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server: add hasura_postgres_max_connection prometheus metric

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PR-URL: https://github.com/hasura/graphql-engine-mono/pull/10669
GitOrigin-RevId: 6d6607a6dd520866d1aa556bab1007afd1793a01
This commit is contained in:
Naveen Naidu 2024-02-20 11:29:10 +05:30 committed by hasura-bot
parent 973035dbbb
commit acd3f33bb5
2 changed files with 8 additions and 0 deletions
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4
server/lib/pg-client/src/Database/PG/Query/Pool.hs
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@ -15,6 +15,7 @@ module Database.PG.Query.Pool
PGPoolStats (..),
PGPoolMetrics (..),
getInUseConnections,
getMaxConnections,
defaultConnParams,
initPGPool,
resizePGPool,
@ -97,6 +98,9 @@ data PGPoolMetrics = PGPoolMetrics
getInUseConnections :: PGPool -> IO Int
getInUseConnections = RP.getInUseResourceCount . _pool
getMaxConnections :: PGPool -> IO Int
getMaxConnections = RP.getMaxResources . _pool
data ConnParams = ConnParams
{ cpStripes :: !Int,
cpConns :: !Int,

4
server/lib/resource-pool/Data/Pool.hs
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@ -34,6 +34,7 @@ module Data.Pool
createPool,
createPool',
resizePool,
getMaxResources,
tryTrimLocalPool,
tryTrimPool,
withResource,
@ -231,6 +232,9 @@ resizePool Pool {..} maxResources' = do
"invalid maximum resource count " ++ show maxResources'
atomically $ writeTVar maxResources maxResources'
getMaxResources :: Pool a -> IO Int
getMaxResources Pool {..} = readTVarIO maxResources
-- | Attempt to reduce resource allocation below maximum by dropping some unused
-- resources
tryTrimLocalPool :: (a -> IO ()) -> TVar Int -> LocalPool a -> IO ()