MELSRV MEDLINE AND MEDLINE DATABASES Z39.50 SERVER STATISTICS
Time period: 10/01/01 through 10/31/01
1.0 SUMMARY STATISTICS
_______________________
Relative use of MEDLINE AND MEDLINE databases:
Number of
Searches Records Presented
________ _________________
MED (current) 172,699 9,436,072
MED90 33,689 720,405
MED85 25,950 213,929
MED80 22,962 104,242
MED75 21,700 72,626
MED66 21,978 75,262
Per hour usage:
Time Searches Records Presented
_______________ _____________ _________________
12-2 a.m. 7,137 208,301
2-4 a.m. 3,602 97,295
4-6 a.m. 1,275 52,972
6-8 a.m. 4,361 138,488
8-10 a.m. 22,223 854,849
10-12 a.m. 50,085 1,747,378
12-2 p.m. 52,857 1,847,111
2-4 p.m. 60,983 2,161,758
4-6 p.m. 47,592 1,729,389
6-8 p.m. 23,352 901,290
8-10 p.m. 15,672 541,035
10-12 p.m. 9,839 342,670
__________ _____________ _________________
Total: 298,978 10,622,536
1.1 SEARCH commands
____________________
Zero results may indicate no access to the database
Number of SEARCH commands issued by location:
Location Total
________ _____
Berkeley 3,799
Davis 2,373
Irvine 332
Los Angeles 2,638
Riverside 109
San Diego 1,855
San Francisco 3,534
Santa Barbara 108
Santa Cruz 69
Lawrence Berkeley 52
Lawrence Livermore 28
Los Alamos 47
MELWEB 0
Searchlight 44,644
Other - UC 238,015
Other-Network UC 1,375
_____
298,978
1.2 Records Presented
______________________
Zero results may indicate no access to the database
Number of Records Presented by location:
Location Total
________ _____
Berkeley 606,818
Davis 35,844
Irvine 2,306
Los Angeles 29,771
Riverside 1,395
San Diego 12,934
San Francisco 54,593
Santa Barbara 584
Santa Cruz 584
Lawrence Berkeley 542
Lawrence Livermore 471
Los Alamos 310
MELWEB 0
Searchlight 0
Other - UC 9,853,237
Other-Network UC 23,147
_____
10,622,536
1.3 Response time
__________________
Search response time from receipt of search request
DLA until transmission of search response:
Average in seconds 0.9
Standard deviation in seconds 3.5
Present response time from receipt of present request
DLA until transmission of a present response:
Average in seconds 0.2
Standard deviation in seconds 0.8
2.0 MEDLINE AND MEDLINE Databases Detailed Statistics
_________________________________________
Median session length (minutes:seconds) 20:44
Average session length (minutes:seconds) 16:40
Longest session recorded (minutes:seconds) 298:05
Average number of searches completed per session 0.0
Retrievals per search - median 3.0
Retrievals per search - average 546.2
Retrievals per search - standard deviation 8280.2
Percent of searches completed with 0 results 34.0%
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 298,978 12.4%
PRESENT 1,973,660 81.8%
INIT or CLOSE 137,561 5.7%
OTHER 2,364 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 19,588 4.7% 7,985 40.8% 4 911.8 4153.8
PERSONAL AUTHOR 85,035 20.4% 24,178 28.4% 7 83.4 684.6
TITLE WORD 34,171 8.2% 13,261 38.8% 3 228.5 3117.1
SUBSET 588 0.1% 179 30.4% 20 388.1 2557.7
SUBJECT WORD 356 0.1% 210 59.0% 10 1759.0 16927.0
SUBJECT 7,433 1.8% 4,063 54.7% 19 921.3 7385.6
EXACT SUBJECT 14,252 3.4% 4,438 31.1% 33 645.8 4177.5
MAJOR SUBJECT 457 0.1% 195 42.7% 19 175.5 942.5
EXACT MAJOR SUBJ 1,121 0.3% 309 27.6% 28 336.1 979.5
EXACT TITLE 3,160 0.8% 1,772 56.1% 1 25.9 222.3
TREE NUMBER 0 0.0% 0 0.0% 0 0.0 0.0
EXACT JOURNAL 6,280 1.5% 1,556 24.8% 275 1287.8 3202.8
MAJOR TREE NUM 0 0.0% 0 0.0% 0 0.0 0.0
CAS 169 0.0% 69 40.8% 28 205.7 406.1
KEYWORD 179818 43.2% 63,885 35.5% 19 1140.5 13016.5
DATE 8,536 2.1% 2,000 23.4% 23 187.6 719.6
LANGUAGE 20,299 4.9% 6,474 31.9% 28 524.6 3770.8
UNIQUE ID 546 0.1% 308 56.4% 1 65.9 1000.2
ADDED 4,474 1.1% 2,090 46.7% 5 16.0 43.3
PUB TYPE 9,560 2.3% 2,257 23.6% 24 196.8 1138.0
AUTHOR AFFIL. 2,399 0.6% 1,041 43.4% 11 118.9 1174.0
CHEMICAL NAME 41 0.0% 11 26.8% 99 316.9 387.3
EXACT CHEMICAL 2 0.0% 2 100% 0 0.0 0.0
AT 15,664 3.8% 5,678 36.2% 23 763.4 3823.0
AGE 700 0.2% 194 27.7% 33 251.8 1383.6
ISN 5 0.0% 2 40.0% 1 1.0 0.0
ARTICLE 501 0.1% 146 29.1% 58 576.3 2615.7
XXS 409 0.1% 170 41.6% 11 648.8 7167.4
XMXS 157 0.0% 67 42.7% 10 114.4 336.6
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 217 0.1% 180 82.9% 3 20.4 36.2
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 81,013 27.1% 28,039 34.6% 8 310.9 2632.1
Single 217,965 72.9% 73,713 33.8% 17 1017.8 11794.2
PRESENT commands, by type:
MARC 35.9%
OPAC 26.0%
SMDmm/dd srv.med MELSRV MEDLINE AND MEDLINE DATABASES Z39.50 SERVER STATISTICS