354246.00 93.0% s_lock /usr/lib/postgresql/9.2/bin/postgres
10503.00 2.8% LWLockRelease /usr/lib/postgresql/9.2/bin/postgres
8802.00 2.3% LWLockAcquire /usr/lib/postgresql/9.2/bin/postgres
828.00 0.2% _raw_spin_lock [kernel.kallsyms]
559.00 0.1% _raw_spin_lock_irqsave [kernel.kallsyms]
340.00 0.1% switch_mm [kernel.kallsyms]
305.00 0.1% poll_schedule_timeout [kernel.kallsyms]
274.00 0.1% native_write_msr_safe [kernel.kallsyms]
257.00 0.1% _raw_spin_lock_irq [kernel.kallsyms]
238.00 0.1% apic_timer_interrupt [kernel.kallsyms]
236.00 0.1% __schedule [kernel.kallsyms]
213.00 0.1% HeapTupleSatisfiesMVCC
We try to limit a connection to 300, but I am not sure if this issue is not related to some Postgres bug.
Regards
Pavel