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DB2 - Problem description

Problem IT08289 Status: Closed

PRIVATE MEMORY LEAK DUE TO NATIVE ENCRYPTION.

product:
DB2 FOR LUW / DB2FORLUW / A50 - DB2
Problem description:
The memory consumption on db2sysc process keeps growing only 
when native encryption is enabled. 
For example, the private segments (Esid 10,11,12.. in svmon) 
keep growing in AIX systems, and [anon] blocks in pmap keep 
increasing in Linux systems. 
 
However, the DB2 memory statistics shows no leak sign in the 
PRIVATE set, db2pd -dbptnmem and db2pd -memblock shows stable 
memory stats on private memory usage. 
 
The malloc debug in AIX shows one of major leak is observed in 
the following code path. 
 
0x090000000004a428 malloc_common_debugging 
0x090000001a0d6d0c default_malloc_ex 
0x090000001a0d7e9c C101_CRYPTO_malloc@AF28_12 
0x090000001a07bf94 efCRYPTO_malloc 
0x090000001a083b7c efCRYPTO_calloc 
0x0900000019f99098 ICCC_EVP_CIPHER_CTX_new@AF299_235 
0x0900000019f96e08 ICCC_EVP_CIPHER_CTX_new 
0x0900000019f8d2b4 ICC_EVP_CIPHER_CTX_new 
0x0900000002b62300 cryptSetupEncryptCipherCtx 
0x090000000204fcc8 
sqlexRedeemCipherTicket__FP17sqlexCipherTicketPUcUlP5sqlca 
0x0900000002339720 
sqlpEncrypt__FCPCvCUlPvT2P17sqlexCipherTicketPUcPib 
0x0900000003b64bb8 
sqlpgEncryptUserDataInNLogPages__FCPvPvCUsP17sqlexCipherTicketC 
0x0900000005ab5b80 
sqlpgWriteNLogPagesInternal__FR12SQLO_FHANDLECPvPvClCUlCPUlCUsP 
0x0900000005a6c388 
sqlpgWriteNLogPagesInternal__FR12SQLO_FHANDLECPvPvClCUlCPUlCUsP 
0x0900000005a6c184 
sqlpgWriteNLogPages__FR12SQLO_FHANDLECPvPvCUlClT4CPUlCUsP17sqle 
0x0900000005a6bb24 
sqlpgWriteToDisk__FP9SQLP_DBCBP9SQLP_LFPBUlbT4T3 
0x0900000005a6b6d8 sqlpgPingPong__FP9SQLP_DBCBP9SQLP_LFPBUlbT3 
0x0900000005a6b148 sqlpgwlp__FP9SQLP_DBCBUlT2PC9SQLP_LSN8T2 
0x0900000005a63534 sqlpLoggwMain__11sqpLoggwEduFv
Problem Summary:
**************************************************************** 
* USERS AFFECTED:                                              * 
* Users who use native encryption functionality.               * 
**************************************************************** 
* PROBLEM DESCRIPTION:                                         * 
* See Error Description                                        * 
**************************************************************** 
* RECOMMENDATION:                                              * 
* Please upgrade to DB2 V10.5 fixPack 6 or later.              * 
****************************************************************
Local Fix:
Please turn off native encryption.
Solution
This problem was first fixed in DB2 V10.5 FixPack 6.
Workaround
not known / see Local fix
Timestamps
Date  - problem reported    :
Date  - problem closed      :
Date  - last modified       :

14.04.2015
08.10.2015
08.10.2015
Problem solved at the following versions (IBM BugInfos)


Problem solved according to the fixlist(s) of the following version(s)


10.5.0.6

FixList