MELSRV MEDLINE AND MEDLINE DATABASES Z39.50 SERVER STATISTICS
Time period: 05/19/01 through 05/25/01
1.0 SUMMARY STATISTICS
_______________________
Relative use of MEDLINE AND MEDLINE databases:
Number of
Searches Records Presented
________ _________________
MED (current) 51,738 2,593,880
MED90 11,231 155,393
MED85 8,802 65,381
MED80 7,986 37,406
MED75 7,453 25,668
MED66 7,511 26,927
Per hour usage:
Time Searches Records Presented
_______________ _____________ _________________
12-2 a.m. 1,733 50,032
2-4 a.m. 1,394 41,199
4-6 a.m. 340 20,584
6-8 a.m. 1,531 38,049
8-10 a.m. 6,763 224,984
10-12 a.m. 14,644 458,864
12-2 p.m. 16,372 456,230
2-4 p.m. 18,735 543,486
4-6 p.m. 14,727 454,330
6-8 p.m. 8,789 289,212
8-10 p.m. 5,491 193,724
10-12 p.m. 4,202 133,961
__________ _____________ _________________
Total: 94,721 2,904,655
1.1 SEARCH commands
____________________
Zero results may indicate no access to the database
Number of SEARCH commands issued by location:
Location Total
________ _____
Berkeley 186
Davis 790
Irvine 177
Los Angeles 865
Riverside 66
San Diego 525
San Francisco 1,216
Santa Barbara 20
Santa Cruz 32
Lawrence Berkeley 41
Lawrence Livermore 5
Los Alamos 2
MELWEB 74,051
Searchlight 16,040
Other - UC 138
Other-Network UC 567
_____
94,721
1.2 Records Presented
______________________
Zero results may indicate no access to the database
Number of Records Presented by location:
Location Total
________ _____
Berkeley 1,520
Davis 9,663
Irvine 2,028
Los Angeles 9,140
Riverside 641
San Diego 6,041
San Francisco 14,929
Santa Barbara 206
Santa Cruz 179
Lawrence Berkeley 417
Lawrence Livermore 1,119
Los Alamos 70
MELWEB 2,805,271
Searchlight 45,976
Other - UC 2,944
Other-Network UC 4,511
_____
2,904,655
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 3.1
Present response time from receipt of present request
DLA until transmission of a present response:
Average in seconds 0.2
Standard deviation in seconds 0.4
2.0 MEDLINE AND MEDLINE Databases Detailed Statistics
_________________________________________
Median session length (minutes:seconds) 20:45
Average session length (minutes:seconds) 17:04
Longest session recorded (minutes:seconds) 258:35
Average number of searches completed per session 0.0
Retrievals per search - median 2.0
Retrievals per search - average 388.6
Retrievals per search - standard deviation 4401.0
Percent of searches completed with 0 results 35.8%
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 94,721 14.3%
PRESENT 523,603 79.0%
INIT or CLOSE 43,555 6.6%
OTHER 820 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 5,600 4.3% 2,215 39.6% 3 1012.8 6107.8
PERSONAL AUTHOR 24,800 19.1% 7,042 28.4% 7 88.6 644.4
TITLE WORD 10,221 7.9% 4,042 39.5% 3 220.6 2121.3
SUBSET 143 0.1% 61 42.7% 27 583.3 4000.5
SUBJECT WORD 137 0.1% 64 46.7% 6 856.8 4460.8
SUBJECT 2,602 2.0% 1,343 51.6% 14 759.6 4105.9
EXACT SUBJECT 4,419 3.4% 1,040 23.5% 36 575.5 3297.8
MAJOR SUBJECT 307 0.2% 181 59.0% 16 929.2 2927.8
EXACT MAJOR SUBJ 531 0.4% 148 27.9% 20 248.6 764.7
EXACT TITLE 785 0.6% 437 55.7% 1 277.4 3097.3
TREE NUMBER 0 0.0% 0 0.0% 0 0.0 0.0
EXACT JOURNAL 1,205 0.9% 346 28.7% 461 2069.2 4208.7
MAJOR TREE NUM 0 0.0% 0 0.0% 0 0.0 0.0
CAS 31 0.0% 17 54.8% 71 1007.0 1596.5
KEYWORD 59,951 46.2% 22,795 38.0% 16 732.9 6577.0
DATE 2,031 1.6% 545 26.8% 6 88.7 416.6
LANGUAGE 6,377 4.9% 1,634 25.6% 31 459.8 3229.1
UNIQUE ID 137 0.1% 71 51.8% 1 1.0 0.0
ADDED 1,030 0.8% 593 57.6% 4 22.9 47.5
PUB TYPE 3,133 2.4% 791 25.2% 20 195.5 845.8
AUTHOR AFFIL. 597 0.5% 267 44.7% 10 221.9 1301.5
CHEMICAL NAME 17 0.0% 17 100% 0 0.0 0.0
EXACT CHEMICAL 3 0.0% 2 66.7% 22 22.0 0.0
AT 5,059 3.9% 1,411 27.9% 25 534.1 2578.9
AGE 258 0.2% 52 20.2% 32 307.9 867.4
ISN 0 0.0% 0 0.0% 0 0.0 0.0
ARTICLE 130 0.1% 26 20.0% 21 1140.8 3747.8
XXS 142 0.1% 52 36.6% 8 106.2 370.7
XMXS 74 0.1% 22 29.7% 12 231.3 827.6
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 53 0.0% 43 81.1% 139 186.4 219.3
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 24,561 25.9% 8,323 33.9% 8 279.4 2307.4
Single 70,160 74.1% 25,548 36.4% 16 723.5 6241.5
PRESENT commands, by type:
MARC 29.5%
OPAC 31.6%
SMDmm/dd srv.med MELSRV MEDLINE AND MEDLINE DATABASES Z39.50 SERVER STATISTICS