the things you've hidden as irrelevant.
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Posted 23 May 2012 - 01:42 PM
I finally got permission to build a large in-ground pond, and I figured the easiest way to heat it a couple of degrees would be the "solar black tube" method.
The pump will pump the water in pvc pipe onto the roof and then...
Started by Crystal on
, 12 posts
by 9 people.
Answer Snippets (Read the full thread at albertaaquatica):
I had a smaller 300G pool before - it hit a ....
A pool on the ground will lose lots of heat to the soil.
Posted 23 May 2012 - 02:57 PM
not sure about the flow rate and i wonder if you even need to heat inside when I could catch them.
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An attempt to place varying diagrams and explanations into one thread. index / table of context (( this post )) difference between gravity flow of water and pressurized flow of water. animated diagrams show gravity flow of water, with debrie flowing pond...
Started by boggen on
, 14 posts
by 1 people.
Answer Snippets (Read the full thread at koiphen):
Is when ever water flows from one body of water to another body of water NOT flow UP....
GRAVITY FLOW OF WATER when to identify gravity flow.
Difference between gravity flow of water and pressurized flow of water.
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Among all the other issues I am currently having that are making me wonder if I can/want to do this pond thing anymore, now all of a sudden my flow and pressure in my SAC 15 is giving me problems. Not sure if its the multi-port valve head itself or what...
Started by majederr on
, 14 posts
by 11 people.
Answer Snippets (Read the full thread at koiphen):
Zac When I had loss of flow it ended up being an air leak a similar problem with my dads pressure through the roof and no flow bw the sucker 2 or 3 times and pressure and water flow back....
The beads out and check the inlet manifold.
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I installed a heat exchanger for a swimming pool to heat my shop loop. The problem I have is the exchanger is getting 180 degree water ,but it will not put out any water hotter than 80 degrees on the other side (shop loop). It has 1-1/4" ports incoming...
Started by jimdeq on
, 13 posts
by 6 people.
Answer Snippets (Read the full thread at hearth):
I heat my pool with my oil boiler at times and heat a 45gpm flow fairly decent with the boiler up to temp does the nameplate say for specs on BTU size, flow, temp drop, etc? Do the heat supply send/return is the return....
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An attempt to place varying diagrams and explanations into one thread. the posts themselves are out of order, i would strongly encourge you to just click on the links noted below. instead of trying to find a given post some place in this thread. for those...
Started by boggen on
, 20 posts
by 3 people.
Answer Snippets (Read the full thread at koiphen):
GRAVITY FLOW OF WATER when to identify gravity ....
pool type pressurized filter )) on gravity flow filters, it may be slim pickings in finding headdifference between gravity flow of water and pressurized flow of water.
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Hello all,
I have a problem I don't have a clue on hvac.. but I have a 4200 sf house, for the past years since I moved to the house I noticed that all 3 units blow excesive air from the vents, you can hear the air coming out and feel it hard..
one person...
Started by solrac6262 on
, 13 posts
by 5 people.
Answer Snippets (Read the full thread at hvac-talk):
If the duct system & Return air flow filter capacity is way undersized return on a hall....
If the duct system & Return air flow filter capacity is way undersized for the tonnage on evaluating your situation.
Situation.
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