MELSRV MEDLINE AND MEDLINE DATABASES Z39.50 SERVER STATISTICS
Time period: 10/07/00 through 10/13/00
1.0 SUMMARY STATISTICS
_______________________
Relative use of MEDLINE AND MEDLINE databases:
Number of
Searches Records Presented
________ _________________
MED (current) 50,946 2,642,292
MED90 9,973 175,320
MED85 7,422 64,371
MED80 6,667 36,842
MED75 6,394 23,796
MED66 6,427 21,393
Per hour usage:
Time Searches Records Presented
_______________ _____________ _________________
12-2 a.m. 2,381 49,037
2-4 a.m. 552 15,128
4-6 a.m. 231 13,281
6-8 a.m. 1,084 44,331
8-10 a.m. 6,273 232,248
10-12 a.m. 14,555 471,877
12-2 p.m. 15,556 528,505
2-4 p.m. 17,673 597,070
4-6 p.m. 14,656 475,788
6-8 p.m. 7,116 274,065
8-10 p.m. 4,511 150,947
10-12 p.m. 3,241 111,737
__________ _____________ _________________
Total: 87,829 2,964,014
1.1 SEARCH commands
____________________
Zero results may indicate no access to the database
Number of SEARCH commands issued by location:
Location Total
________ _____
Berkeley 114
Davis 666
Irvine 35
Los Angeles 790
Riverside 35
San Diego 928
San Francisco 1,440
Santa Barbara 7
Santa Cruz 8
Lawrence Berkeley 41
Lawrence Livermore 4
Los Alamos 4
MELWEB 69,246
Searchlight 13,918
Other - UC 166
Other-Network UC 427
_____
87,829
1.2 Records Presented
______________________
Zero results may indicate no access to the database
Number of Records Presented by location:
Location Total
________ _____
Berkeley 14,155
Davis 8,188
Irvine 475
Los Angeles 4,359
Riverside 157
San Diego 9,574
San Francisco 21,406
Santa Barbara 175
Santa Cruz 143
Lawrence Berkeley 232
Lawrence Livermore 36
Los Alamos 0
MELWEB 2,867,228
Searchlight 29,997
Other - UC 1,519
Other-Network UC 6,370
_____
2,964,014
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 3.4
Present response time from receipt of present request
DLA until transmission of a present response:
Average in seconds 0.2
Standard deviation in seconds 0.5
2.0 MEDLINE AND MEDLINE Databases Detailed Statistics
_________________________________________
Median session length (minutes:seconds) 20:58
Average session length (minutes:seconds) 17:32
Longest session recorded (minutes:seconds) 260:14
Average number of searches completed per session 0.0
Retrievals per search - median 3.0
Retrievals per search - average 590.6
Retrievals per search - standard deviation 7702.6
Percent of searches completed with 0 results 33.7%
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 87,829 13.3%
PRESENT 532,412 80.6%
INIT or CLOSE 39,144 5.9%
OTHER 1,027 0.2%
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 5,533 4.3% 2,177 39.3% 5 1160.9 6320.6
PERSONAL AUTHOR 23,485 18.3% 7,020 29.9% 7 78.5 619.0
TITLE WORD 8,552 6.7% 3,359 39.3% 3 237.7 2755.5
SUBSET 308 0.2% 85 27.6% 24 164.0 883.0
SUBJECT WORD 275 0.2% 162 58.9% 12 3025.0 17709.8
SUBJECT 2,935 2.3% 1,541 52.5% 21 565.2 3422.9
EXACT SUBJECT 6,674 5.2% 1,638 24.5% 30 524.2 3654.7
MAJOR SUBJECT 276 0.2% 114 41.3% 13 325.5 1802.9
EXACT MAJOR SUBJ 512 0.4% 86 16.8% 18 299.5 1098.4
EXACT TITLE 693 0.5% 378 54.5% 1 20.3 140.2
TREE NUMBER 12 0.0% 4 33.3% 49 115.9 191.2
EXACT JOURNAL 1,411 1.1% 574 40.7% 308 1710.2 3591.8
MAJOR TREE NUM 2 0.0% 0 0.0% 64 64.0 0.0
CAS 70 0.1% 29 41.4% 20 1134.5 3726.8
KEYWORD 53,382 41.5% 18,169 34.0% 18 1155.7 11524.6
DATE 1,954 1.5% 492 25.2% 8 154.9 987.2
LANGUAGE 8,827 6.9% 2,516 28.5% 27 456.6 2677.3
UNIQUE ID 818 0.6% 456 55.7% 1 1.2 3.4
ADDED 1,405 1.1% 922 65.6% 4 11.7 25.2
PUB TYPE 3,661 2.8% 955 26.1% 22 186.5 925.2
AUTHOR AFFIL. 774 0.6% 334 43.2% 7 108.8 1526.1
CHEMICAL NAME 34 0.0% 20 58.8% 103 2480.4 5955.6
EXACT CHEMICAL 1 0.0% 1 100% 0 0.0 0.0
AT 6,029 4.7% 1,978 32.8% 23 736.0 6047.2
AGE 395 0.3% 128 32.4% 21 168.8 750.6
ISN 2 0.0% 1 50.0% 1 1.0 0.0
ARTICLE 220 0.2% 61 27.7% 36 411.1 1209.8
XXS 206 0.2% 94 45.6% 37 12847.6 43673.7
XMXS 108 0.1% 29 26.9% 15 182.4 546.5
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 23 0.0% 14 60.9% 11 176.1 403.1
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 26,348 30.0% 9,220 35.0% 9 333.2 3312.7
Single 61,481 70.0% 20,364 33.1% 16 1122.7 11027.3
PRESENT commands, by type:
MARC 33.1%
OPAC 27.8%
SMDmm/dd srv.med MELSRV MEDLINE AND MEDLINE DATABASES Z39.50 SERVER STATISTICS