The onstat -g prc option prints the number of sessions currently using the UDR or SPL routine.
IBM Informix Dynamic Server Version 10.00.UC1 -- On-Line -- Up 01:59:00 -- 101376 Kbytes
Stored Procedure Cache:
Number of lists : 31
PC_POOLSIZE : 50
Number of entries : 0
Number of inuse entries : 0
Stored Procedure Cache Entries:
list# id ref_cnt dropped? heap_ptr procedure name
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Stored Procedure Cache is empty.