The database refused a new connection.
WHAT IT MEANS
The connection limit was reached. Existing connections are held open, and no more are permitted.
COMMON CAUSES
An application opening connections without closing them Several applications on one account competing A traffic spike Slow queries holding connections open longer than they should
WHAT TO CHECK
How many applications are on the account, each holding connections Whether a slow query is holding connections Whether traffic is unusually high
IMMEDIATE RELIEF
The condition frequently clears by itself as connections time out.
If it persists, something is leaking connections.
THE UNDERLYING FIXES
Enable caching, so fewer requests reach the database at all Fix slow queries, usually by adding an index Check for code opening connections in a loop
IF YOU RUN SEVERAL SITES
Each holds connections. Several busy sites on one account reach the limit collectively.
WHAT TO SEND US
The time, how many applications are on the account, and whether it coincides with a traffic spike.
We can see connection counts from the server side.
