MELSRV MEDLINE AND MEDLINE DATABASES Z39.50 SERVER STATISTICS
Time period: 04/14/01 through 04/20/01
1.0 SUMMARY STATISTICS
_______________________
Relative use of MEDLINE AND MEDLINE databases:
Number of
Searches Records Presented
________ _________________
MED (current) 51,455 3,529,136
MED90 10,095 177,368
MED85 7,785 67,076
MED80 7,130 41,426
MED75 6,437 25,520
MED66 6,647 32,082
Per hour usage:
Time Searches Records Presented
_______________ _____________ _________________
12-2 a.m. 2,016 141,908
2-4 a.m. 848 205,064
4-6 a.m. 386 106,550
6-8 a.m. 1,367 147,475
8-10 a.m. 6,708 278,332
10-12 a.m. 14,891 578,826
12-2 p.m. 14,915 563,798
2-4 p.m. 19,055 658,215
4-6 p.m. 13,484 530,519
6-8 p.m. 7,246 302,996
8-10 p.m. 5,302 204,333
10-12 p.m. 3,331 154,592
__________ _____________ _________________
Total: 89,549 3,872,608
1.1 SEARCH commands
____________________
Zero results may indicate no access to the database
Number of SEARCH commands issued by location:
Location Total
________ _____
Berkeley 506
Davis 543
Irvine 149
Los Angeles 755
Riverside 173
San Diego 776
San Francisco 1,132
Santa Barbara 9
Santa Cruz 3
Lawrence Berkeley 111
Lawrence Livermore 28
Los Alamos 5
MELWEB 70,350
Searchlight 14,535
Other - UC 25
Other-Network UC 449
_____
89,549
1.2 Records Presented
______________________
Zero results may indicate no access to the database
Number of Records Presented by location:
Location Total
________ _____
Berkeley 5,422
Davis 7,111
Irvine 3,249
Los Angeles 9,829
Riverside 671
San Diego 6,516
San Francisco 9,090
Santa Barbara 38
Santa Cruz 3
Lawrence Berkeley 999
Lawrence Livermore 319
Los Alamos 46
MELWEB 3,093,507
Searchlight 727,461
Other - UC 188
Other-Network UC 8,159
_____
3,872,608
1.3 Response time
__________________
Search response time from receipt of search request
DLA until transmission of search response:
Average in seconds 0.8
Standard deviation in seconds 2.6
Present response time from receipt of present request
DLA until transmission of a present response:
Average in seconds 0.3
Standard deviation in seconds 0.5
2.0 MEDLINE AND MEDLINE Databases Detailed Statistics
_________________________________________
Median session length (minutes:seconds) 20:59
Average session length (minutes:seconds) 17:56
Longest session recorded (minutes:seconds) 227:13
Average number of searches completed per session 0.0
Retrievals per search - median 3.0
Retrievals per search - average 520.1
Retrievals per search - standard deviation 6627.3
Percent of searches completed with 0 results 32.5%
Percent of searches entered that are long 0.0%
Percent of long searches completed
(includes partial results) 100%
Commands entered, by type, excluding errors:
Total Percentage
__________ __________
SEARCH 89,549 10.3%
PRESENT 737,658 85.0%
INIT or CLOSE 40,011 4.6%
OTHER 853 0.1%
SEARCHes completed: RETRIEVALS PER NON-
TOTAL ZERO RESULTS ZERO RESULT SEARCHES
_____________ ______________ ______________________
% of % of
all all for Std.
No. SEARCHes No. Index Median Avg. Dev.
______ _________ ______ _______ ______ __________ _______
By index:
JOURNAL 5,349 4.2% 2,167 40.5% 4 867.7 4409.7
PERSONAL AUTHOR 23,812 18.9% 6,551 27.5% 8 82.0 726.4
TITLE WORD 10,457 8.3% 4,056 38.8% 3 176.9 1896.5
SUBSET 208 0.2% 52 25.0% 27 149.0 388.0
SUBJECT WORD 227 0.2% 107 47.1% 9 718.6 6533.2
SUBJECT 2,300 1.8% 1,062 46.2% 22 1338.2 6180.1
EXACT SUBJECT 5,039 4.0% 1,259 25.0% 35 603.8 4226.4
MAJOR SUBJECT 180 0.1% 67 37.2% 80 659.3 2389.2
EXACT MAJOR SUBJ 461 0.4% 78 16.9% 18 262.5 1135.1
EXACT TITLE 893 0.7% 504 56.4% 1 29.9 381.2
TREE NUMBER 0 0.0% 0 0.0% 0 0.0 0.0
EXACT JOURNAL 1,091 0.9% 266 24.4% 525 1900.5 3730.7
MAJOR TREE NUM 0 0.0% 0 0.0% 0 0.0 0.0
CAS 11 0.0% 3 27.3% 23 23.0 20.7
KEYWORD 54,837 43.5% 18,513 33.8% 19 1024.3 10088.2
DATE 2,199 1.7% 490 22.3% 8 222.5 1821.0
LANGUAGE 7,027 5.6% 1,840 26.2% 30 637.1 5608.1
UNIQUE ID 352 0.3% 72 20.5% 1 1.0 0.0
ADDED 1,696 1.3% 276 16.3% 25 93.0 242.2
PUB TYPE 2,906 2.3% 717 24.7% 23 322.8 2983.0
AUTHOR AFFIL. 692 0.5% 359 51.9% 9 81.3 615.2
CHEMICAL NAME 27 0.0% 24 88.9% 2 17.0 26.9
EXACT CHEMICAL 1 0.0% 0 0.0% 14 14.0 0.0
AT 5,176 4.1% 1,544 29.8% 30 790.8 4916.8
AGE 279 0.2% 58 20.8% 47 293.0 1063.9
ISN 0 0.0% 0 0.0% 0 0.0 0.0
ARTICLE 145 0.1% 17 11.7% 104 859.0 3805.1
XXS 379 0.3% 138 36.4% 7 1331.4 14247.1
XMXS 147 0.1% 32 21.8% 26 140.4 672.3
XS 2 0 0.0% 0 0.0% 0 0.0 0.0
MXS 2 0 0.0% 0 0.0% 0 0.0 0.0
Other indexes 72 0.1% 56 77.8% 14 137.3 251.6
RETRIEVALS PER NON-
TOTAL ZERO RESULTS ZERO RESULT SEARCHES
_____________ ______________ ______________________
% of % of
all all for Std.
No. SEARCHes No. Index Median Avg. Dev.
______ _________ ______ _______ ______ __________ _______
By number of indexes:
Multiple 24,195 27.0% 7,807 32.3% 10 362.8 3635.2
Single 65,354 73.0% 21,311 32.6% 17 922.5 9167.0
PRESENT commands, by type:
MARC 20.7%
OPAC 48.4%
SMDmm/dd srv.med MELSRV MEDLINE AND MEDLINE DATABASES Z39.50 SERVER STATISTICS